The effect of vegetation on soil and water conservation increases with the increase of planting density. At the same time, the degree of soil drought increases with the increase of planting density, and leads to the decline of vegetation or waste resources and then affects the benefit of vegetation on soil and water conservation. However, there is a few research of high-quality sustainable management of easier degraded soil and water conservation vegetation ecosystems. In this paper, the high-quality sustainable management of soil and water conservation vegetation was reviewed. The results showed that the degree of cover of soil and water conservation vegetation increases with increasing density under other things being equal; the canopy interception increases with stand density but there is a peak value of canopy interception. The surface runoff decreases with increasing density with a logarithm relationship; the sediment charge in the runoff increases with reducing density with a logistic relation. There is a limit of soil and water conservation vegetation, which is the cover degree of soil and water conservation vegetation when the existing plant density of indicator species in a plant community is equal to vegetation carrying capacity. When plant density of indicator species in a plant community is more than vegetation carrying capacity, the cover degree of soil and water conservation vegetation is more than the vegetation restoration limit of soil and water conservation vegetation, the plant resources relationship should be regulated based on vegetation carrying capacity to realize high-quality sustainable management of soil and water conservation vegetation.

The effect of vegetation on soil and water conservation increases with the increase of planting density. At the same time, the degree of soil drought increases with the increase of planting density, and leads to the decline of vegetation or waste resources and then affects the benefit of vegetation on soil and water conservation. However, there is a few research of high-quality sustainable management of easier degraded soil and water conservation vegetation ecosystems. In this paper, the high-quality sustainable management of soil and water conservation vegetation was reviewed. The results showed that the degree of cover of soil and water conservation vegetation increases with increasing density under other things being equal; the canopy interception increases with stand density but there is a peak value of canopy interception. The surface runoff decreases with increasing density with a logarithm relationship; the sediment charge in the runoff increases with reducing density with a logistic relation. There is a limit of soil and water conservation vegetation, which is the cover degree of soil and water conservation vegetation when the existing plant density of indicator species in a plant community is equal to vegetation carrying capacity. When plant density of indicator species in a plant community is more than vegetation carrying capacity, the cover degree of soil and water conservation vegetation is more than the vegetation restoration limit of soil and water conservation vegetation, the plant resources relationship should be regulated based on vegetation carrying capacity to realize high-quality sustainable management of soil and water conservation vegetation.