阿拉善盟草库伦建设现状及效益分析

CONSTRUCTION OF FENCED PASTURES AND BENEFIT ANALYSIS IN ALASHAN PREFECTURE

通过对草库伦建设的全面调查及效益分析,表明草库伦具有十分明显的生态效益,经济和社会效益。草库伦围建后牧草高度平均增长2.2倍,植被盖度由0.2～20％,增加到47.3～90％,牧草平均亩产增加57.1公斤,牧草种类由封前3～4种增加到40多种。充分说明草库伦建设对于恢复植被,促进生态平衡效果明显,是合理利用及培育改良草原行之有效的途径之一。

Investigation and benefit analysis on construction of fenced pastures indicate that fenced pasture has marked ecological, economic and social benefits. After fencing, grass height increased 2.2 times on the average, vegetation cover increased from0.2-20％to 47.3—90％; average forage production per mu increased 57.1 Ketogram which was 3.1 fold increase on average and a maximum of 29.1 fold was obtained. Number of grass species increased from 3—4 to over 40. It is suggested that construction of fenced pastures has obvious effect on restoration of vegetation and improvement of ecological balance, and is one of the effective ways of grassland utilization and improcement.