关键词: 北京, 北京, 沟域经济, 山区开发

Abstract:

Using 2007 and 2008 soil sample test data, this paper studyed the impact of different land use types on soil fertility by the single factor analysis of variance and multiple mean comparison.The results showed that:(1)There was significant or very significant impact on soil nutrients under diferent land use type.The decreasing order of impact degree is: total N> organic matter> total phosphorus.But there was no significant impact on soil pH value.(2)There was significant impact on soil organic matter and nitrogen among the different land use types.the order from high to low levels are: agricultural land wasteland ﹥Agriculture ﹥ forest ﹥forestry (fruit) intercropping.(3)There was relatively small impact on soil phosphorus among the diferent land use types.Relatively speaking, the content of soil total phosphorus in forest is in the highest level, followed by agricultural land and wasteland, forestry (fruit) intercropping in the lowest.(4)The soil pH values in different land use types did not change significantly, the soil appears alkaline or weak alkaline on the whole, of which agricultural land shows the most alkaline.