华北农学报2011，Vol.26Issue(4)：153-158,6.
水氮配置对华北冬小麦-夏玉米种植体系氮素利用及土壤硝态氮残留的影响
The Effect of Water-nitrogen Regimes on the Nitrogen Utilization and Soil NO3- -N Residue of Winter Wheat-summer Maize System in the North China Plain
摘要
Abstract
Over-input of water and nitrogen is a common problem of the winter wheat-summer maize system in the North China Plain, thus a field experiment was conducted to analysis the yield, nitrogen utilization and soil NO3--N residue of this system after reduced resource input in Wuqiao of Hebei province in 2008 -2010. Four treatments were included: Conventional input, Conventional input (Improvement) , Reduced input and Least input respectively. Compared with Conventional input pattern, N fertilization input decreased 55% and water input decreased by 36. 6% of Reduced input pattern, while there was no significant difference on the yield between two patterns. Under Reduced input pattern, the PFP was 60.17 kg/kg, soil NO3--N residue was only 99.3 kg/ha in the 2 m soil profile. Under Least input pattern, the annual yield declined 13% , but nitrogen partial factor productivity was 1.78 kg/kg, soil NO3--N residue was only 42.8 kg/ha in the 2 m soil profile. In conclusion, reduced input pattern with fertilization amount of 270 N kg /ha was applied in annually and irrigation at blooming and jointing stage in winter wheat season, could assure the yield of winter wheat-summer maize rotation system, and simultaneously improve nitrogen use efficiency and reduce soil NO3--N residue.关键词
冬小麦-夏玉米/氮肥利用效率/土壤硝态氮Key words
Winter wheat-summer maize rotation system/Nitrogen use efficiency/Soil nitrate nitrogen分类
农业科技引用本文复制引用
徐杰,陶洪斌,宋庆芳,王璞..水氮配置对华北冬小麦-夏玉米种植体系氮素利用及土壤硝态氮残留的影响[J].华北农学报,2011,26(4):153-158,6.基金项目
国家科技支撑计划(2011BAD16B15) （2011BAD16B15）
国家玉米产业技术体系(CARS-02) （CARS-02）
