摘要
试验表明,在施一定量磷、钾、硫、锌、锰、铜肥的基础上,俯仰臂形草 Brachiaria decumbens 的干物质产量和粗蛋白含量随施氮量的增加而上升;在施氮处理范围内,氮肥利用率随施氮量的增加而降低。施氮量0~172 5 kg/hm2,种子产量随施氮量的增加而增加;当施氮量达到 103 5 kg/hm2 时,种子产量最高;达到304 kg/hm2 时,随施氮量增加,种子产量呈下降趋势。
It was showed in this trail that,based on certain quantities of P,K,S,Zn,Mn and Cu,the dry matter yield and crude protein content of Brachiaria decumbens gradually increased with increased nitrogen application between 0~172.5 kg/hm^2. The utilization rate of nitrogen decreased gradually at all nitrogen levels. When nitrogen application reached to 103.5 kg/hm^2, seed yield reached the highest value (304 kg/hm^2), If nitrogen application increase continued, seed yield decreased.
出处
《草业科学》
CAS
CSCD
2005年第2期48-51,共4页
Pratacultural Science
基金
云南省自然科学基金重点项目(96C007Z)资助
关键词
俯仰臂形草
氮水平
生产性能
Brachiaria decumbens
nitrogen fertilizer levels
seed yield
