禁牧封育对退化草地的改良效果

Effect of enclosure and grazing prohibition on the improvment of deteriorated grassland

在实施天然草原退牧还草示范工程的青海省玉树县上拉秀乡进行了3年禁牧封育退化草地的观测,研究了禁牧封育对高寒草甸和高寒沼泽化草甸退化草地的改良作用。试验结果表明,禁牧封育对恢复高寒草甸和高寒沼泽化草甸退化草地植被有明显的效果。禁牧封育后草地中植物的盖度,高度和产草量明显提高;牧草种类发生显著变化,莎草科、禾本科牧草的种类和产量增加,杂类草的种类和产量明显下降。

The effect of enclosing and grazing prohibition on the improvment of deteriorated alpine meadow and the alpine swamp meadow was conducted. The result showed that this measure has a great, effect for deteriorated grassland. Comparing data from 2003,2004 and 2005, it was found that the coverage, height, and grass yield were increased, and the components of vegetation were changed greatly, the proportion of high quality grasses was increased,and the forbs were decreased.