植物营养与肥料学报Issue(6)：1279-1286,8.DOI:10.11674/zwyf.2013.0601
氮肥用量对双季稻产量和氮肥利用率的影响
Effects of nitrogen fertilization on grain yield and nitrogen use efficiency of double cropping rice
摘要
Abstract
Field trials with seven treatments of N application rates (N 0, 60, 120, 180, 240, 300 and 360 kg/ha) were set up to determine the optimum N application rate , and to identify the responses of N fertilization contribution rate, soil N dependent rate and N use efficiency to different N application rates in paddy fields with different yield levels( high, middle and low ) .The results show that the low-, middle-, and high-yield paddy fields have the highest grain yields under the application rates of N 120, 180 and 240 kg/ha, respectively.The nitrogen fertilization contribution rates ( NCR) in the low-and middle-yield fields are larger than that in the high-yield field, and the highest NCRs are acquired in the treatments of N 120 , 180 and 240 kg/ha for the three fields separately . Soil nitrogen dependent rates(SNPR) are in the order: high-yield field >middle-yield field >low-yield field, and the SNPR is decreased with the increase of N application rates to some extent .The trend of nitrogen recovery efficiency(NRE) is low-yield field >middle-yield field >high-yield field, whereas no distinct differences exist for nitrogen agronomic efficiency ( NAE ) , nitrogen physiological efficiency ( NPE ) and nitrogen partial factor productivity( PFPN ) among high-, middle-, and low-yield paddy fields.All NAE, NRE and PFPN in high-, middle-, and low-yield paddy fields are decreased with the increase of N application rates , while NPE remains relatively stable among different fertilization treatments .The optimum N application rates for double cropping rice in low-, middle-and high-yield fields are N 120, 180 and 240 kg/ha, respectively.关键词
高/中/低产田/双季稻/产量/氮肥施用量/氮肥利用率Key words
High、middle、and low-yield paddy fields/double cropping rice/yield/nitrogen fertilizer application rate/nitrogen use efficiency分类
农业科技引用本文复制引用
王秀斌,徐新朋,孙刚,孙静文,梁国庆,刘光荣,周卫..氮肥用量对双季稻产量和氮肥利用率的影响[J].植物营养与肥料学报,2013,(6):1279-1286,8.基金项目
现代农业产业技术体系建设专项资金（CARS-01-31）；农业部公益性行业（农业）科研专项（201003016）；国家重点基础研究发展计划（2013CB127405）项目资助。 （）
