Abstract:

In order to discuss the effect of low-efficient shelterbelts transformation on soil amelioration in Huajialing. The soil physicochemical properties were studied by choosing low-efficient Populus pure forest which grew badly and Picea asperata pure forest, Picea asperata Populus, Picea asperata Pinus tabulaeformis and Picea asperata Larix prncipis-rupprechtii which were transformation forest in the district of Huajialing. The results showed that: (1) Differences of soil mean bulk density, capillary porosity, total porosity and venting quality were significant between Picea asperata pure forest and its mixed forests and Populus pure forest. Compared with Populus pure forest, after low-efficient transformation, the soil bulk density of Picea asperata pure forest and its mixed forests were decreased to some extent, porosity and vent ability were improved. (2) The contents of soil available N, available K, total N, total P, total K and organic matter in forest types all decreased gradually with the increasing of soil depth except the available P. And the organic matter,available N, P, K and total N, P, K of Picea asperata pure forest and its mixed forests were higher than Populus pure forest. PH of Populus pure forest was higher than Picea asperata pure forest and its mixed forests. (3) The correlations between soil organic matter, total N and soil bulk density, total porosity of Picea asperata pure forest and its mixed forests were better than Populus pure forest. Amelioration effects of Picea asperata pure forest and its mixed forests on soil physicochemical properties were superior to Populus pure forest.

Key words: Huajialing, shelterbelt, mixed forest, soil physicochemical property, amelioration