【摘要】 通过对控释氮肥减量且随小麦播种一次性施用(CRF),与农民习惯施肥(FP)及优化施肥(OPT)进行对比试验研究。结果表明:(1)减量施用控释氮肥使小麦群体及产量构成因素整体表现优于FP和OPT处理;(2)CRF处理能够保证小麦稳产,单位面积(667m2)较FP处理增收66.8元,其氮素回收率和氮偏生产力较FP处理分别提高19.7%和34.3%;(3)CRF处理各深度土层硝态氮含量均低于OPT和FP处理,极大降低硝态氮向土壤深层次淋溶的风险。在小麦上减量使用控释氮肥具有简化生产环节、节本增收、提高氮养分利用和减少环境污染等优势,具有应用前景。更多还原

【Abstract】 Compared with farmer’s traditional fertilization(FP) and optimized N fertilization(OPT),effect of reducing amount of controlled release N fertilizer and one-time application with the wheat sowing on wheat yield,N efficiency and soil NO3--N was studied.The results showed that:(1) Reduction of amount of controlled release N fertilizer could make wheat group and yield components superior to FP and OPT;(2) Application of controlled release N fertilizer could ensure wheat yield stable and increase the income of 66.8 yuan per unit area(667 m2) compared with FP treatment.N recovery rate and N partial factor productivity increased by 19.7% and 34.3% respectively compared to FP treatment;(3) The content of soil NO3--N in CRF treatment was lower than OPT and FP treatments in different soil depth,which greatly reduced risk of NO3--N leaching to the deep layer.Reducing the amount of controlled release N fertilizer on wheat contribute to simplifying production operation,saving cost and increasing income,improving nitrogen use efficiency and reducing environmental pollution and so on,which has a application prospect.更多还原