【摘要】 本文通过野外植被、土壤和地表蚀积状况调查与室内分析测试相结合的方法,对盐池沙地退化草场植被恢复的效果进行了调查。结果表明:示范区退化草场经过封育休牧结合人工补播措施治理后,可使不同立地条件下的植物种增加,生物量提高66.3%～214%,植被盖度提高,且封育休牧结合人工补播措施较单一封育休牧措施效果更明显,前者生物量较后者提高1.54倍。随着示范区流沙的固定和植被的恢复,0cm～40cm土层中<0.01mm的物理性粘粒含量、有机质含量、全氮量、速效磷含量、速效钾含量均较流沙有所增加,且流沙治理区沙丘的蚀积厚度均减小,而不同植被恢复区其蚀积厚度表现不同,其中沙蒿种植区呈弱度风蚀,柠条林内呈弱堆积状态,柽柳+沙柳林内堆积厚度最大。更多还原

【Abstract】 In this paper, by investigating soil, field vegetation, and surface wind erosion status, combining indoor analysis, the effect of vegetation recovery on sandy degraded grassland in Yanchi is studied. The results show that: after the process of protective growth, grazing rest and reseeding, the plant species and vegetation coverage are increased, and biomasses are enhanced about 66.3~214, at the same time, the effect of the measure of combining protective growth, grazing rest and reseeding is better than that of single protective growth and grazing rest, the formers biomass is 1.54 times more than the latter. With the fixing of drifting-sand and the recovering of vegetation in demonstration area, the contents of physical clay minerals, organic matter, total N, available P and available K are all increased compared with those on drifting-sand. The thickness of wind erosion in drifting-sand control area is reduced, and the thickness is different in different vegetation recovering area, in which Artemisia sphaerocephala planting area suffers slight wind erosion; Caragana korshinskii forest presents slightly accumulating status, the accumulating thickness in Tamarix and Salix psammophila forest is the most.更多还原