浑善达克沙地退化草场的封育效果及其评价

THE EFFECT AND EVALUATION OF CLOSED DEGENERATED RANGELAND IN HUNSHANDAKE SANDY LAND

通过对浑善达克沙地退化草场封育效果的研究,结果表明,在该地区,退化草场一经封育其植被盖度、草层高度、牧草产量明显增加,植被恢复较快。恢复后的植被如继续封育,其封育效果已不明显。经研究,在浑善达克沙地,对于退化草场的封育期以5 a左右为宜。

The experiment for closing the degenerated rangeland in Hunshandake Sandyland was conducted from 1997 to 2005. Resuits showed that,once degenerated rangeland was closed,the coverage and the hight and the forage production and the root biomass of the rangeland increased evidently ,and the vegetation recovered rapidly. If recovered vegetation continued to be closed, the results was not evident. So reasonable dosed period for degenerated rangeland is about 5 years in Hunshandake Sandyland.