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 Sugar cane crop coefficient by the soil water balance method

2015 ◽  
Vol 10 (24) ◽  
pp. 2407-2414 ◽  
Author(s):  
Greco de Guimaraes Cardoso Gabriel ◽  
Campos de Oliveira Renato ◽  
Batista Teixeira Marconi ◽  
Sergio Dorneles Milton ◽  
Marcos Oliveira Domingos Romenig ◽  
...  
Keyword(s):  
Water Balance ◽  
Soil Water ◽  
Sugar Cane ◽  
Crop Coefficient ◽  
Balance Method ◽  
Soil Water Balance ◽  
Water Balance Method

scholarly journals Reference Evapotranspiration Assessment Techniques for Estimating Crop Water Requirement

2019 ◽  
Vol 8 (4) ◽  
pp. 1094-1100
Keyword(s):  
Reference Evapotranspiration ◽  
Climatic Factors ◽  
Crop Coefficient ◽  
Climatic Conditions ◽  
Water Requirement ◽  
Growth Stages ◽  
Climatic Data ◽  
Water Demands ◽  
Conventional Methods ◽  
The Impact

Water scarcity is a serious issue that has to be addressed in order to face the increasing water demands. Due to this issue, agricultural crops do not receive the required amount of water. So, it is necessary to have a proper technique to determine the water requirement for a particular crop. Evapotranspiration (ET), a process which is reliant on numerous climatic conditions, quantifies the loss of water from soil and crops through evaporation and transpiration processes respectively. Reference evapotranspiration ET is a concept of estimating ET from the reference surface which resembles an in-depth surface of green grass of stable height, actively growing, fully shading the surface with sufficient water. The amount of water required for a crop is thus determined by multiplying ETo with the crop coefficient (Kc) which depends on the growth stages and duration of a crop. So, evapotranspiration is considered to be one of the successful approaches to optimize the usage of water for crops. A literature survey is carried out on the popular methods of estimating ETo and their merits, demerits are discussed in this paper. Also, the impact of various climatic factors on ETo is presented. From the survey, it is known that ETo is estimated using conventional and non-conventional methods like Penman-Monteith, Blaney-Criddle, Hargreaves, ANN and WNN, regression and fuzzy logic. Humidity, temperature, wind speed, and solar radiation are the factors that have a major impact on estimating ETo. Generally, conventional methods are tedious since it requires experimental setups and more climatic data to determine ETo which are not available in many under developing countries. Thus, in this case, non-conventional methods are found to yield better results from the survey.

REFERENCE EVAPOTRANSPIRATION (ETO) IN TROPICAL FORESTED AREAS DETERMINED BY PENMAN-MONTEITH MODEL IN CROPWAT SOFTWARE

2016 ◽  
Vol 78 (9-4) ◽  
Author(s):  
Siti Aisah Shamsuddin ◽  
Maryam Jamilah Mohamed Amran
Keyword(s):  
Water Balance ◽  
Reference Evapotranspiration ◽  
Secondary Data ◽  
Balance Method ◽  
Research Station ◽  
Annual Average ◽  
Water Balance Method ◽  
Geographical Latitude ◽  
Forested Areas ◽  
Data Period

Reference evapotranspiration (ETₒ) was determined using the Penman-Monteith (P-M) combination equation established in the CROPWAT software v.8 (FAO 1992). The objective of the study is to determine the ETₒ at Bukit Tarek Experimental Watershed, Kerling, Selangor (BTEW), Matang Mangrove at Kuala Sepetang, Perak (MMP) and FRIM Mata Ayer Research Station, Perlis (MAP) using five-year periods of daily weather secondary data. Results showed that ETₒ of 4.10 mm/day at MMP was the highest compared to MAP (3.70 mm/day) and BTEW (3.58 mm/day). The geographical latitude influenced the ETₒ values. The ETo at BTEW was compared with the evapotranspiration (ET) calculated from water balance method which is also at the same location for data period from 1990 to 1994. Results showed that annual average ET was 1552 mm (56.1% of rainfall) while ETo was 43.9% of rainfall only. The annual averages of ET ranged from 3.92 to 4.69 mm day-1 with an average of 4.27 mm day-1. The annual average of ETo was underestimated ET from water balance method ranging from 16.6 to 26.2%. It is expected that the ETo found was underestimated as the actual evapotranspiration requires changes in canopy resistance as function of water availability

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 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 ESTIMATION OF CROP WATER REQUIREMENT AND CROP COEFFICIENT OF TOMATO CROP USING METEOROLOGICAL DATA IN PAMPAIDA MILLENNIUM VILLAGE, KADUNA STATE, NIGERIA

2020 ◽  
Vol 4 (3) ◽  
pp. 538-546
Author(s):  
A. Ahmed ◽  
M. A. Oyebode ◽  
H. E. Igbadun ◽  
Ezekiel Oiganji
Keyword(s):  
Soil Moisture ◽  
Water Use ◽  
Crop Coefficient ◽  
Water Requirement ◽  
Crop Water Requirement ◽  
Growth Stages ◽  
Crop Water ◽  
Tomato Crop ◽  
Crop Water Use ◽  
Crop Coefficients

This report presents a study of crop water requirement and crop coefficient (Kc) for Tomato crop cultivated under irrigation in Pampaida Millennium Village Cluster, Ikara Local Government Area of Kaduna State, Nigeria, during the 2009/2010 dry season. A total of 7 tomato farmers were selected out of 45 farmers for the assessment exercise. Water applied per irrigation and soil moisture contents before and after irrigation was monitored throughout the seasons, while Tomato bulbs were harvested at the end of season and weighed. Average  crop water use were estimated from the soil moisture content using the gypsum block, while daily reference Evapotranspiration (ETo) were computed from weather data using method Hargreaves equation. Crop coefficient values (Kc) were computed as the ratio of crop water use to ETo. The values of crop coefficients and seasonal crop water requirement per irrigation for different growth stages were determined, the computed *Kc values for different growth stage for the tomato crop grown in the study area was found to be between 0.77-1.15, the initial stage (*Kc =0.81; 20 mm/irrigation), crop development stage (*Kc = 1.09; 28 mm/irrigation), mid-season (*Kc = 1.15; 29 mm/ irrigation) and Late stage (*Kc = 0.77; 19 mm/irrigation), hence the mid-season gave the highest Kc value. However, the crop seasonal water requirement was found to be 386mm, which was within the recommended range. The crop coefficients and seasonal water requirement estimated in this study are reliable and could be used in irrigation design and scheduling for Tomato in the study area.

scholarly journals A worldwide evaluation of basin-scale evapotranspiration estimates against the water balance method

2016 ◽  
Vol 538 ◽  
pp. 82-95 ◽  
Author(s):  
Wenbin Liu ◽  
Lei Wang ◽  
Jing Zhou ◽  
Yanzhong Li ◽  
Fubao Sun ◽  
...  
Keyword(s):  
Water Balance ◽  
Balance Method ◽  
Water Balance Method ◽  
Basin Scale
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