华北农学报2017，Vol.32Issue(z1)：279-282,4.DOI:10.7668/hbnxb.2017.S1.048
冬油菜机直播高产优质栽培的氮肥运筹研究
Study on Nitrogen Fertilizer Management of Winter Rapeseed Direct-sown by Machine for High Yield and High Quality
摘要
Abstract
The aim of the study was to obtain optimal nitrogen (N) fertilizer management techniques of winter rapeseed for high yield and high quality under the condition of direct-sown by machine. Two field experiments were conducted in Chengdu Plain of Sichuan Province under a rice-rapeseed rotation system. The effects of different N applied rates (0,90,135,180,225 kg/ha) in the same N application method and different N application method (single application of basal fertilizer,twice application of a basal fertilizer and a top dressing,three times of applica-tion as a basal fertilizer and two top dressings) in the same N rate (180 kg/ha) on agronomic traits,yield,quality and nitrogen fertilizer used efficiency of rapeseed Chuanyou 36 were studied.The results showed that the effects of N fertilizer management on agronomic traits,yield,quality and nitrogen fertilizer used efficiency in rapeseed were sig-nificant.Seed yield was improved with the increase of N rates (0 -225 kg/ha) and high yield level (≥3 000 kg/ha) were obtained by N135,N180 or N225 treatment. There was an obvious trend of decrease in seed oil per-cent,but increase in protein percent with the increased in N applied rates. With the increased in N applied rates (90-225 kg/ha),agronomic efficiency of applied N fertilizer(27.9-15.0 kg/kg) and partial factor productivity from applied N fertilizer(29.2-15.6 kg/kg) of rapeseed were obviously or notably decreased and increased for N fertilizer contribution rate(37.2% -52.5%). No significant difference of seed yield,seed oil percent and protein percent of rapeseed were observed. Therefore,The rate of N 135-180 kg/ha and single basal or twice application of a basal fertilizer and a top dressing are suitable nitrogen fertilizer management techniques for high yield and high quality of rapeseed Chuanyou 36 under the condition of high density and direct-sown by machine and moderate soil fertility of Chengdu Plain in Sichuan Province.关键词
冬油菜/机直播/氮肥运筹/产量/品质/氮肥利用率Key words
Winter rapeseed/Direct-sown by machine/Nitrogen fertilizer management/Yield/Quality/Nitro-gen fertilizer use efficiency分类
农业科技引用本文复制引用
刘士山,张余红,廖方全,吴永成,蒲晓斌..冬油菜机直播高产优质栽培的氮肥运筹研究[J].华北农学报,2017,32(z1):279-282,4.基金项目
四川省农作物育种攻关栽培课题(2016NYZ0051) （2016NYZ0051）
四川油菜创新团队"川西平原油菜轻简高效栽培"岗位 （）
