刈割次数·施氮量和混播比例对混播草地的产量和群落组成的影响

Effect of the Cutting Treatment,Nitrogen Quantity and Mixture Proportion on the Total Yields and Composition of Mixed Pasture

研究了刈割次数、施氮量和混播比例对扁穗牛鞭草和白三叶混播草地产量和群落组成的影响。结果发现,混播草地各处理产量均高于对照,处理④产量最高。处理12○中白三叶在混播草地中所占比例最高。刈割次数是影响混播草地产量和混播群落组分变化的决定因素。采用灰色关联综合分析各混播组合的稳定性发现,处理④和12○的稳定性最好。试验显示,在合适的栽培管理条件下成功建植扁穗牛鞭草和白三叶混播草地是可能的。

rlhe total yields and composition of mixed pasture under different cutting frequency, nitrogen fertilizer and seeding rotes were determined. We found that four times treatment had the highest yield and white clover was in the highest proportion in the treatment 12. rlhe cutting frequency was the most important factor influencing the yield and composition of mixed pasture. According to the method of grey theory, the result indicated that the forth and twelfth treatment remained the suitable use. Under the suitable culture management, it was possible to build mixture pasture of limpo-grass and white clover successfully.