Abstract
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.