Research on hydrological effects of litter and soil of 5 economic forest kinds in Taihang Mountains in Hebei Province
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Abstract:
In order to evaluate the water conservation function of economic forests in Taihang Mountains of Hebei Province,we selected five kinds of economic forests (apple,walnut,cherry,chestnut and apricot) planted on terraces and studied the waterholding characteristics and benefits of litter and soil in the forests by indoor immersion method and cuttingring method.Then we analyzed their hydrological effects.The results showed that:The accumulative volume of the litter was as follows:walnut (8.28 t/hm2)>chestnut (7.11 t/hm2)>apple (4.07 t/hm2)>cherry (3.69 t/hm2)>apricot (3.42 t/hm2).Chestnut forest litter had the largest water holding capacity (17.07 t/hm2).There was a logarithmic relationship between the water holding capacity and water holding time of the litter,and a power function relationship between water holding rate and water holding time.The effective interception capacity of litter was the largest in chestnut forest (14.37 t/hm2).Soil bulk density increased with depth.The average soil bulk density of the five economic forests ranged from 1.40 to 1.52 g/cm3.The average maximum water holding capacity of soil in the five economic forests ranged from 856.01 to 946.41 t/hm2.The sequence from low to high was:appleKeywords:
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