Title: Hydrological characteristics of different forest types of soil in arid and semi-arid mountain
Abstract: The mountainous forest located at northwestern arid - semiarid part of China is the base of stable development of eco - economic system at piedmont plains and oasises due to its particular hydrological function.With contrast of non - forest land,this article studied the soil - hydro - physical characters,soil infiltrate features,water reserve capabilities of four forest types in typical water reservation forests of Qilian Mountains.Our research showed that:(1) land surface with forest have the function of alkali - depression and can improve organic content of soil. The indexes denotes the hydro - physical features of soil such as soil content,porosity degree and porosity rate at different type of forest are obviously better at land surface with forest than that of non - forest,and those indexes are better at 0~20 cm soil layer than that of 20~40 cm.Large variations exist among different forest types,specifically, the average infiltrate speed is better at Qinghai spruce forest and high mountainous shrub than that of Qilian sabina forest and droughty shrubs.(2) Power functions can effectively simulate the soil infiltrate process of different forests,the infiltration of land surface with forest is better than that of non - forest.The average infiltrate speed of Qinghai spruce forest,high mountainous shrub,Qilian sabina forest is 15.72,13.39 and 1.94 times of droughty shrubs(1.68 mm/min ) respectively.(3 ) The general rule of water reservation amount,water descent and effective water holding of land surface with forest is Qinghai spruce foresthigh mountainous shrubQilian sabina forestdroughty shrubsnon -forest land surface.The water reserve capability of 0~20 cm soil layer is better than 20~40 cm layer.Indicate that Qinghai spruce forest and high mountainous shrub have better functions of water conservation and effect than Qilian sabina forest and droughty shrubs.With consideration of water content reservation and conservation,the Qinghai spruce forest and high mountainous need to be think over.
Publication Year: 2009
Publication Date: 2009-01-01
Language: en
Type: article
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Cited By Count: 2
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