Study on the Relationship between Water Conservation Function and Stand Factors in Dawujia Watershed, Inner Mongolia
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1.
College of Ecology and Environmental Science, Inner Mongolia Agricultural University, Huhhot 010019, Inner Mongolia, China
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2.
Forestry Administration of Huhhot City, Huhhot 010019, Inner Mongolia, China
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Received Date:
2013-02-03
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Abstract
Taking different forest types in Dawujia Watershed of Ao'han County, Chifeng city, Inner Mongolia as the research object, the correlation between water conservation function and stand factors was studied in order to evaluate the level of water conservation function by stand factors. The results of research show that the average height, the average diameter at breast height, crown width, crown thickness, volume per hectare, annual volume increment, canopy density, ground cover coverage, undergrowth coverage, and community structure are the most important factors impacting and related to water conservation function. These ten key factors can be used to evaluate the water conservation function of forest. For litter layer, the stand factors closely related to water conservation function are the average diameter at breast height (0.734 7), annual volume increment (-0.806 8), crown thickness (0.464 7), crown width (-0.674 6), community structure (-0.370 0), litter cover (0.677 6), volume per hectare (-0.617 9), and canopy density (-0.587 2); For soil layer, the stand factors closely related to water conservation function are the average height(0.592 1), the average diameter at breast height (0.275 0), volume per hectare (0.827 5), canopy density (0.317 3), annual volume increment (0.767 7), and crown width (0.749 0);For both the litter layer and soil layer, the stand factors closely related to water conservation function are canopy density (0.831 7), volume per hectare (0.817 2), undergrowth coverage (0.652 5), average diameter at breast height (0.644 7), and the crown width (0.521 2); From the viewpoint of the total water storage capacity of forest, the most important factors are the ground cover coverage (0.462 6) and the volume per hectare (0.315 5).
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