COMPARISON OF SHUTTLEWORTH-WALLACE AND DUAL CROP COFFICIENT MODELS FOR ESTIMATING EVAPOTRANSPIRATION OF TRANSPLANTED COTTOON UNDER DIFFERENT IRRIGATION METHODS

文献类型： 外文期刊

第一作者： Zhang, Hao

作者： Zhang, Hao;Wang, Shunsheng;Guo, Xuan;Gong, Xuewen;Zhang, Hao;Liu, Hao;Sun, Jingsheng

作者机构：

关键词： Border irrigation; Surface drip irrigation; Micro-sprinkling hose irrigation; Soil evaporation; Simulation

期刊名称：FRESENIUS ENVIRONMENTAL BULLETIN （ 影响因子：0.489； 五年影响因子：0.479 ）

ISSN： 1018-4619

年卷期： 2019 年 28 卷 11 期

页码：

收录情况： SCI

摘要： Accurate determination for the daily evapotranspiration (ET) of transplanted cotton is important for optimizing fiber quality and improving water use efficiency. This study compared the daily ET of transplanted cotton simulated by Shuttleworth-Wallace (SW) and dual crop coefficient (DKc) models. The performances of these two models were evaluated with the calculations of ET by soil water balance method and the measurements of soil evaporation (E) by micro-lysimeter. Results showed that the daily E simulated by SW model was better than that simulated by DKc model; the DKc model underestimated the daily E, especially in the boll-forming and boll-opening stages of transplanted cotton. The calculations of ET in the whole growth period of transplanted cotton for border irrigation (BI), surface drip irrigation (SDI) and micro-sprinkling hose irrigation (MHI) were 527 mm, 485 mm and 510 mm, respectively. The SW method had better estimate of daily ET than DKc model; the root mean square error (RMSE), average absolute error (AAE), index of agreement (di) and coefficient of determination (R-2) for the SW model were 0.48, 0.37, 0.95 and 0.90, and these indicators for the DKc model were 1.00, 0.69, 0.85 and 0.46, respectively. However, considering the applicability of agricultural practice, the SW model requires more parameters which are difficult to measure. Therefore, the choice of the ET model must be determined according to the specific simulation requirements and measurement conditions.

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