Nutrient Expert Improves Nitrogen Efficiency and Environmental Benefits for Winter Wheat in China

文献类型： 外文期刊

第一作者： Zhang, J. J.

作者： Zhang, J. J.;He, P.;Ding, W. C.;Ullah, S.;Zhou, W.;He, P.;Xu, X. P.;Wang, Y. L.;Jia, L. L.;Cui, R. Z.;Wang, H. T.

作者机构：

期刊名称：AGRONOMY JOURNAL （ 影响因子：2.24； 五年影响因子：2.829 ）

ISSN： 0002-1962

年卷期： 2018 年 110 卷 2 期

页码：

收录情况： SCI

摘要： Over application of N and P and poor nutrient management have become a common practice on the North China Plain, and lead to low nutrient use efficiency (NUE) and serious environmental problems. Thus, nutrient management for crops must be improved. In this study, 315 field experiments were conducted from 2011 to 2014 in major winter wheat domains in north-central China to validate the continual feasibility of the Nutrient Expert (NE) system for improving NUE and reducing greenhouse gas (GHG) emission. The NE system significantly increased grain yield, profitability, and NUE, and decreased GHG emission. Compared with farmers' practice (FP), the NE treatment reduced N and P inputs by 41.4 and 30.1% (115 kg N ha(-1) and 36 kg P2O5 ha(-1)), respectively, and increased K input by 51.5% (25 kg K2O ha(-1)). Compared with the FP and soil testing (ST) treatments, the NE treatment increased agronomic efficiency of nitrogen (AEN) by 70.0 and 13.3%, recovery efficiency of nitrogen (REN) by 73.8 and 13.3%, and partial factor productivity of nitrogen (PFPN) by 58.5 and 22.2%, respectively. Compared with the FP and ST treatments, the NE treatment reduced total N2O emissions by 54.8 and 26.3%, total GHG emissions by 44.8 and 22.9%, and GHG emission intensity by 45.8 and 22.0%, respectively. These results confirmed that NE is an effective method to make fertilizer recommendations for wheat in north-central China and has the potential to improve yield, NUE, and profitability, with low environmental pollution.

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