Water pollution risk from nitrate migration in the soil profile as affected by fertilization in a wheat-maize rotation system

作者：Shi, Ning; Zhang, Yingpeng; Li, Yan^*; Luo, Jiafa; Gao, Xinhao; Jing, Yongping; Bo, Luji

来源：Agricultural Water Management, 2018, 210: 124-129.

DOI：10.1016/j.agwat.2018.08.006

• Controlled release fertilizer
• Nitrogen
• Use efficiency
• Nitrate accumulation

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.

• 出版日期2018-11-30
• 单位山东省农业科学院