刈割频度、播种比例和施肥量对牛鞭草和白三叶混播草地牧草产量的影响

在不同刈割频度、施肥量和混播比例下,对混播草地牛鞭草和白三叶不同种群年总产草量进行了研究。结果表明,刈割频度对产草量的影响最大,其差异达到极显著水平(P<0.01),其中刈割频度为5次的处理鲜草总产量最高。施肥量和播种比例的互作效应对总产草量的影响差异也达到了极显著水平(P<0.01);其中施肥水平低,牛鞭草混播比例低的处理总产草量高;施肥水平高的处理,牛鞭草混播比例高的则总产草量高,而白三叶则相反。因此,牛鞭草和白三叶的混播在合理的管理措施下是有可能的;同时为了达到高产优质,初步认为刈割间期以45d,较高的施肥量和混播比例以2:1为宜。

The Effects of Cutting Frequency, Seeding Ratio and Nitrogen Fertilizer Level on the Yield of Mixture Pasture of the Hemarthria compressa and Trifolium repens.

In this study, we compared the yield of the mixture pasture of the Hemarthria compressa and Trifolium repen under different cutting frequency, seeding ratio and nitrogen fertilizer level. The yields were significantly different from different cutting frequency (P<0.01), with the highest total fresh yield in five cuttings. The interaction effects between seeding ratio and nitrogen fertilizer level were also observed (P< 0.01). The yields of limpograss were higher with lower fertilizer and lower ratio of Hemarthria compressa or higher fertilizer and higher ratio of Hemarthria compressa than the other combinations of the fertilizer level and seeding ratio. And an opposite trend was observed for the white clover. Thus, it was feasible to mix Hemarthria compressa with Trifolium repens in the pasture under proper management. In order to get the high yield with good quality, it was suggested to cut five times with higher fertilizer level and the seeding ratio of Hemarthria compressa with Trifolium repens as 2 : 1.