条带式改良陡坡草地生产性能的研究

STUDY ON THE HERBAGE PRODUCTIVITY OF BELT IMPROVED PASTURE OF STEEPLAND

本试验对条带式补播改良陡坡草地的生产性能进行了研究。试验根据坡度分为小于25°、25～35°和大于35°的坡地三个处理组。其结果表明,条带式改良草地可以提高产草量,较天然草地三个坡度级分别提高200.39、253.12和203.27%(P<0.01),又可以改善草群品种,豆科牧草分别占总产草量的48.97、72.33和84.14%,且有毒有害植物明显减少。植被盖度由原来的42.5%增加到83.5%,将蒿属植物为建群种的群落变为沙打旺—野艾蒿—万年蓬组成的群落。

This paper studied the herbage yield of belt improved pasture of steepland.Three groups were <25°,25～35° and >35°The result showed that herbage yield of holt improved pasture has sig- nificantly increased.Compared with natural rangeland.Three slope degrees have increased 200.39,253.12 and 203.270% (p<0.01),It also has improved quality of grassland.The yield of legume made up 48.97,72.33 and 84.14% of total herbage yield,respectively.Poisonous plants have been reduced.Plant cover was signifisantly changed after improved.Total cover was increased from 42.5 to 83.5%.Plant community was also changed.