Soil water carrying capacity of vegetation in the northeast of Ulan Buh Desert, China |
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Authors: | Youliang Tian Yanhong He Liansheng Guo |
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Institution: | (1) Forestry College, Inner Mongolia Agricultural University, Hohhot, 010019, China |
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Abstract: | The dynamic change of soil water as a function of leaf area index and the soil water deficit value, prerequisites for assuring
the survival of plants, were simulated. We established a dynamic soil water model based on a theory of water balance, the
characteristics of the environment, and the physiological ecology of the plants in the Ulan Buh Desert, northwestern China.
We estimated the soil water carrying capacity of the vegetation in our study area of the desert. The results showed that the
proportion of soil evaporation in the total amount of precipitation was greater than 60% in the wandering and semifixed sands
and 44.8%in the fixed sand. When the leaf area index was less than 1.7 m2/m2, the soil water deficit was maintained at a low level, but when the leaf area index continued to increase, the soil water
deficit increased rapidly as well. In consequence, we come to the conclusion that the leaf area index of the soil water carrying
capacity of the vegetation is 1.7 m2/m2 in our study area.
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Translated from Scientia Silvae Sinicae, 2008, 44(9): 13–19 译自: 林业科学] |
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Keywords: | Ulan Buh Desert soil water deficit soil water carrying capacity of vegetation leaf area index |
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