摘要
双低油菜中双5号不同施氮量田间小区试验结果表明：（1）主序产量占单株产量的比例随氮肥用量增加而下降，分枝产量的比例则上升。（2）随施氮水平的提高，高效分枝群有下移的趋势。（3）氮肥对分枝角果数影响最大。（4）不同施氮水平的结角层结构、分枝的经济系数明显不同。
The effects of nitrogen fertilizer on the productivity of main stem and branches of double-low rape Zhongshuang No.5 were studied in this experiment. Results were as follows:(1) The distribution of seed yield between main stem and branches varied with rates of nitrogen fertilizer applied. As the rate Increased, but not overrated, seed yield on the main stem occupied decreasing proportion of the total yield. (2) The productivity of the main stem and branches was varied with rates of nitrogen fertilizer, thereby group of efficient branches was descended in vertical height. (3) The maximum effect of nitrogen fertilizer on the number of branch pods among the yield factors was observed. (4) The pod canopy structure was responsive to the rate of nitrogen fertilizer. Thus among the pod canopy structures the harvest indexes of stem and the branches were different with each other.
出处
《中国油料》
CSCD
北大核心
1997年第3期59-62,共4页
关键词
油菜
氮肥
分枝
生产
结角层结构
施肥量
Double-low rape
Nitrogen fertilizer
Branch productivity
Pod canopy structure
