锡林河流域退化草地植被恢复措施及水土保持效应研究

以内蒙古北部锡林河流域退化草地为研究对象,通过对围栏封育、免耕补播、旱作人工草地、灌溉人工草地和灌溉饲料地5种措施作用下植物生长状况、土壤水分保持作用、抗风蚀能力的试验研究。结果表明:围栏封育、免耕补播在恢复退化草地植被、提高生产力方面效果显著,是退化草地生态修复的主要措施;适地实施旱作人工草地、灌溉人工草地和灌溉饲料地面积各1hm~2,可置换出退化草地面积分别为10hm~2,18hm~2和79hm~2;通过灰色关联度进行效益评价,各种植被恢复措施之间的综合效益差异不明显,植被恢复措施实施后,综合效益均达到较高水平。

Effects of vegetation restoration methods on soil and water conservation of degraded grassland in Xilinhe River watershed

The degraded grassland in Xilin River watershed in the north of Inner Mongolia was selected as the research site to study the effects of restoration treatments(enclosure,reseeding,rain-fed artificial grassland, irrigated artificial grassland and irrigated fodder cropping)on plant growth,soil water conservation function and the ability of anti-wind erosion.The result showed that the enclosure and reseeding significantly improved the productivity of the degraded grassland.1 ha of rain-fed artificial grassland/irrigated artificial grassland/irrigated artificial fodder field could replace 10 ha/18 ha/79 ha of degenerated grassland.The difference of comprehensive benefits(through grey correlation evaluation)among restoration treatments was not significant and the compre-hensive benefits from all tested treatment were quite high.