摘要
研究结果表明，随施氮量和播种量增加苏丹草的叶面积有逐渐增大的趋势；茎节直径则随施氮量增加而变粗，随播种量增加而变细；再生草的植株密度随施氮量增加而增大，增加播种量对提高头茬草和再生草的植株密度都有明显作用；随施氮量和播种量的增加，苏丹草产草量明显提高。较好的组合为播种量４５０ｋｇ／ｈｍ２＋施氮量１５０ｋｇ／ｈｍ２。
The experimental results showed that the leaf area of sudangrass raised with the increase of N fertilizing rate and sowing rate. The diameter of stem increased with N fertilizing rate, but decreased with sowing rate. Plant density in first cut increased with N fertilizing rate. Herbage yields increased significantly with the increase of N fertilizing rate and sowing rate. The combination of 450kg/hm 2 sowing rate with 150kg/hm 2 N fertilizer gave the highest productivity.
出处
《中国草地》
CSCD
1997年第5期29-32,41,共5页
Grassland of China
关键词
苏丹草
氮肥
播种量
产草量
Sudangrass,\ N fertilizer,\ Sowing rate,\ Herbage yield
