Response of the Fate of In-Season Fertilizer Nitrogen to Plastic Mulching in Rainfed Maize Croplands of the Loess Plateau

文献类型： 外文期刊

第一作者： Zhang, Xueli

作者： Zhang, Xueli;Wang, Shangwen;Dong, Wenyi;Liu, Enke;Hu, Bin;Gopalakrishnan, Subramaniam;Jin, Tao;Liu, Enke

作者机构：

关键词： plastic mulch; fertilizer nitrogen recovery; soil nitrogen; nitrogen concentration in organ

期刊名称：PLANTS-BASEL （ 影响因子：4.658； 五年影响因子：4.827 ）

ISSN：

年卷期： 2022 年 11 卷 18 期

页码：

收录情况： SCI

摘要： As plastic mulching is widely used for maize production on Loess Plateau, study of the fate of fertilizer nitrogen (N) in rain-fed croplands is of great significance. Field experiments were conducted during 2015-2016 at a typical dry-land farm on the Loess Plateau, China. The stable isotope tracer technique was applied to analyze the effects of plastic mulching on the maize crop yield, N content in the grain, and mechanism of N uptake and utilization in maize plants with plastic mulch (PM) and without plastic mulch (CK) on the Loess Plateau. Maize yield, aboveground dry matter, grain N concentration, and N uptake in aboveground biomass for PM significantly increased, in addition to fertilizer nitrogen recovery and nitrogen production efficiency. Compared to CK, PM improved the total N uptake from the soil in the aboveground biomass by 16.39 and 27.75 kg ha(-1) and fertilizer nitrogen recovery by 10.89 and 22.02 kg ha(-1), respectively. Furthermore, PM increased in-season fertilizer N retention in the soil by 11.9-24.8 kg ha(-1), and the uncountable fertilizer N decreased by approximately 33.8 kg ha(-1) on average. In conclusion, PM simultaneously improved the maize yield and N utilization, which provides a scientific basis for nitrogen management in maize croplands.

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