祁连山东端北麓不同海拔高度对生态修复成效的影响

The Effects of Different Altitudes on Ecological Restoration Result in North Slope of Qilian Mountain Eastern End

为了提高祁连山东端北麓生态修复成效和节约修复成本,调查研究了不同海拔高度人工修复区、自然修复区和自然植被区植物种类、植被盖度、土壤相对含水量、径流痕和修复成本差异。结果表明:同一海拔不同修复区中,人工修复区植物种类、植被盖度、土壤相对含水量均高于自然修复区,但低于自然植被区;径流痕低于自然修复区,但高于自然植被区。不同海拔同一修复区中,植被盖度、土壤相对含水量随着海拔高度的升高先升高后降低,径流痕随着海拔高度的升高先降低后升高,修复成本随着海拔高度的升高而升高。不同海拔高度中2400~2600、2600~2800m区域植物种类、植被盖度相对较高,修复成本居中,建议以人工修复为主,3000~3200m区域植物种类、植被盖度相对较低,修复成本较高,建议以自然修复为主。

In order to enhance the ecological restoration effectiveness and reduce cost in north slope of Qilian Mountain eastern end,the differences of plant species,vegetation cover,soil relative water content,runoff marks,and restoration costs were investigated and researched,which were on artificial restoration,natural restoration and natural vegetation of different altitude.The result showed that in different restoration areas at the same altitude,the number of plant species,vegetation cover,soil relative water content of artificial restoration were higher than natural restoration,but lower than natural vegetation;the runoff marks was lower than natural restoration,but higher than natural vegetation.In different altitude at the same restoration areas,the plant species,vegetation cover,soil relative water content were first increased and then decreased with the altitude increased,the runoff mark was first decreased and then increased with the altitude increased,and the restoration costs was increased with the altitude increased.The plant species,vegetation cover of 2400~2600 m and 2600~2800 m were higher than another altitude,the restoration cost was in the middle,where were suggested to restored with artificial restoration first,The plant species,vegetation cover of 3000~3200 m were lower than another altitude,the restoration cost was higher,where was suggested to restored with natural restoration first.