贵州南部混播草地几种建植因素最佳组合研究

摘要

选用苇状羊茅、多年生黑麦草、扁穗雀麦、疏花雀麦、白三叶和紫花苜蓿等六种牧草，采用L9(34)正交试验设计，探讨了在贵州南部地区生态条件下建立永久型优质人工混播草地最佳的草种组合、豆禾比例、播种量和播种方式。结果表明，草种组合是主要因素，播种量次之，用种比例和播种方式无明显影响；贵州南部地区优质永久型人工混播草地的理想草种组合是苇状羊茅+多年生黑麦草+扁穗雀麦+白三叶(或紫花苜蓿)，豆科和禾本科的比例是2∶8，播种量为30.0kg/hm2，播种方式为混种条播。%The optimal combinations of mixed sowing grassland in southern Guizhou were studied. The result indicated that species combination was the key factor, seeding rate was the second. The optimal combination of species was fescue + perennial rye, flat ear brome + white clover + alfalfa. The ratio of legumes to grasses was 2∶8, the seeding rate was 30.0kg/hm2, the sowing style was mixed drilling.