Effect of vegetation and land use on soil fertility in Wutai Mountains of Shanxi Province |
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| Authors: | Zhang Xiaoquan Song Chaoshu Zhang Qinghua |
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| Institution: | (1) Research Institute of Forest Ecology and Environment, Chinese Academy of Forestry, 100091 Beijing, P. R. China |
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| Abstract: | By comparison of several kinds of forest stands, effect of vegetation and land use on the surface soilwas investigated in Wutai Mountains of Shanxi Province. The result shows that larch (Laris principis-rupprechtii)and birch stands (Betula platyphylla) have more favourable influence on the properties of surface soil than pine(Pinus tabulaeformis) plantation and mixed plantation of pine and poplar (Populus cathayana). Since deciduousspecies forest had more annual litter and higher nutrient contents in the litter. thus much more nutrient returned tosoil. Mixed planting of pine and poplar could largely improve the soil fertility because litter of poplar is greater inamount and decomposes within 1 ~2a. The shrub lands contained high nutrient contents in leaves and relativelyfew human intervention, much of nutrient accumulates in the soil over a long period, resulting in higher nutrientcontents in shrub land soil than that in pine plantation soil. Some of them. such as rose (Rosa bella). spiraea(Spiraea trilobata), ostryopsis (Ostryopisis davidiana) and bushclover (Lespedeza bicolor) dominant stands, haveeven higher nutrient status than larch and birch stands. Land-use could significantly change the soil fertility. Soilorganic matter and nutrient contents decreased after shrub stand was cultivated as cropland, but increased largely to the pre-cultivated level during following period. lt is recommended that larch is the optimum species in theafforestation activities in this area. Natural birch stand should be protected from further damage. Cultivation ofshrub land should be stopped. The development and comprehensive utilization of shrub resources should bestrengthened by the way of alternative cultivation. |
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| Keywords: | Vegetation Soil nutrient Soil fertility |
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