Optimizing surface fertigation practices for application in farmers' field in the North China Plain

文献类型： 外文期刊

第一作者： Sun, Xiulu

作者： Sun, Xiulu;Li, Jinshan;Sun, Xiulu;Hellegers, Petra;Ritzema, Henk;Li, Jinshan;Zhang, Hanyue;van Dam, Jos;Sun, Xiulu

作者机构：

关键词： Surface fertigation; Border irrigation; Surge irrigation; WinSRFR

期刊名称：AGRICULTURAL WATER MANAGEMENT （ 影响因子：6.7； 五年影响因子：6.6 ）

ISSN： 0378-3774

年卷期： 2023 年 284 卷

页码：

收录情况： SCI

摘要： Applying nitrogen fertilizer is commonly used to increase yields of surface-irrigated crops, despite often low application efficiency (AE) and distribution uniformity (DU). Surface fertigation, the application of fertiliser dissolved in irrigation water, is a promising technique for improved on-farm performance. This study evaluated surface fertigation strategies in a field experiment and by modelling with WinSRFR. The field experiment was conducted in the North China Plain in 2017-2019. The aim was to test different practices and for model vali-dation, then to develop optimisation scenarios. The study found, first, that conventional practices resulted in low AE of irrigation, around 40 % in wheat season and 60 % in maize season. DU, however, was satisfactory in both wheat and maize seasons, averaging 80 %. Second, surge border irrigation showed no significant advantage in terms of performance compared to the conventional practice of continuous border irrigation. Third, the WinSRFR model offered satisfactory accuracy compared to field-measured data; and soil infiltration parameters, such as the Kostiakov K, showed temporal variation during the crop seasons. Fourth, improved fertigation scenarios were developed by optimising the cut-off ratio in tandem with changes in border length and fertigation timing. The optimised strategies resulted in AE and DU increasing to some 90 %.

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