scholarly journals Evapotranspiration and Dual Crop Coefficient of Maize Second Season Intercropped with Crotalaria

2020 ◽  
pp. 142-157
Author(s):  
Diego Fernando Daniel ◽  
Rivanildo Dallacort ◽  
João Danilo Barbieri ◽  
Marco Antônio Camillo de Carvalho ◽  
Santino Seabra Júnior ◽  
...  
Keyword(s):  
Developmental Stages ◽  
Crop Coefficient ◽  
The State ◽  
State University ◽  
Crop Evapotranspiration ◽  
Maize Crop ◽  
Evaporation Coefficient ◽  
Mato Grosso ◽  
Weight Variation ◽  
Phenological Phases

The objective of this work was to determine the dual coefficient of culture (Kc) of maize in monoculture and intercropping systems, as well as to evaluate the influence of intercropping on evapotranspiration and productive characteristics of maize second season. The experiment was carried out in the experimental field of the State University of Mato Grosso - UNEMAT in 2018, with three treatments: T1 - maize monoculture; T2 - Crotalaria monoculture and T3 - maize + Crotalaria. The crop evapotranspiration (ETc) of maize, Crotalaria, and maize + Crotalaria intercropping was determined daily by weight variation of weighing lysimeters, converted into mm day-1. The methodology used was that of dual Kc - FAO 56, dividing the crop coefficient (Kc), in soil evaporation coefficient (Ke), determined in microlysimeters, and basal crop coefficient (Kcb), determined in weighing lysimeters. The phenological phases of the maize crop were observed to determine the coefficients in the different developmental stages, being the Kc, Kcb, Ke in the phases: Initial (I), Development (II), Intermediate (III) and Final (IV). The accumulated culture evapotranspiration was 312.00; 436.16 and 422.38 mm and daily averages of 2.86; 4.00- and 3.88-mm d-1, respectively for monoculture maize, for Crotalaria and for intercropping. The Kc values for each phase of maize development in intercropping with crotalaria were: I (1.46); II (1.48); III (1.59) and IV (0.94). For maize monoculture, dual Kc values were: I (1.24), II (1.30), III (1.00) and IV (1.11) and for Crotalaria monoculture were: I (1.77), II (1.59), III (1.56) and IV (1.05).

scholarly journals Spatio-temporal variability of biophysical parameters of irrigated maize using orbital remote sensing

2021 ◽  
Vol 42 (4) ◽  
pp. 2181-2202
Author(s):  
Taiara Souza Costa ◽  
◽  
Robson Argolo dos Santos ◽  
Rosângela Leal Santos ◽  
Roberto Filgueiras ◽  
...  
Keyword(s):  
Vegetation Index ◽  
Normalized Difference Vegetation Index ◽  
Crop Coefficient ◽  
Coefficient Of Determination ◽  
Landsat 8 ◽  
Crop Evapotranspiration ◽  
Biophysical Parameters ◽  
Planting Dates ◽  
Maize Crop ◽  
Spatio Temporal

This study proposes to estimate the actual crop evapotranspiration, using the SAFER model, as well as calculate the crop coefficient (Kc) as a function of the normalized difference vegetation index (NDVI) and determine the biomass of an irrigated maize crop using images from the Operational Land Imager (OLI) and Thermal Infrared (TIRS) sensors of the Landsat-8 satellite. Pivots 21 to 26 of a commercial farm located in the municipalities of Bom Jesus da Lapa and Serra do Ramalho, west of Bahia State, Brazil, were selected. Sowing dates for each pivot were arranged as North and South or East and West, with cultivation starting firstly in one of the orientations and subsequently in the other. The relationship between NDVI and the Kc values obtained in the FAO-56 report (KcFAO) revealed a high coefficient of determination (R2 = 0.7921), showing that the variance of KcFAO can be explained by NDVI in the maize crop. Considering the center pivots with different planting dates, the crop evapotranspiration (ETc) pixel values ranged from 0.0 to 6.0 mm d-1 during the phenological cycle. The highest values were found at 199 days of the year (DOY), corresponding to around 100 days after sowing (DAS). The lowest BIO values occur at 135 DOY, at around 20 DAS. There is a relationship between ETc and BIO, where the DOY with the highest BIO are equivalent to the days with the highest ETc values. In addition to this relationship, BIO is strongly influenced by soil water availability.

Desenvolvimento Regional e a Expansão do Ensino Superior Público: o Caso da Universidade do Estado de Mato Grosso

2018 ◽  
Vol 19 (1) ◽  
pp. 52 ◽  
Author(s):  
Julio Cezar De Lara ◽  
Monica Franchi Carniello
Keyword(s):  
Higher Education ◽  
Regional Growth ◽  
Study Data ◽  
The State ◽  
Exploratory Research ◽  
State University ◽  
Mato Grosso ◽  
Accelerated Growth ◽  
The University

Sabe-se que a educação é uma das circunstâncias necessárias para que haja transformação na vida e no ambiente das pessoas e com a educação superior, em expansão e crescimento acelerado no Brasil, vivencia-se um novo aspecto, o crescimento local e regional das cidades. Partindo destes pressupostos, este artigo procurou verifcar qual foi a expansão do Ensino Superior no Estado de Mato Grosso, analisando os dados da Universidade do Estado de Mato Grosso (Unemat) e de que forma a expansão proporcionou o desenvolvimento dos municípios. A pesquisa se caracteriza como uma pesquisa exploratória, de abordagem quantitativa, com a realização de um estudo de caso. Foram analisados dados de dois censos do Instituto Brasileiro de Geografa e Estatística (IBGE): 2000 e 2010 e constatou-se, com os dados coletados, que a Unemat aumentou o número de cursos e o número de vagas no decorrer da década, demonstrando indícios de contribuição no aumento do PIB e do IDHM dos municípios em que a universidade atua.Palavras-chave: Educação. Universidade. Desenvolvimento Regional.AbstractIt is known that education is one of the conditions necessary for any change in peoples’ life and environment and with higher education in expansion and accelerated growth, Brazil has been experiencing a new aspect , the cities ‘local and regional growth. Based on these assumptions, this article aimed to fnd what the expansion of higher education in the state of Mato Grosso was, analyzing the data of the State University of Mato Grosso (Unemat) and how the expansion enabled the municipalities’ development. The research is characterized as an exploratory research with a quantitative approach, with the completion of a case study. Data were analyzed from two censuses of the Brazilian Institute of Geography and Statistics (IBGE): 2000 and 2010 and found out with the data collected that Unemat increased the number of courses and the number of jobs during the decade demonstrating evidence of contribution to increases in GDP and IDHM of the municipalities in which the university operates.Keywords: Education. University. Regional Development.

scholarly journals INTERACTIONS OF BIOCHAR AND ORGANIC COMPOUND FOR SEEDLINGS PRODUCTION OF Magonia pubescens A. St.-Hil.

2015 ◽  
Vol 39 (4) ◽  
pp. 655-661 ◽  
Author(s):  
Stefany Lorrayny Lima ◽  
Suelen Tamiozzo ◽  
Edwin Camacho Palomino ◽  
Fabiano André Petter ◽  
Ben Hur Marimon-Junior
Keyword(s):  
Organic Compound ◽  
Quality Index ◽  
The State ◽  
Cattle Manure ◽  
State University ◽  
Mato Grosso ◽  
Randomized Design ◽  
Completely Randomized Design ◽  
Dickson Quality Index

ABSTRACTThe objective of this study was to test the hypothesis that biochar, applied with cattle manure, promotes better development of seedlings of Magonia pubescens St. Hil. The experiment was conducted at the State University of Mato Grosso, Nova Xavantina, Brazil, in 2011. We used a completely randomized design, with twelve treatments and three replications. The substrates formed by the higher levels of cattle manure plus biochar (30%) provided better results of height, diameter and aerial biomass. However, the Dickson Quality Index has not confirmed the quality of seedlings in these treatments. We also observed that the doses of biochar (20 and 30%) when added separately to the Latosol, are not efficient for the growth improvement of the seedlings. Based on the present results, we validate the hypothesis that substrates formed with a mixture of cattle manure and biochar are effective to improve the production of seedlings of M. pubescens.

scholarly journals COEFICIENTE DUAL DE CULTIVO DO MILHO PIPOCA EM TANGARÁ DA SERRA – MT

Irriga ◽  
2019 ◽  
Vol 24 (3) ◽  
pp. 473-485
Author(s):  
Cleonir Andrade Faria Junior ◽  
Rivanildo Dallacort ◽  
Paulo Sérgio Lourenço de Freitas ◽  
João Danilo Barbieri ◽  
Roberto Rezende ◽  
...  
Keyword(s):  
Zea Mays ◽  
Zea Mays L ◽  
Potential Evapotranspiration ◽  
Crop Coefficient ◽  
Sprinkler System ◽  
State University ◽  
Mato Grosso ◽  
Uniformity Coefficient ◽  
Culture Cycle ◽  
Red Latosol

COEFICIENTE DUAL DE CULTIVO DO MILHO PIPOCA EM TANGARÁ DA SERRA – MT     CLEONIR ANDRADE FARIA JUNIOR1; RIVANILDO DALLACORT2; PAULO SERGIO LOURENÇO DE FREITAS3; JOÃO DANILO BARBIERI4; ROBERTO REZENDE5 E WILLIAM FENNER6   1Doutorado no Programa de Pós-Graduação em Agronomia, Universidade Estadual De Maringá, Av. Colombo, nº 5790 – Zona 07, bloco j45, 2º piso, CEP - 87020-900, Maringá/PR/Brasil, [email protected] 2Professor do Programa de Pós-Graduação em Ambiente e Sistema de Produção Agrícola, Universidade do Estado de Mato Grosso, Rodovia MT  358, Km 07 (s/n) – Jardim Aeroporto, CEP: 78300-000, Tangará da Serra/MT/Brasil, [email protected] 3Professor no Programa de Pós-Graduação em Agronomia, Universidade Estadual De Maringá, Av. Colombo, nº 5790 – Zona 07, bloco j45, 2º piso, CEP - 87020-900, Maringá/PR/Brasil, [email protected] 4Doutorando no Programa de Pós-Graduação em Agronomia, Universidade Estadual De Maringá, Av. Colombo, nº 5790 – Zona 07, bloco j45, 2º piso, CEP - 87020-900, Maringá/PR/Brasil, [email protected] 5Professor no Programa de Pós-Graduação em Agronomia, Universidade Estadual De Maringá, Av. Colombo, nº 5790 – Zona 07, bloco j45, 2º piso, CEP - 87020-900, Maringá/PR/Brasil, [email protected] 6Doutor no programa de Pós-Graduação em Agricultura Tropical, Universidade Federal de Mato Grosso, Av. Fernando Corrêa da Costa, nº 2367, Bairro Boa Esperança, CEP – 78060-900, Cuiabá/MT/Brasil. [email protected]     1      RESUMO   O objetivo deste trabalho foi determinar o coeficiente duplo da cultura do milho pipoca para o município de Tangará da Serra - MT, utilizando lisímetros de pesagem. O experimento no campus da Universidade do Estado de Mato Grosso- UNEMAT, sendo o solo classificado como Latossolo Vermelho distroférrico, com textura muito argilosa. A semeadura foi realizada no dia 02/05/2015, nos seis lisímetros de pesagem, previamente calibrados com coeficientes de determinação acima de 0,99, para a bordadura foi utilizada uma semeadora de plantio direto, com espaçamento entre linhas de 0,45 m, a colheita foi realizada manualmente no dia 16/08/2015. As irrigações foram realizadas conforme a evapotranspiração potencial calculada diariamente pelos lisímetros e irrigados quando necessário por sistema de aspersão composto de 6 aspersores, com coeficiente de uniformidade de distribuição de 86%. Durante o desenvolvimento da cultura foram medidos diariamente a variação de massa dos microlisímetros por meio de pesagem, determinando a evaporação de água no solo em todas as fases da cultura. Durante o ciclo da cultura a temperatura média foi de 24,5°C e um aporte hídrico total de 571,4 mm. Os valores médios de Kcb obtidos na fase inicial, pleno desenvolvimento e maturação, foram de 0,7, 1,10 e 0,3 respectivamente.   Palavras-Chave: evapotranspiração, Zea mays L. subsp. everta, lisímetro de pesagem.     FARIA JUNIOR, C. A.; DALLACORT, R.; FREITAS, P. S. L. DE; BARBIERI, J. D.; REZENDE, R.; FENNER, W. DUAL CROP COEFFICIENT OF MAIZE CORN OF TANGARÁ DA SERRA – MT     2      ABSTRACT   The objective of this work was to determine the double coefficient of maize corn crop for the municipality of Tangará da Serra - MT, using weighing lysimeters. The experiment was conducted in State University of Mato Grosso – UNEMAT’s campus, and the soil was classified as dystroferric Red Latosol, with very clayey texture. Sowing was carried out on May 2, 2015, in the six weighing lysimeters, previously calibrated with determination coefficients above 0.99. For the border, a no-till seeding with row spacing of 0.45 m was used. Harvest was performed manually on 08/16/2015. Irrigations were performed according to the potential evapotranspiration calculated daily by the lysimeters and irrigated when necessary by a sprinkler system composed of 6 sprinklers, with distribution uniformity coefficient of 86%. During the development of the culture, mass variation of microlysimeters was measured daily by weighing, determining the evaporation of water in the soil in all phases of the culture. During the culture cycle the average temperature was 24.5 ° C and the total water supply was 571.4 mm. The average Kcb values obtained in the initial phase, full development and maturation phases were 0.7, 1.10 and 0.3 respectively.   Keywords: evapotranspiration, zea mays l. subsp. everta, weighing lysimeter.

scholarly journals Evapotranspiration and crop coefficients in two irrigated wheat cultivars

2020 ◽  
Vol 24 (4) ◽  
pp. 252-257
Author(s):  
Tonny J. A. da Silva ◽  
Edna M. Bonfim-Silva ◽  
William Fenner ◽  
Thiago F. Duarte ◽  
Jefferson V. José ◽  
...  
Keyword(s):  
Soil Water ◽  
Mass Difference ◽  
Crop Coefficient ◽  
Water Evaporation ◽  
Wheat Crop ◽  
Wheat Cultivars ◽  
Evaporation Coefficient ◽  
Mato Grosso ◽  
Irrigated Wheat ◽  
Crop Coefficients

ABSTRACT In the state of Mato Grosso, Brazil, wheat is an alternative to the current production system, mainly in irrigated crops, with new cultivars improved for this environment and system. The objective was to determine the evapotranspiration of the irrigated wheat crop and the dual coefficients of cultivars for the Brazilian Midwest. The experiment was conducted in the field using 12 weighing lysimeters and mini-lysimeters, filled by soil monoliths. The wheat cultivars BRS-254 and BRS-394 were used in the first and second years, respectively. Reference evapotranspiration was obtained by the Penman-Monteith equation and crop evapotranspiration by the mass difference in the lysimeters. Basal crop coefficient and soil water evaporation coefficient were determined according to the crop development stages in both years of cultivation. The mean ETc and ETo values were 3.87, 3.49 mm d-1 and 4.10 and 3.23 mm d-1, respectively, in the first and second cultivation cycles, with higher values of ETc recorded in the reproductive stages of the crop, flowering and grain filling. The basal crop coefficients and soil water evaporation coefficients estimated by weighing lysimeters composed of soil monoliths are: Kcb - 0.42, 0.78, 0.94, 0.74 and 0.47 and Ke - 0.72, 0.52, 0.39, 0.58 and 0.13 for the cultivar BRS-254, and Kcb - 0.28, 0.27, 0.65, 0.98 and 0.66 and Ke - 1.04, 0.96, 0.65, 0.34 and 0.51 for the cultivar BRS-394, at the stages of emergence, tillering, flowering, maturation and harvest, respectively.

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 Dual crop coefficient of common bean in Tangará da Serra, Mato Grosso

2016 ◽  
Vol 20 (5) ◽  
pp. 455-460 ◽  
Author(s):  
William Fenner ◽  
Rivanildo Dallacort ◽  
Paulo S. L. de Freitas ◽  
Cleonir A. Faria Júnior ◽  
Marco A. C. de Carvalho ◽  
...  
Keyword(s):  
Common Bean ◽  
Potential Evapotranspiration ◽  
Irrigation System ◽  
Sprinkler Irrigation ◽  
Crop Coefficient ◽  
Evaporation Coefficient ◽  
Mato Grosso ◽  
Crop Cycle ◽  
Common Bean Cultivar ◽  
Coefficient Of Uniformity

ABSTRACT This study aimed to determine the dual crop coefficient of common bean ( Phaseolus vulgaris L.) for Tangará da Serra-MT, Brazil. The study used the FAO-56 dual kc method, dividing the kc into soil evaporation coefficient (ke), determined in microlysimeters, and basal crop coefficient (kcb), determined in weighing lysimeters. The study was conducted from July 10 (sowing) to October 6, 2014 (harvest), using the common bean cultivar 'BRS Estilo' and a sprinkler irrigation system with a coefficient of uniformity greater than 80%. The total rainfall and irrigation during the crop cycle (84 days) was 524.8 mm; the potential evapotranspiration (ETo) estimated for the period was 327.9 mm, whereas the crop evapotranspiration (ETc) accumulated during the cycle, determined in lysimeters, was equal to 477.5 mm. The kcb values determined for the initial, full development and final stages were 0.32, 1.10 and 0.81, respectively, while for ke, the respective values were 0.85, 0.40 and 0.53.

scholarly journals Formation of beetroot seedlings in different protected environments, substrates and containers in Aquidauana region, State of Mato Grosso do Sul, Brazil

2012 ◽  
Vol 32 (3) ◽  
pp. 415-422 ◽  
Author(s):  
Letícia C. de Oliveira ◽  
Edilson Costa ◽  
Julissandra A. da S. Cortelassi ◽  
Edson T. Rodrigues
Keyword(s):  
Analysis Of Variance ◽  
The State ◽  
Joint Analysis ◽  
State University ◽  
Coconut Fiber ◽  
Mato Grosso ◽  
Individual Analysis ◽  
Randomized Design ◽  
Completely Randomized Design ◽  
Mato Grosso Do Sul

This study with beetroot seedlings, cultivar Top Tall Early Wonder, was carried out at the State University of Mato Grosso do Sul (UEMS/Aquidauana), from October to November 2008. Three environments of cultivation were used: greenhouse; nursery with monofilament screen of 50 % of shading; and nursery with aluminized thermal reflective screen of 50% of shading. In these environments, three polystyrene trays of 72, 128 and 200 cells, filled with four substrates, were tested: soil; Plantmax®; coconut fiber and vermiculite. There were no replication environments and then each one was considered an experiment alone. For each environment, it was adopted a completely randomized design in factorial scheme 3x4 (three trays x four substrates), with four replications, performing individual analysis of variance and joint analysis of experiments for environment comparisons. The monofilament screen is the best environment for seedlings produced in tray of 72 cells, and the greenhouse was the best environment for seedlings produced in trays of 128 cells. The best seedlings were formed in the tray of 72 cells. Vermiculite was the best substrate.

scholarly journals CONSUMO HÍDRICO E COEFICIENTE DE CULTIVO DA MAMONEIRA, CULTIVAR BRS ENERGIA

Irriga ◽  
2015 ◽  
Vol 20 (3) ◽  
pp. 429-444
Author(s):  
José Marcelo Dias ◽  
Pedro Vieira de Azevedo ◽  
José Renato Cortez Bezerra ◽  
Napoleão Esberard de Macêdo Beltrão ◽  
Geraldo Dos Santos Oliveira ◽  
...  
Keyword(s):  
Castor Bean ◽  
Field Experiments ◽  
Ricinus Communis ◽  
Phase 1 ◽  
Crop Coefficient ◽  
Bowen Ratio ◽  
Crop Evapotranspiration ◽  
Early Maturity ◽  
Mean Values ◽  
Phenological Phases

CONSUMO HÍDRICO E COEFICIENTE DE CULTIVO DA MAMONEIRA, CULTIVAR BRS ENERGIA  JOSÉ MARCELO DIAS1; PEDRO VIEIRA DE AZEVEDO2; JOSÉ RENATO CORTEZ BEZERRA3; NAPOLEÃO ESBERARD DE MACÊDO BELTRÃO3; GERALDO DOS SANTOS OLIVEIRA3 E MARIA IDALINE PESSOA CAVALCANTI4 1Embrapa Produtos e Mercado, [email protected],2Centro de Tecnologia e Recursos Naturais – UFCG, [email protected] Algodão, [email protected]; [email protected] de Ciências Agrárias – UFPB, [email protected].  1 Resumo O presente trabalho objetivou a determinação das exigências hídricas da mamoneira cultivada sob irrigação. Os experimentos de campo foram conduzidos na Estação Experimental da Embrapa Algodão, localizada em Barbalha – CE, nos anos de 2005 e 2006. A cultivar utilizada foi a BRS Energia, de ciclo precoce e porte baixo com 107 dias de ciclo, composto de 5 fases fenológicas: I - Germinação até 10% de cobertura do solo; II - Até inflorescência do 1º cacho; III - Até inflorescência do 2º cacho; IV - Maturação do 1º cacho; V - Maturação do 2º cacho, em uma área de 1 hectare. A estimativa da evapotranspiração da cultura (ETc), para as diferentes fases fenológicas, foi obtida pelo método do balanço de energia baseado na razão de Bowen. O coeficiente de cultivo (Kc) foi obtido pela relação entre a evapotranspiração da cultura (ETc) e a evapotranspiração de referência (ETo), estimada pelo método FAO-Penman-Monteith. A evapotranspiração média para os dois anos de cultivo foi de 565,1 mm, com um consumo mínimo de 47,4 mm na fase I e um máximo de 212.3 mm na fase IV. Os valores médios de Kc por fase fenológica foram de 0,74; 0,93; 1,00; 1,18 e 0,92. O Kc pode ser definido em função dos dias após a emergência, pela equação Kc = -0,0001DAE2 + 0,016DAE + 0,556.  Palavras-chave: Ricinus communis, evapotranspiração,  razão de Bowen.  DIAS, J. M.; AZEVEDO, P. V. de; BEZERRA, J. R. C.; BELTRÃO, N. E.de M.; OLIVEIRA, G. dos S.; CAVALCANTI, M. I. P.WATER CONSUMPTION AND CROP COEFFICIENT OF CASTOR BEAN CROP, CV. BRS ENERGIA  2 ABSTRACT The objective of this study was to determine   water requirement of castor bean under irrigation. Field experiments were conducted at the Experimental Station of Cotton Embrapa in Barbalha city, Ceará State, Brazil in 2005 and 2006.  With  early maturity and low height, cv. BRS Energia  was used,  107-day cycle, consisting of five phenological phases:  I- germination up to 10% soil covering; II- up to  inflorescence of the first bunch; III- up to inflorescence of the second bunch; IV- up to maturation of the first bunch; V- up to maturation of the second bunch,  in 1 hectare area.  The estimate of crop evapotranspiration for the phenological phases throughout the crop cycle was obtained by the Bowen-ratio energy balance.  Crop coefficient (Kc) was obtained by the ratio between crop evapotranspiration (Etc) and reference evapotranspiration (ETo), estimated by the  FAO-Penmam-Monteith method.  The mean evapotranspiration for the 2 year-cultivation period was 565.1 mm, being 47.4 mm minimum consumption   in phase 1 and 212.3 mm maximum consumption in phase IV.   Mean values of Kc by  phenological phase were 0.74; 0.93; 1.00; 1.18 and 0.92. Kc was defined as a function of days after emergence (DAE) by the equation Kc = -0.0001DAE2   + 0.016DAE + 0.556. Keywords: Ricinus communis, evapotranspiration, Bowen ratio.

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