scholarly journals EVAPOTRANSPIRAÇÃO E COEFICIENTE DE CULTURA DA ALSTROEMERIA (Alstroemeria x hybrida) CULTIVADA EM ESTUFA

Irriga ◽  
2016 ◽  
Vol 21 (4) ◽  
pp. 817-829 ◽  
Author(s):  
Leonita Beatriz Girardi ◽  
Marcia Xavier Peiter ◽  
Rogério Antonio Bellé ◽  
Adroaldo Dias Robaina ◽  
Rogério Ricalde Torres ◽  
...  
Keyword(s):  
Water Consumption ◽  
Reference Evapotranspiration ◽  
Irrigation Management ◽  
Crop Coefficient ◽  
Growth Stages ◽  
Crop Evapotranspiration ◽  
Retention Capacity ◽  
Full Flowering ◽  
Crop Coefficients ◽  
Santa Maria

EVAPOTRANSPIRAÇÃO E COEFICIENTE DE CULTURA DA ALSTROEMERIA (Alstroemeria x hybrida) CULTIVADA EM ESTUFA  LEONITA BEATRIZ GIRARDI1; MARCIA XAVIER PEITER²; ROGERIO ANTONIO BELLɳ; ADROALDO DIAS ROBAINA4; ROGÉRIO RICALDE TORRES5; JARDEL HENRIQUE KIRCHNER5 E LUIS HUMBERTO BAHÚ BEN5 1 Eng. Agrônoma, Mestra, Doutoranda no Programa de Pós-Graduação em Engenharia Agrícola, Universidade Federal de Santa Maria/UFSM, Santa Maria-RS, 97195-000, [email protected] Eng. Agrônoma, Doutora, Professora Associada do Departamento de Engenharia Rural, UFSM, Santa Maria-RS, 97195-000, [email protected] Eng. Agrônomo, Doutor, Professor Associado do Departamento de Fitotecnia, UFSM, Santa Maria-RS, 97195-000, [email protected] Eng. Agrônomo, Doutor, Professor Titular do Departamento de Engenharia Rural, UFSM, Santa Maria-RS, 97195-000, [email protected] Eng. Agrônomo, Mestre, Doutorando no Programa de Pós-Graduação em Engenharia Agrícola, UFSM, Santa Maria-RS, 97195-000, [email protected], [email protected], [email protected].  1 RESUMO A determinação da necessidade hídrica de uma cultura específica ao longo do seu ciclo é essencial para o correto manejo da irrigação. O objetivo da presente pesquisa foi determinar a evapotranspiração e o coeficiente de cultivo (Kc) da Alstroemeria x hybrida cultivada em ambiente protegido. A determinação da evapotranspiração da cultura (ETc) foi por lisimetria de pesagem, já a evapotranspiração de referência (ETo) foi determinada pelo método de Penman-Monteith. O experimento foi conduzido em estufa climatizada no Colégio Politécnico da UFSM, Santa Maria-RS, tendo como tratamento cinco lâminas de irrigação/reposição de água em relação à capacidade de retenção de vaso (CRV) (30, 45, 60, 75 E 90 % da CRV).  O delineamento experimental adotado foi um DIC, delineamento inteiramente casualizado, com um total de dez repetições, sendo uma planta por vaso. Para a avaliação do Kc, foi usado o limite de 90% da capacidade de recipiente. O coeficiente cultural foi obtido pela relação entre a ETc e a ETo. O consumo de água para a cultura da Alstroemeria x hybrida nos tratamentos com limite de disponibilidade hídrica variou de 47,6 mm a 207,8 mm. A média do coeficiente de cultura da Alstroemeria x hybrida cultivada em ambiente protegido foi de 0,39 para o período vegetativo, 0,41 no inicio do florescimento, 0,95 para florescimento, 1,50 para pleno florescimento e 0,75 para a queda no florescimento. Palavras-chave: necessidade hídrica, flor de corte, manejo de irrigação, coeficiente cultural.  GIRARDI, L. B.; PEITER, M. X.; BELLÉ, R. A.; ROBAINA, A. D.; TORRES, R. R.; KIRCHNER, J. H.; BEN, L. H. B.EVAPOTRANSPIRATION AND CROP COEFFICIENTS OF POTTED Alstroemeria x hybrida GROWN IN GREENHOUSE   2 ABSTRACT The determination of water requirements of a crop throughout its cycle is critical for a proper irrigation management. The objective of this study was to determine the evapotranspiration and crop coefficient (Kc) of Alstroemeria x hybrida grown under greenhouse conditions. The crop evapotranspiration (ETc) was determined by weighing lysimeters, and the reference evapotranspiration (ETo) was estimated by the Penman-Monteith method. The Experiment was conducted under controlled conditions at the Polytechnic College of UFSM, Santa Maria, RS, and the treatment comprised five depths for water replacement associated to the pot retention capacity (WHC) (30, 45, 60, 75 and 90% of WHC). The experimental design adopted was completely randomized, with ten repetitions, one plant per pot.   For the evaluation of Kc, 90% of the container capacity was consideredas limit. The crop coefficient was obtained by the relationship between the crop evapotranspiration and reference evapotranspiration. Our results demonstrated that water consumption for Alstroemeria x hybrida in the treatments with a limit of water availability varied from 47.6 mm to 207.8 mm. The average crop coefficient of Alstroemeria x hybrida grown under greenhouse conditions was 0.39 for the growth stages, 0.41 for the beginning of flowering, 0.95 for flowering, and1.50 and 0.75 for full flowering and for the end of the flowering, respectively. Keywords: water consumption, cut flower, irrigation management, crop coefficient.

scholarly journals EVAPOTRANSPIRAÇÃO, COEFICIENTE DE CULTURA E CRESCIMENTO DE CANA-DE-AÇÚCAR PLANTADA POR MUDAS PRÉ-BROTADAS E POR TOLETES

Irriga ◽  
2021 ◽  
Vol 1 (3) ◽  
pp. 517-529
Author(s):  
MARIA EDUARDA NAJM SANDRINI ◽  
ALEXANDRE BARCELLOS DALRI ◽  
ANDERSON PRATES COELHO ◽  
ROGÉRIO TEIXEIRA DE FARIA ◽  
LUIZ FABIANO PALARETTI
Keyword(s):  
Regression Analysis ◽  
Water Balance ◽  
Water Consumption ◽  
Reference Evapotranspiration ◽  
Crop Coefficient ◽  
Bare Soil ◽  
Initial Growth ◽  
Crop Evapotranspiration ◽  
Agronomic Practices ◽  
Crop Coefficients

EVAPOTRANSPIRAÇÃO, COEFICIENTE DE CULTURA E CRESCIMENTO DE CANA-DE-AÇÚCAR PLANTADA POR MUDAS PRÉ-BROTADAS E POR TOLETES   MARIA EDUARDA NAJM SANDRINI1, ALEXANDRE BARCELLOS DALRI1, ANDERSON PRATES COELHO1, ROGÉRIO TEIXEIRA DE FARIA1, LUIZ FABIANO PALARETTI1   1Departamento de Engenharia e Ciências Exatas, Faculdade de Ciências Agrárias e Veterinárias, Jaboticabal, SP, Brasil. [email protected], [email protected], [email protected], [email protected], [email protected]   1 RESUMO   Atualmente, a cana-de-açúcar apresenta diversos modos de plantio, destacando-se o plantio por mudas pré-brotadas. Esse sistema necessita de novos estudos para a recomendação adequada das práticas agronômicas, como a irrigação. Objetivou-se nesse trabalho avaliar e comparar o consumo hídrico, o coeficiente de cultura e o crescimento inicial da cana-de-açúcar plantada por mudas pré-brotadas (MPB) e por toletes. Foram definidos quatro tratamentos: cana-de-açúcar plantada por MPB e por toletes, plantio de grama batatais e solo nu, todos mantidos em lisímetros de pesagem. A evapotranspiração de referência (ETo) foi medida em lisímetros com a cultura de referência (grama). A evapotranspiração da cultura (ETc) da cana-de-açúcar plantada por MPB e toletes foi estimada por meio do balanço hídrico do solo. A estimativa dos coeficientes de cultura (Kc) foi obtida pela razão entre a ETc dos lisímetros com cana e a ETo. A comparação das variáveis entre a cana-de-açúcar plantada por MPB e por toletes foi realizada por análise de regressão. O Kc da cana-de-açúcar plantada por toletes variou de 0,86 a 2,88 e do plantio por MPB de 1,12 a 3,10. A cana-de-açúcar plantada por MPB apresenta maior consumo hídrico, coeficiente de cultura e crescimento inicial do que quando plantada por toletes.   Palavras-chave: arduino, consumo hídrico, irrigação, Kc, lisímetro de pesagem.     SANDRINI, M.E.N; DALRI, A.B.; COELHO, A.P.; FARIA, R.T. de, PALARETTI, L.F. EVAPOTRANSPIRATION, CROP COEFFICIENT AND SUGARCANE GROWTH PLANTED BY PRE-SPROUTED SEEDLINGS AND STALKS     2 ABSTRACT   Currently, the sugarcane presents several types of planting, especially the planting by pre-sprouted seedlings. This system needs new studies for the adequate recommendation of agronomic practices, such as irrigation. We aimed in this work to evaluate and compare the water consumption, crop coefficient and initial growth of sugarcane planted by pre-sprouted seedlings (PSS) and stalks. Four treatments were defined, being sugarcane planted by PSS and by stalks, bahiagrass grass and bare soil, all kept in weighing lysimeters. The reference evapotranspiration (ETo) was measured in the grass lysimeters. The crop evapotranspiration (ETc) of sugarcane planted by PSS and stalks was estimated by the water balance in the soil. The estimation of the crop coefficients (Kc) was obtained from the ratio between ETc of lysimeters with sugarcane and ETo. Comparison of the variables between planted sugarcane by PSS and by stalks was performed by regression analysis. The Kc of the sugarcane planted by stalks ranged between 0.86 to 2.88 and planting by PSS from 1.12 to 3.10. The sugarcane planted by PSS presents higher water consumption, crop coefficient and initial growth than when planted by stalks.   Keywords: arduino, water consumption, irrigation, Kc, weighing lysimeter.

scholarly journals Performance of methods for estimation of table beet water requirement in Alagoas

2018 ◽  
Vol 22 (3) ◽  
pp. 189-193 ◽  
Author(s):  
Daniella P. dos Santos ◽  
Célia S. dos Santos ◽  
Leiliane M. da Silva ◽  
Márcio A. L. dos Santos ◽  
Cícero G. dos Santos
Keyword(s):  
Water Use ◽  
Standard Method ◽  
Water Scarcity ◽  
Performance Index ◽  
Reference Evapotranspiration ◽  
Irrigation Management ◽  
Crop Evapotranspiration ◽  
Abstract Optimization ◽  
Crop Coefficients ◽  
Drainage Lysimeter

ABSTRACT Optimization of water use in agriculture is fundamental, particularly in regions where water scarcity is intense, requiring the adoption of technologies that promote increased irrigation efficiency. The objective of this study was to evaluate evapotranspiration models and to estimate the crop coefficients of beet grown in a drainage lysimeter in the Agreste region of Alagoas. The experiment was conducted at the Campus of the Federal University of Alagoas - UFAL, in the municipality of Arapiraca, AL, between March and April 2014. Crop evapotranspiration (ETc) was estimated in drainage lysimeters and reference evapotranspiration (ETo) by Penman-Monteith-FAO 56 and Hargreaves-Samani methods. The Hargreaves-Samani method presented a good performance index for ETo estimation compared with the Penman-Monteith-FAO method, indicating that it is adequate for the study area. Beet ETc showed a cumulative demand of 202.11 mm for a cumulative reference evapotranspiration of 152.00 mm. Kc values determined using the Penman-Monteith-FAO 56 and Hargreaves-Samani methods were overestimated, in comparison to the Kc values of the FAO-56 standard method. With the obtained results, it is possible to correct the equations of the methods for the region, allowing for adequate irrigation management.

scholarly journals Validation of Crop Coefficients and Water Requirement of Maize Crop in the Temperate Climatic Region of India

2020 ◽  
Vol 8 (5) ◽  
pp. 5132-5138
Keyword(s):  
Water Balance ◽  
Reference Evapotranspiration ◽  
Crop Coefficient ◽  
Growth Period ◽  
Water Requirement ◽  
Balance Method ◽  
Growth Stages ◽  
Maize Crop ◽  
Water Balance Method ◽  
Crop Coefficients

The field study was conducted on Lysimeter by employing the soil water balance method to compute the water requirement and Crop coefficient of Maize in the temperate climatic zone of India. Non-weighing type lysimeters (drainage type) of 2 × 1.5 × 2 m was installed to compute the irrigation requirement, actual crop evapotranspiration (ETc) and actual crop coefficient of maize by water balance method. The water requirement of maize was found 410.4 mm using lysimeter data. The mean daily reference evapotranspiration (ETo) of maize ranged from 0.91 mm/day in the starting growth period to 5.29 mm/day at midseason. The peak ETo of Maize was found 6.3mm/day. The computed crop coefficient (Kc) values of Maize for diffrent crop growth stages were 0.53 for intial, 0.93 for development , 1.05 for mid-season, and 0.78 for late season .A Correlation was also established between Penman-Monteith (P-M) and four other reference Evapotranspiration methods.

scholarly journals Water requirement and crop coefficients of sorghum in Apodi Plateau

2021 ◽  
Vol 25 (10) ◽  
pp. 684-688
Author(s):  
João G. A. Lima ◽  
José Espínola Sobrinho ◽  
José F. de Medeiros ◽  
Paula C. Viana ◽  
Rudah M. Maniçoba
Keyword(s):  
Vegetation Index ◽  
Normalized Difference Vegetation Index ◽  
Irrigation Management ◽  
High Growth ◽  
Crop Coefficient ◽  
Northeastern Brazil ◽  
Crop Evapotranspiration ◽  
Water Requirements ◽  
Total Crop ◽  
Crop Coefficients

ABSTRACT Sorghum is of significant economic importance for Northeastern Brazil, since it exhibits high growth rates in regions with irregular rainfall distribution and high temperatures, and is an alternative to corn, which has greater water requirements. Despite being a traditional crop in the region, there are few studies on irrigation management in the Apodi plateau. The aim of this study was to determine the evapotranspiration of the crop and the crop coefficient (Kc) for the different stages of sorghum growth in two cycles, and establish the relationship between the Kc and the normalized difference vegetation index (NDVI) obtained by radiometry. Two weighing lysimeters were used to estimate crop evapotranspiration (ETc). Reference evapotranspiration (ETo) was estimated by the Penman-Monteith method (FAO) and the crop coefficient determined using two methodologies: simple Kc and dual Kc. Total crop evapotranspiration in the two cycles was 452 and 557 mm. The ETc value was 23% higher in the second cycle compared to the first. The maximum Kc values for the first and second cycles were 1.21 and 1.35, respectively, using the dual Kc methodology. The linear relationship found between the Kc values and the NDVI allows monitoring and estimating the water requirements of the crop.

scholarly journals Estimativa da Evapotranspiração e dos Coeficientes de Cultura para Diferentes Fases de Desenvolvimento da Melancia (Evapotranspiration Estimate and Cultural Factors for Diferent Stages of Development of Watermelon)

2013 ◽  
Vol 6 (5) ◽  
pp. 1417 ◽  
Author(s):  
Antonio Ricardo Santos de Andrade ◽  
Adiel Felipe da Silva Cruz ◽  
Edson Carlos dos Santos Cavalcante ◽  
José Claudio Faustino de Albuquerque ◽  
Werônica Meira de Souza
Keyword(s):  
Irrigation System ◽  
Irrigation Management ◽  
Crop Coefficient ◽  
Main Element ◽  
Experimental Unit ◽  
Management Approach ◽  
Crop Evapotranspiration ◽  
Crop Development ◽  
Maximum Water ◽  
Crop Coefficients

A evapotranspiração constitui no principal elemento envolvido nas exigências hídricas das culturas, sua estimativa deve ser precisa, sendo utilizada no manejo da irrigação, como também na tomada de decisão que consiste em determinar se a cultura atende as condições edafoclimáticas da região. Um dos métodos de manejo da irrigação que se destaca por aproximar ao máximo a quantidade ideal de água a ser oferecida à cultura é a determinação da evapotranspiração da cultura (ETc). Sendo assim, o presente trabalho objetivou em estimar a evapotranspiração da cultura (ETc) e do coeficiente de cultura (Kc) para diferentes fases fenológicas na melancia. A variedade utilizada foi a Crimson Sweet, semeados no espaçamento de 1,5 m x 0,75 m onde o sistema de irrigação empregado foi por gotejamento. Para tanto, o experimento foi conduzido na área experimental da Unidade acadêmica de Garanhuns da UFRPE, no período de 01/02/2013 a 07/04/2013. O cálculo do Kc foi obtido pela relação entre ETc e ETo calculada pelo método do balanço hídrico do solo e estimada pelo método de tanque Classe A, respectivamente, no período de 01 até 66 dias após o plantio (DAP). A evapotranspiração média da cultura da melancia nos 66 dias do balanço foi de 11,36 mm dia-1 e os valores médios dos coeficientes de cultivo (Kc) obtidos pela relação entre ETc e ETo foram 1,80; 1,97; 1,84 e 1,60 para a fase vegetativa, floração, maturação e colheita, respectivamente, e o máximo consumo de água pela cultura deu-se no estádio de floração. A B S T R A C T Evapotranspiration is the main element involved in crop water requirements, your estimate should be accurate, by using management of irrigation systems also with decision making that is whether the culture meets the ecological conditions of the region. One of the methods of irrigation management approach that stands out the most optimum amount of water to be offered to culture is the estimate of crop evapotranspiration (ETc). Therefore, this study aimed to determine the crop evapotranspiration (ETc) and crop coefficient (Kc) for different stages of crop development watermelon. We used the Crimson Sweet variety, sown at a spacing of 1.5 mx 0.75 m where the irrigation system was used drip. Therefore, an experiment was conducted at the experimental unit of Academic Garanhuns/UFRPE, from 01/02/2013 to 07/04/2013. The calculation of Kc was obtained by the ratio of ETc and ETo calculated by the method of soil water balance and estimated by the method of Class A pan, respectively, from 01 to 66 days after planting (DAP). The average evapotranspiration of watermelon crop in 66 days the balance was 11.36 mm day-1 and the average values of crop coefficients (Kc) obtained by the relationship between ETc and ETo were 1.80, 1.97, 1, 84 and 1.60 for the vegetative stage, flowering, ripening and harvesting, respectively, and the maximum water consumption by the crop yield in the flowering stag

scholarly journals Water consumption of the estevia (Stevia rebaudiana (Bert.) Bertoni) crop estimated through microlysimeter

2003 ◽  
Vol 60 (3) ◽  
pp. 595-599 ◽  
Author(s):  
Diniz Fronza ◽  
Marcos Vinícius Folegatti
Keyword(s):  
Water Resource ◽  
Crop Yield ◽  
Water Consumption ◽  
Reference Evapotranspiration ◽  
Stevia Rebaudiana ◽  
Crop Coefficient ◽  
Water Requirement ◽  
Crop Evapotranspiration ◽  
Rational Use ◽  
Leaf Yield

The knowledge of water requirement of crops in the different growing phases elicits higher crop yield and rational use of water resource. The aim of this work was to estimate the water consumption of stevia using two constant watertable microlysimeters. The research was conducted in San Piero a Grado, Pisa, Italy. The data were collected daily from June, 1st, to October, 22th, 2000. Reference evapotranspiration was determined by the Penman-Monteith-FAO method, in the same period. Microlysimeters watertables level were maintained at the 35 cm depth. Crop evapotranspiration for the total cicle (80 days) was 464 mm. For the most water consuming phase, crop average evapotranspiration was 5.44 mm day-1. The crop coefficient values were 1.45 for the first 25 days, 1.14 for the next period (26 to 50 days), and 1.16 for the latest period (51 to 80 days). The stevia leaf yield of the microlysimeters was 4.369 kg ha-1 and their steviosideo content 6.49%.

scholarly journals CONSUMO HÍDRICO DO MANJERICÃO POR MEIO DE LISÍMETRO DE DRENAGEM

Irriga ◽  
2015 ◽  
Vol 20 (4) ◽  
pp. 745-761 ◽  
Author(s):  
PATRICIA ANGÉLICA ALVES MARQUES ◽  
Jefferson Vieira Jose ◽  
Hermes Soares Da Rocha ◽  
EUSÍMIO FELISBINO FRAGA JÚNIOR ◽  
DANIEL ALVES SOARES ◽  
...  
Keyword(s):  
Water Consumption ◽  
Vegetation Index ◽  
Irrigation Management ◽  
Crop Coefficient ◽  
Sao Paulo ◽  
Ocimum Basilicum ◽  
São Paulo ◽  
Crop Evapotranspiration ◽  
Mato Grosso ◽  
Climate Conditions

CONSUMO HÍDRICO DO MANJERICÃO POR MEIO DE LISÍMETRO DE DRENAGEM  PATRICIA ANGÉLICA ALVES MARQUES¹; JEFFERSON VIEIRA JOSÉ2; HERMES SOARES DA ROCHA3; EUSÍMIO FELISBINO FRAGA JÚNIOR4; DANIEL ALVES SOARES5 E SERGIO NASCIMENTO DUARTE¹ 1 Professor(a), Departamento de Engenharia de Biossistemas, Escola Superior de Agricultura “Luiz de Queiroz”, Universidade de São Paulo, Av. Pádua Dias, 11, 13418-900, Piracicaba, SP, [email protected], [email protected] Pós-doutorando, Departamento de Engenharia de Biossistemas, Escola Superior de Agricultura “Luiz de Queiroz”, Universidade de São Paulo, Av. Pádua Dias, 11, 13418-900, Piracicaba, SP, [email protected], Departamento de Engenharia de Biossistemas, Escola Superior de Agricultura “Luiz de Queiroz”, Universidade de São Paulo, Av. Pádua Dias, 11, 13418-900, Piracicaba, SP, [email protected] Professor Adjunto, Instituto de Ciências Agrárias - ICIAG, Universidade Federal de Uberlândia – UFU, Campus Monte Carmelo, Avenida Goiás, 2000, 38500-000 – Monte Carmelo, MG, [email protected] Professor, Universidade Estadual do Mato Grosso, Av. dos Ingás, 3001, 78555-000, Jardim Imperial, Sinop, MT, [email protected]  1 RESUMO A avaliação da necessidade hídrica e do coeficiente de cultura é de grande relevância para um adequado manejo da irrigação. No entanto, há carência de informações sobre a cultura do manjericão. Objetivou-se neste trabalho avaliar o consumo hídrico do manjericão e estimar o seu coeficiente de cultura (Kc), relacionando-o à soma de graus dia (GD) e ao índice de cobertura vegetal (IC). Foram utilizados três lisímetros de drenagem, sendo a contabilização da evapotranspiração da cultura (ETc), em mm d-1, realizada pelas entradas e saídas de água, e a evapotranspiração de referência (ETo), em mm d-1, estimada pelo método de Penman-Monteith, preconizado pelo manual FAO-56. O consumo hídrico da cultura foi de 70,91 mm, 103 mm e 187 mm, correspondendo a um valor médio 1,03; 1,84 e 3,07 mm d-1 nos períodos de cultivos I, II e III, respectivamente. Observaram-se variações nos valores de Kc decorrentes das condições climáticas e das fases fenológicas da cultura. Os valores máximos e mínimos dos Kc foram 0,37-0,23; 0,60-0,27; 1,00-0,38 e 1,15-0,82 para as fases fenológicas I, II, III e IV, respectivamente. A estimativa do Kc em função do GD e do IC foram altamente significativas para a cultura nos três períodos de cultivos. Palavras-chave: coeficiente da cultura, Ocimum basilicum, evapotranspiração da cultura  MARQUES, P.A.A.; JOSÉ, J.V.; ROCHA, H.S.; FRAGA JR, E.F.;SOARES, D.A.; DUARTE, S.N.WATER CONSUMPTION OF BASIL USING DRAINAGE LYSIMETER  2 ABSTRACT Evaluation of water requirement and crop coefficient is of great importance for an appropriate irrigation management.  However, there has been lack of information  on   Basil crop.  The aim of this study was to evaluate water consumption of the basil crop and  estimate its crop coefficient (Kc), relating it to the sum of degree days (DD) and the vegetation index (VI).  A total of three drainage lysimeters were used, crop evapotranspiration (Etc) in mm d-1 was determined by inputs and outputs of water; reference evapotranspiration (ETo) in mm d-1 was estimated by the Penman-Monteith method, recommended by FAO-56. Water consumption of the crop was 70.91 mm, 103 mm and 187 mm, which corresponds to  mean values of 1.03; 1.84 and 3.07 mm d-1  in the cultivation periods I, II and III, respectively.  Variations in Kc values were observed as a result of the climate conditions and  phonological stages of the crop.  Maximum and minimum Kc values were  0.37-0.23; 0.60-0.27; 1.00-0.38 and  1.15-0.82 for the I, II, III and IV phonological stages , respectively .  The estimate of Kc as a function of DD and VI was highly significant for the crop in the three cultivation periods. Keywords: crop coefficient. Ocimum basilicum, crop evapotranspiration. 

scholarly journals DETERMINAÇÃO DO COEFICIENTE DE CULTIVO PARA A CULTURA DO RABANETE ATRAVÉS DE LISIMETRIA DE DRENAGEM

Irriga ◽  
2018 ◽  
Vol 22 (1) ◽  
pp. 194-203 ◽  
Author(s):  
Elvis Da Silva Alves ◽  
Dayane Farias Lima ◽  
José Adeilson Santos Barreto ◽  
Daniella Pereira dos Santos ◽  
Márcio Aurélio Lins dos Santos
Keyword(s):  
Water Consumption ◽  
Irrigation Management ◽  
Crop Evapotranspiration ◽  
Local Conditions ◽  
Stage Of Development ◽  
Experimental Area ◽  
Crop Water Consumption ◽  
Crop Coefficients ◽  
The City ◽  
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DETERMINAÇÃO DO COEFICIENTE DE CULTIVO PARA A CULTURA DO RABANETE ATRAVÉS DE LISIMETRIA DE DRENAGEM  ELVIS DA SILVA ALVES1; DAYANE FARIAS LIMA2; JOSÉ ADEILSON SANTOS BARRETO3; DANIELLA PEREIRA DOS SANTOS4 E MÁRCIO AURÉLIO LINS DOS SANTOS5 [1] Eng. Agrônomo, Doutorando em Engenharia Agrícola UFV/Viçosa – MG, e-mail: [email protected] Eng. Agrônoma, Mestranda em Engenharia Agrícola UFRPE/Recife – PE, e-mail: [email protected] Eng. Agrônomo, UFAL/Campus Arapiraca – AL, e-mail: [email protected] Eng. Agrônoma, Doutoranda em Engenharia Agrícola UFRPE/Recife – PE, e-mail: [email protected] Eng. Agrônomo, Professor UFAL/Campus Arapiraca – AL, e-mail: [email protected]  1        RESUMO O coeficiente de cultivo (Kc) está diretamente ligado as características fenológicas e fisiológicas das culturas. O grande problema em manejar a irrigação pelo método em que o relaciona com a Evapotranspiração de referência (ET0) está na obtenção de valores de Kc que sejam condizentes com as condições da localidade do cultivo. Apesar dos lisímetros de pesagem serem mais confiáveis, lisímetros de drenagem quando bem manejados permitem a obtenção de resultados confiáveis da evapotranspiração da cultura (ETc), que em razão com a ET0 resulta no Kc. Com isso, este trabalho teve como objetivo monitorar o consumo hídrico da cultura do rabanete para determinação dos coeficientes de cultivo no município de Arapiraca – AL, utilizando lisimetria de drenagem. O trabalho foi conduzido na área experimental do Campus de Arapiraca da Universidade Federal de Alagoas, onde foram instalados três lisímetros de drenagem em uma área experimental com dimensões de 5,00 x 2,00 m de comprimento e largura, respectivamente. A ETc foi determinada pelo método do balanço hídrico, e a ET0 pelo método de Penman Monteith-FAO. O monitoramento do consumo de água da cultura do rabanete para as condições locais da cidade de Arapiraca pode ser realizado de forma confiável através da lisimetria de drenagem. Os coeficientes de cultivo (Kc) do rabanete para Arapiraca determinados através deste trabalho foram de 0,45; 0,55; 0,95 e 0,65, para os estádios I, II, III e IV respectivamente. O estádio de desenvolvimento responsável pelo maior consumo hídrico do rabanete foi estádio III, com consumo de 15 mm. A evapotranspiração da cultura do rabanete durante todo o ciclo foi de 39 mm. Palavras-chave: Manejo de irrigação, evapotranspiração, consumo hídrico.  ALVES. E. S.; LIMA, D. F.; BARRETO, J. A. S.; SANTOS, D. P.; SANTOS, M. A. L.DETERMINATION OF CULTIVATION COEFFICIENT TO RADISH CULTURE USING DRAINAGE LYSIMETRY     2      ABSTRACT The cultivation coefficient (Kc) is directly connected to phenological and physiological characteristics of cultures. The major problem in managing the irrigation method that relates it to ET0 is in getting Kc values that are consistent with the conditions of the location of cultivation. Though weighing lysimeters are more reliable, drainage lysimeters when well managed allow the obtention of reliable results of crop evapotranspiration (ETc), which, in ration with  ET0 results in Kc. Therefore, this study aimed to monitor the radish crop water consumption for determining crop coefficients in the city of Arapiraca - AL, using drainage lysimeters. The work was conducted in the experimental area of Arapiraca Campus of the Federal University of Alagoas, where three drainage lysimeters were installed in an experimental area with dimensions of 5.00 x 2.00 m in length and width, respectively. The ETc was determined by the water balance method, and the ET0 Penman Monteith-FAO. The monitoring of water consumption of the radish culture for the local conditions of Arapiraca can be carried out reliably through drainage lysimetry. Crop coefficients (Kc) of Radish for Arapiraca determined by this study were 0.45; 0.55; 0.95 and 0.65, for stages I, II, III and IV respectively. The stage of development responsible for higher water consumption by radish was stage III, with consumption of 15 mm. The radish crop evapotranspiration throughout the cycle was 39 mm. Keywords: Irrigation management, evapotranspiration, water consumption.

scholarly journals Utilização do lisímetro de drenagem para obtenção do “Kc” da mamoneira em plantio adensado

2016 ◽  
Vol 11 (1) ◽  
pp. 08 ◽  
Author(s):  
W. L. Miranda ◽  
L. G. Carvalho ◽  
P. Castro Neto ◽  
P. A. B. Santos
Keyword(s):  
Water Deficit ◽  
Castor Bean ◽  
Considerable Increase ◽  
Reference Evapotranspiration ◽  
Irrigation Management ◽  
Crop Coefficient ◽  
Crop Evapotranspiration ◽  
Crop Cycle ◽  
Increase In Productivity ◽  
Drainage Lysimeter

<p>A cultura da mamona é considerada resistente a deficiências hídricas, no entanto, apresenta considerável incremento de produtividade quando submetida à irrigação. Para o adequado manejo da irrigação um dos critérios passíveis de serem adotados baseia-se na evapotranspiração da cultura (ETc) e para tanto torna-se necessário o conhecimento do valor do coeficiente de cultura (Kc). Com o presente trabalho objetivou-se determinar o Kc da mamoneira em plantio adensado, no período de safrinha, utilizando-se lisímetro de drenagem. Foram utilizados três lisímetros de drenagem, com dimensões de 1,2 m de comprimento, 1,4 m de largura e 1,2 m de profundidade. Nos lisímetros foram plantadas oito mudas de mamoneira da cultivar Al Guarany 2002 com espaçamento de 0,3 m entre plantas e 0,7 m entre linhas. A ETc foi contabilizada no intervalo de 5 a 12 dias, conforme se observou o fim da drenagem. A evapotranspiração de referência (ETo) foi estimada pela equação de Penman-Monteith-FAO. A partir da relação ETc/ETo obteve-se o Kc para os diferentes períodos ao longo do ciclo da cultura. Os valores de ETc encontrados nas fases inicial, de crescimento, intermediária e final foram 1,65; 3,07; 9,14 e 5,85 mm d<sup>-1</sup> respectivamente. Os valores de Kc para as fases mencionadas foram 0,98; 1,41; 2,11 e 1,65 respectivamente.</p><p align="center"><strong><em>Use of drainage lysimeter for obtaining Kc of castor bean in dense plantation</em></strong></p><p><strong>Abstract</strong><strong>: </strong>Castor bean culture is considered resistant to water deficit. However, it presents considerable increase in productivity when submitted to irrigation. For the adequate irrigation management, one of the criterion considered is based on the crop evapotranspiration (ETc) and is necessary for finding the crop coefficient (Kc) value. With the present work, we aimed at determining the Kc of the castor bean in dense plantation, during the off-season, using a drainage lysimeter. Three drainage lysimeters, with dimensions of 1.2 m of length, 1.4 m of width and 1.2 m of depth, were used. In the lysimeters, eight castor bean seedlings, cultivar Al Guarany 2002 were planted with spacing of 0.3 m between plants and 0.7 m between lines.  The ETc was calculated considering the interval from 5 to 12 days, according to the end of drainage. The reference evapotranspiration (ETo) was estimated by the Penman-Monteith-FAO equation. From the ETc/ETo relation, we obtained the Kc for the different periods over the crop cycle. The ETc values found in the initial, growing, intermediate and final phases were of 1.65; 3.07; 9.14 and 5.85 mm d<sup>-</sup><sup>1</sup>, respectively. The Kc values for the mentioned phases were of 0.98; 1.41; 2.11 and 1.65, respectively.</p>

scholarly journals Influence of Soil Coverage on Evapotranspiration and Dual Crop Coefficients on Soybean

2020 ◽  
pp. 111-125
Author(s):  
João Danilo Barbieri ◽  
Paulo Sérgio Lourenço de Freitas ◽  
Rivanildo Dallacort ◽  
Roberto Rezende ◽  
André Luiz Biscaia Ribeiro da Silva ◽  
...  
Keyword(s):  
Water Consumption ◽  
Irrigation Management ◽  
Main Tool ◽  
Crop Coefficient ◽  
Dry Mass ◽  
Initial Development ◽  
Evaporation Coefficient ◽  
Output Ratio ◽  
Crop Coefficients ◽  
Culture Development

Crop coefficient (Kc) study is the main tool used to determine the plant water consumption enabling irrigation management. The dual Kc is related to the evaporation coefficient of water from the soil (Ke), therefore, the objective of the work was to evaluate the influence of the soil coverage, in the variability of the crop evapotranspiration (ETc) of soybean and the dual Kc. The Kc values were determined by the ratio between ETc and ETo (reference evapotranspiration). ETo was estimated using the methodology proposed by Penman-Monteith FAO-56. The ETc values were obtained by the water input and output ratio of the weighing lysimeters system for the culture development phases established as initial; development; intermediate and final. The culture presented a cycle of 118 days for both treatments; the volume of the water precipitated and supplied by irrigation was 786.4 and 89 mm, respectively. The water consumption determined by ETc during the crop cycle was 699.10; 672.57; 649.06; 724.02; 643.46 and 638.12 mm, respectively for levels 0; 2; 4; 6; 8 and 10 t ha-1 of the dry mass of Brachiaria. The average dual Kc obtained was 1.60; 1.48; 1.40; 1.53; 1.42 and 1.47, respectively for coverings and a reduction in Kc was observed for treatments with soil coverage. Yield and development of the root system, were increase on soil coverage of 2 and 4 t  ha-1.

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