摘要： 在我国西南地区开展了扁穗牛鞭草与白三叶混播草地产量和种间竞争的替代试验。结果表明,处理组合A2B2(扁穗牛鞭草与白三叶混播比例各一半)的产量高于其他组合,为357.38 g/m²;各个混播组合中,RYT值大于1表明扁穗牛鞭草与白三叶能利用不同的资源,RCC值大于1表明白三叶竞争力强于扁穗牛鞭草,牛鞭草RSC值大于1,而白三叶的却小于1。总之,白三叶竞争与侵占力较强导致其生长速率较快且植株干质量增长迅速。混播组合中白三叶的竞争力表现也强于扁穗牛鞭草。

关键词: 扁穗牛鞭草, 白三叶, 混播草地, 产草量, 种间竞争

Abstract: The replacement experimentation about yield and interspecific competition of Hemarthria compressa and white clover were conducted in the regions of Southwest China.The results indicated that the yield of treatment A2B2(Hemarthria compressa 50%+White clover 50%) was 357.38 g/m2,higher than those of other treatments.In the mixed combination,the value of RYT was more than 1.0 and it indicated that Hemarthria compressa and white clover can used different resources in part.The value of RCC of white clover was more than 1.0 and it indicated that the competitive ability of white clover was stronger than that of Hemarthria compressa.The value of RSC of Hemarthria compressa was more than 1.0,but the case was reverse for white clover.In summary,the invasive and occupied abilities of white clover were such strong that its plant growth rate was high and the weight per plant was going up rapidly.The competitive performance of white clover was superior to that of Hemarthria compressa in the mixed combination.

Key words: Hemarthria compressa, White clover, Mixture pastures, Yield, Interspecific competition

中图分类号: 

• S143