绿洲与荒漠交错带植被恢复区土壤水分变化研究

Soil moisture dynamic changes in the revegetated regions of the ecotone between oasis and desert

对绿洲与荒漠交错带的不同类型防护林和不同荒漠植被恢复区土壤水分动态特征作了系统研究,研究结果表明:不同配置的类型防护林含水量整体上远低于对照;说明在无灌溉补充水分的条件下,林木的蒸腾作用耗水量大,土壤含水量低,为了林木的正常生长,应该在夏季及时补水;不同荒漠植被恢复区的土壤水分远高于空旷的沙地,说明不同荒漠植被恢复区,下垫面条件对土壤水分影响甚大,可根据植物种的生物学特性和生态适应性,因地制宜地进行无灌溉植被恢复是比较好的植被恢复方式。

In this study the soil moisture dynamic changes were measured in different types of shelter forests and different types of revegetated regions,and some results were concluded.The soil moisture of all types of protection forest is much lower than the contrast.This result show that the shelter forest must be irrigated in time in summer,because the water consumption of the forest＇s transpiration is very much,the soil moisture is very low,and the forest cannot grow in normal.Secondly,The soil moisture of all types of revegetated regions outclass the contrast.This results show that the soil moisture is effected much by the vegetation over the surface of the sand.According to the biological characteristics and ecological adaptability of the plants,the best way of planting vegetation in desert is that revegetation in the suitable region without irrigation.