植物营养与肥料学报2012，Vol.18Issue(6)：1449-1456,8.
施用控释尿素对油菜籽产量、氮肥利用率及土壤无机氮含量的影响
Effects of controlled release urea application on yield, nitrogen recovery efficiency of rapeseed and soil inorganic nitrogen content
摘要
Abstract
Four field trials were conducted to yield, nitrogen recovery efficiency of China in the 2009- 2010 rapeseed application in rapeseed fields. The rapeseed study the effects of the controlled release urea (CRU) application on and soil inorganic nitrogen concentration in the main rapeseed zone of growth period. The special purpose was to provide evidence for the CRU results show that the application of CRU promotes the growth of rapeseed significantly and enhances the nitrogen supply in the whole period. Compared to the treatment with total N as base fertilizer ( UB ), the SPAD value, plant height and green leaf number of individual plant are increased significantly under the fertilization. The application of CRU increases the yield of rapeseed by 7. 1%-19.7% , and the factorsfor the increase are branch number, pod number and high position of first nodes. The nitrogen accumulation amount and nutrient recovery efficiency are increased by 16. 9%-27.3% and 12. 2-17.7 percentage points compared to the UB treatment, and the NO3--N concentration, total inorganic nitrogen (Nmin) in tillage layer soils are increased by 149.3%-296. 1% and 40. 5%-145.9%. There are no significant differences in the growth indexes, yield and dry matter amount between the CRU treatment and the treatments of total N split application ( UD), while the N accumulation and N recovery efficiency have increasing trends. Therefore, the effect of the total N split application on rapeseed could be achieved by CRU.关键词
控释尿素/产量/氮肥利用率/无机氮Key words
controlled release urea/yield/nitrogen recovery efficiency/inorganic nitrogen分类
农业科技引用本文复制引用
王素萍,余正伟,李小坤,鲁剑巍,李慧,吴庆丰,汪航,王寅,肖国滨,薛欣欣..施用控释尿素对油菜籽产量、氮肥利用率及土壤无机氮含量的影响[J].植物营养与肥料学报,2012,18(6):1449-1456,8.基金项目
“十一五”国家科技支撑计划重点项目 （）
现代农业产业技术体系建设专项资金资助 （）
国际植物营养研究所合作项目（HUB-39）资助. （）
