scholarly journals Determination of Crop Coefficient Values of Chili by Drainage Lysimeter

2020 ◽  
Keyword(s):  
Crop Coefficient ◽  
Drainage Lysimeter

scholarly journals EVAPOTRANSPIRAÇÃO E COEFICIENTE DE CULTIVO DO FEIJÃO-CAUPI CULTIVADO EM SOLO DO CERRADO SUBMETIDO À COBERTURA MORTA

Irriga ◽  
2018 ◽  
Vol 21 (1) ◽  
pp. 172 ◽  
Author(s):  
HIPÓLITO MURGA-ORRILLO ◽  
Wellington Farias Araújo ◽  
Paulo Roberto Ribeiro Rocha ◽  
Roberto Tadashi Sakazaki ◽  
Luiz Fernandes Silva Dionisio ◽  
...  
Keyword(s):  
Water Use ◽  
Vigna Unguiculata ◽  
Water Consumption ◽  
Developmental Stages ◽  
Crop Coefficient ◽  
Soil Conditions ◽  
Water Parameters ◽  
Mulch Cover ◽  
Drainage Lysimeter

EVAPOTRANSPIRAÇÃO E COEFICIENTE DE CULTIVO DO FEIJÃO-CAUPI CULTIVADO EM SOLO DO CERRADO SUBMETIDO À COBERTURA MORTA  HIPÓLITO MURGA-ORRILLO1; WELLINGTON FARIAS ARAÚJO2; PAULO ROBERTO RIBEIRO ROCHA3; ROBERTO TADASHI SAKAZAKI4; LUIZ FERNANDES SILVA DIONISIO5 E ANA ROSA POLO-VARGAS6  1Engenheiro Agrônomo, Prof. Invitado, Universidad Nacional de Cajamarca, (UNC), Av. Atahualpa Nº 1050- Carretera Cajamarca-Baños del Inca, Cajamarca, Perú. [email protected] Agrônomo, Prof. Dr. Associado da UFRR/CCA, Boa Vista, RR. [email protected] Agrônomo, Prof. Adjunto da UFRR/CCA, Boa Vista, RR. [email protected] Agrônomo, Doutorando na UFRR/CCA, Boa Vista, RR. [email protected] Florestal, Doutorando na UFRA, Belém, PA. [email protected] Agrônomo, Graduada na UNC, Av. Atahualpa Nº 1050- Carretera Cajamarca-Baños del Inca, Cajamarca, Perú. [email protected] 1        RESUMO O conhecimento dos parâmetros hídricos de uma cultura é fundamental para o incremento da produtividade sem o desperdício de água. Objetivou-se com o presente trabalho determinar a evapotranspiração (ETc) e o coeficiente de cultivo (Kc) da cultura de feijão-caupi (Vigna unguiculata L.) cv. Novaera, em condições de solo com e sem o uso de cobertura morta. O experimento foi conduzido no campus Cauamé da Universidade Federal de Roraima, em Boa Vista, RR, entre os meses de abril a julho de 2014. A evapotranspiração de cultivo (ETc) foi obtida por meio de lisímetro de drenagem. Os resultados evidenciaram que a ETc do feijão-caupi para ciclo da cultura sem e com cobertura morta foram de 311,0 e 260,4 mm, com valores médios de 3,5 e 3,0 mm dia-1, respetivamente. O estádio fenológico de maior demanda hídrica foi o reprodutivo atingindo valores de 5,4 mm dia-1 em solo sem cobertura e 4,9 mm dia-1 em solo com cobertura. Os Kc's pelos estádios de desenvolvimento, inicial (I), crescimento (II), reprodutivo (III), e final (IV) pelo método de Penman-Monteith foram equivalentes à 0,42; 0,82; 1,60 e 0,79 em solo sem cobertura morta, e 0,30; 0,73; 1,46 e 0,56 em solo com cobertura morta. Semelhante, o método de Jensen-Haise apresentou valores de 0,38; 0,76; 1,31 e 0,61 em solo sem cobertura morta e 0,29; 0,67; 1,19 e 0,42 em solo com cobertura morta. Palavras-chave: Vigna unguiculata. Otimização de uso de água. Consumo hídrico.  MURGA-ORRILLO, H.; ARAÚJO, W. F.; ROCHA, P. R. R.; SAKAZAKI, R. T.; DIONISIO, L. F. S; POLO-VARGAS, A. R.EVAPOTRANSPIRATION (ETc) AND CROP COEFFICIENT (Kc) OF COWPEA CROP IN SOIL WITH AND WITHOUT MULCH COVER IN THE RORAIMA SAVANNAH  2        ABSTRACT The determination of water parameters of a crop during its development is essential to maintain yield without wasting water. This study aimed to determine evapotranspiration (ETc) and crop coefficient (Kc) of cowpea crop (Vigna unguiculata L.) cv. Novaera during the various stages of development in soil conditions with and without mulch. The experiment was conducted in Cauamé, campus of the Federal University of Roraima, from April to July 2014, Boa Vista, Roraima state. Evapotranspiration cultivation (ETc) was obtained by drainage lysimeter, while the evapotranspiration reference (ETo) was estimated by Penman-Monteith and Jensen-Haise methods. The results determined that water consumption of cowpea in soil conditions with and without mulch were 311.0 and 260.4 mm, respectively. For Kc's developmental stages, initial (I), growth (II), reproductive (III), and final (IV), Penman-Monteith method showed values of 0.42, 0.82, 1.60, and 0.79 in soil without mulch, and 0.30, 0.73, 1.46, and 0.56 in soil with mulch, although the Jensen-Haise method showed values of 0.38, 0.76, 1.31 and 0.61 in soil with mulch and 0.29, 0.67, 1.19, and 0.42 in soil with mulch. Keywords: Vigna unguiculata. Optimization of water use. Water consumption 

Determination of evapotranspiration and basal crop coefficient of alfalfa with a weighing lysimeter

2006 ◽  
Vol 81 (3) ◽  
pp. 358-370 ◽  
Author(s):  
Bogachan Benli ◽  
Suleyman Kodal ◽  
Adem Ilbeyi ◽  
Haluk Ustun
Keyword(s):  
Crop Coefficient ◽  
Weighing Lysimeter

scholarly journals Determination of Crop Co-efficient Values of Soybean (Glycine max [L.] Merrill) by Lysimeter Study

2017 ◽  
Vol 14 (2) ◽  
pp. 14-23
Author(s):  
A J Mila ◽  
A R Akanda ◽  
K K Sark
Keyword(s):  
Climatic Condition ◽  
Agricultural Research ◽  
Local Level ◽  
Crop Coefficient ◽  
Regional Level ◽  
Crop Evapotranspiration ◽  
Agricultural Research Institute ◽  
Initial Development ◽  
Crop Variety

Local level calibration of crop coefficient (Kc) values is critical for regional level planning and allocation of water resources for irrigation. In this regard, an experiment was conducted at the Irrigation and Water Management Division of Bangladesh Agricultural Research Institute (BARI), Gazipur, in order to estimate crop coefficient values of soybean under the local climatic condition. An improved crop variety- BARI Soybean-6 was used in this experiment. The crop was grown under four irrigation treatments, allowing irrigation at an interval of 10, 15, 20 and 25 days. The treatments were so designed that drainage was allowed between the consecutive irrigations. Irrigation at 15 days interval produced the highest seed yield of 1.26 t/ha and was considered to be suitable for estimating seasonal crop evapotranspiration (ETc) and Kc values. The seasonal highest cumulative ETc was 308.43 mm under this treatment. The Kc values of soybean at initial, development, mid-season and late season stages were found as 0.67, 1.46, 1.59 and 0.62, respectively.The Agriculturists 2016; 14(2) 14-23

Determination of a crop coefficient for evapotranspiration in a sparse sorghum field

2006 ◽  
Vol 55 (2) ◽  
pp. 165-175 ◽  
Author(s):  
Tomomichi Kato ◽  
Makio Kamichika
Keyword(s):  
Crop Coefficient

scholarly journals Micrometeorological modeling and water consumption of tabasco pepper cultivated under greenhouse conditions

2021 ◽  
pp. 21-36
Author(s):  
Sérgio Weine Paulino Chaves ◽  
Rubens Duarte Coelho ◽  
Jéfferson De Oliveira Costa ◽  
Sergio André Tapparo
Keyword(s):  
Water Consumption ◽  
Crop Coefficient ◽  
Outdoor Environment ◽  
Production Cycle ◽  
Class A ◽  
Outdoor Environments ◽  
Irrigated Crops ◽  
Total Crop ◽  
The University

Micrometeorological variables of tabasco pepper cultivated under greenhouse and drip irrigated conditions have not been presented to date in literature, especially the water consumption of these plants, in terms of crop evapotranspiration (ETc) and crop coefficient (Kc). The determination of these variables is extremely important for the application of the correct amount of water to irrigated crops in these environments because PM FAO (56) standard methodology was idealized for outdoor environments. The objective of this work was to develop models of estimation of micrometeorological variables in greenhouse conditions and to determine the water demand, in terms of evapotranspiration (ET) and Kc, of the pepper (Capsicum frutescens L.), cv. Tabasco McIlhenny, drip irrigated using drainage lysimeters. The research was carried out in an experimental area located at the University of Sao Paulo (USP) in Piracicaba, SP, Brazil. The following micrometeorological variables were monitored: air temperature, air relative humidity (digital thermohygrometer) and evaporation (mini-pan) (EMT). Drainage lysimeters were used to obtain the ETc and the reference evapotranspiration (ETo) was estimated outside the greenhouse by the Penman Monteith (EToPM), Hargreaves and Samani (EToHS) methods and the class “A” pan method (ECA). It was concluded that the total value of mini-pan evaporation (EMT) inside the greenhouse was practically equal to EToPM, 5% lower than EToHS and 31% higher than ECA in the outdoor environment. ET values ranged from 0.28 to 2.42 mm day-1 and total crop ET was 446.43 mm. The Kc values for the first pepper production cycle were: 0.17 in the initial phase, 0.76 in the flowering and fruiting phase and 0.39 in the harvest phase, for the second production cycle, the value of Kc was 0.50 at the harvest phase.

scholarly journals Determination of Wheat Growth, Crop Coefficient (KC) and Water Stress Coefficient (Ks) under Different Salinity

2016 ◽  
Author(s):  
Meysam Abedinpour
Keyword(s):  
Water Stress ◽  
Crop Coefficient ◽  
Crop Growth ◽  
Growth Patterns ◽  
Wheat Crop ◽  
Growth Stages ◽  
Stress Coefficient ◽  
Salinity Levels ◽  
Water Stress Coefficient

A field experiment was conducted for determination of crop coefficient (KC) and water stress coefficient (Ks) for wheat crop under different salinity levels, during 2015-16. Complete randomized block design of five treatments were considered, i.e., 0.51 dS/m (fresh water) as a control treatment and other four saline water treatments (4, 6, 8 and 10 dS/m), for S1, S2, S3 and S4 with three replications. The results revealed that the water consumed by plants during the different crop growth stages follows the order of FW>S1>S2>S3>S4 salinity levels. According to the obtained results, the calculated values of crop coefficients significantly differed from those suggested by FAO No.56 for the crops. The Ks values clearly differ from one stage to another because the salt stress causes both osmotic stress, due to a decrease in the soil water potential, and ionic stress which the average values of water stress coefficient (Ks) follows this order; FW(1.0)=S1(1.0)>S2(1.0)>S3(0.93)>S4(0.82). Overall, it was found the differences are attributed primarily to specific cultivar, the changes in local climatic conditions and seasonal differences in crop growth patterns. Thus, further studies are essential to determine the crop coefficient values under different variables, to make the best management practice (BMP) in agriculture.

Determination of the potential evapotranspiration and crop coefficient for saffron using a water-balance lysimeter

2011 ◽  
Vol 57 (7) ◽  
pp. 727-740 ◽  
Author(s):  
N. Yarami ◽  
A. A. Kamgar-Haghighi ◽  
A. R. Sepaskhah ◽  
Sh. Zand-Parsa
Keyword(s):  
Water Balance ◽  
Potential Evapotranspiration ◽  
Crop Coefficient
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