The Values of Crop Coefficients and Bowen Ratio of Field Crops in Areas with Insufficient Precipitation in Central Europe

Pivec, J.; Brant, V.; Kroulík, M.; Škeříková, M.

doi:10.1002/ird.1903

Cited by 4 publications

(1 citation statement)

References 27 publications

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“…The main advantage of this method is that the assessment of ET 0 is based on meteorological data from reference stations, while k c values account for specific crop types and growing conditions. For several tropical fruits and crop species, such as apple (Marsal et al, 2013), kiwi fruit (Silva et al, 2008), Sorghum bicolor (Zábranský et al, 2015), maize (Zhang et al, 2013) and wheat (Yan et al, 2020; Zheng et al, 2020), k c values different from the FAO tabular values have been reported (Allen et al, 1998). However, studies on the crop coefficient of tea trees are rare for some special areas, even though the FAO has given a reference value of k c for tea trees.…”

Section: Introductionmentioning

confidence: 99%

Calibration and validation of three evapotranspiration models in a tea field in the humid region of south‐east China

Zhang

Yan

et al. 2022

Irrigation and Drainage

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Evapotranspiration (ETc) is the most important part of agricultural water consumption. Accurate determination of the ETc of tea trees is important in the water management of tea fields. In this study, three models, the Penman–Monteith (PM), Priestley–Taylor (PT) and crop coefficient (KC) models, were applied and calibrated using meteorological data of 2017 in a tea field. The calibrated models were validated using the Bowen ratio energy balance (BREB) method with the data of 2018 and 2019 in the tea field. The canopy resistance of the PM model was calibrated by the inverse method with the BREB‐measured ETc using the Katerji and Perrier (KP) submodel with R2 equal to 0.80. The annual mean value of the coefficient in the PT model (α = 1.03) was determined based on the BREB results and meteorological data. In addition, the crop coefficients of tea trees based on the measured ETc and reference evapotranspiration (ET0) were comprehensively evaluated, with values of 0.86, 1.19 and 0.96 at the three growth stages, showing a cyclical evolution within a year. The PT model performed best, with a root mean square error (RMSE) equal to 0.82 mm day−1 and a Nash–Sutcliffe efficiency (NSE) equal to 0.90. The PM model underestimated ETc with RMSE equal to 0.79 mm day−1 and NSE equal to 0.84, while the KC method overestimated ETc.

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Section: Introductionmentioning

confidence: 99%

Calibration and validation of three evapotranspiration models in a tea field in the humid region of south‐east China

Zhang

Yan

et al. 2022

Irrigation and Drainage

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New technologies and practical approaches to improve irrigation management of open field vegetable crops

Zinkernagel

Valero

Seresti

et al. 2020

Agricultural Water Management

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Water demands and biomass production of sorghum and maize plants in areas with insufficient precipitation in Central Europe

Škeříková¹,

Brant²,

Kroulík³

et al. 2018

PLANT SOIL ENVIRON

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Evapotranspiration and transpiration measurements represent a tool for the assessment of crop water demand. The aim of this study was to compare sorghum and maize with respect to its potential for forage production in areas with insufficient precipitation in Central Europe. The values of the actual evapotranspiration (ET<sub>a</sub>, Bowen ratio balance method), transpiration (sap flow method), leaf area index (LAI) and biomass production of sorghum and maize were measured continuously in years 2010–2012. Sorghum stand provided higher ET<sub>a</sub> in comparison with maize in dry year 2012. Maize produced consistently more above-ground biomass yield and lower LAI over all evaluated years than sorghum. The sorghum provided similar or higher water use efficiency (WUE) than maize during the period of intensive prolongation growth, however, the higher WUE did not result in higher biomass production.

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The Values of Crop Coefficients and Bowen Ratio of Field Crops in Areas with Insufficient Precipitation in Central Europe

Abstract: The aim of this study, based on measurements of actual evapotranspiration of vegetation, was to determine the values of the crop coefficient (K c ) for selected crops and the effect of growth on the dissipation of radiation energy. The actual evapotranspiration (ET a , mm day

Cited by 4 publications

References 27 publications

Calibration and validation of three evapotranspiration models in a tea field in the humid region of south‐east China

Calibration and validation of three evapotranspiration models in a tea field in the humid region of south‐east China

New technologies and practical approaches to improve irrigation management of open field vegetable crops

Water demands and biomass production of sorghum and maize plants in areas with insufficient precipitation in Central Europe

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