干旱区生态用水和土壤植被承载力综述

Reveiws on Ecological Water and Soil Water Carrying Capacity in Arid Regions

干旱区的生态恢复与植被建设均受到水分的严重制约,生态用水和土壤水分植被承载力的研究均为实现地区可持续发展的重要一环。生态用水影响土壤水分补给量,而土壤水分补给量是制约土壤植被承载力的因素之一。因此提高土壤植被承载力需要保证干旱区生态用水总量,而森林植被有保持水土、调节地表径流、增加入渗的功能,能够使得干旱区生态用水量增加,从而提高土壤植被承载力,形成良性循环,最终达到生态系统的稳定。综合提炼多篇相关文献的观点,从生态用水和土壤植被承载力的概念、研究发展现状、在植被建设的指导意义3方面综合阐述,讨论了生态用水以及土壤植被承载力的内在联系。

Ecological restoration and vegetation construction are severely restricted by water supply in arid regions.Study on ecological water and soil water carrying capacity has become the key to realize sustainable development.Ecological water influences soil moisture recharge,which is one of the key factors that restrain soil water carrying capacity.Improvement of the soil water carrying capacity has been a guarantee for ecological water in arid regions.In addition,forest vegetation could conserve soil and water,adjust surface runoff and increase infiltration,which add to the amount of ecological water in arid regions.Therefore,soil water carrying capacity will be increased,which will create a virtuous circle and lead to a stable ecosystem.This study summarized the related literature references and discussed the relationship between ecological water and soil water carrying capacity from three aspects including concepts of ecological water and soil water carrying capacity,current development status and importance in vegetation construction.