Water pollution risk from nitrate migration in the soil profile as affected by fertilization in a wheat-maize rotation system
文献类型： 外文期刊
作者： Shi, Ning 1 ; Zhang, Yingpeng 1 ; Li, Yan 1 ; Luo, Jiafa 3 ; Gao, Xinhao 1 ; Jing, Yongping 1 ; Bo, Luji 1 ;
作者机构： 1.Shandong Acad Agr Sci, Inst Agr Resources & Environm, Jinan 250100, Shandong, Peoples R China
2.Minist Agr, Key Lab Agroenvironm Huang Huai Hai Plain, Beijing, Peoples R China
3.Ruakura Res Ctr, AgRes, Hamilton 3240, New Zealan
关键词： Controlled release fertilizer; Nitrogen; Use efficiency; Nitrate accumulation
期刊名称：AGRICULTURAL WATER MANAGEMENT （ 影响因子：4.516； 五年影响因子：5.12 ）
ISSN： 0378-3774
年卷期： 2018 年 210 卷
页码：
收录情况： SCI
摘要： Reducing nitrogen (N) fertilizer input into the soil is needed by a crop production and environmental pollution control. A field experiment using a wheat-maize rotation system was conducted in North China Plain (NPL) to evaluate agronomic performance and the reduction of nitrate accumulation. The trial consisted of three replicates of five treatments: no nitrogen (CK), recommended N rate (REC) (180 and 210 kg ha(-1) N fertilizer as urea for wheat and maize, respectively), same amount N in the form of controlled release fertilizer (CRF), with addition of duck manure to achieve the same total N rate as REC (80% REC + DM) and conventional fertilization (CF) (315 and 270 kg ha(-1) N fertilizer as urea for wheat and maize, respectively). During the continued fertilization of the rotation system, the CRF application had an equal yield, N use efficiency (48%) and residual N (175 kg ha(-1)) but decreased the estimated N loss (18 kg ha(-1)) when compared to REC (72 kg ha(-1)). N accumulated below the root zone in the 40-60 cm soil layer was at a high risk of migrating deeper in the soil profile. Application of CRF could effectively reduce the nitrate N accumulating in the soil, slowing down the rate of nitrate migration to the deep soil.
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