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Relationship Between Soil Fertilities and Larix principis-rupprechtii Communities in Successional Stages

HOU Yong 1,WANG Gui qing 1, ZHANG Liang 2 (1.College of Life Sciences, Hebei University, Baoding 071002,China; 2.Tuoliangshan Plantation Farm, Fuping 073208, China)  
The relationship between the soil fertility regimes and Larix principis-rupprechtii communities in Fuping County among Taihang Mountains was studied. The results were as follows: with the development of the forest community, available N, available P, total N and organic matter in the top 20 cm thickness of soil were increased steadily. As the structure of the forest community grew more complex, the species diversities both in the shrub layer and in the herbaceous layer were all reached a peak and then decreased .The field investigation also found that human disturbance could modify the relationship between the soil fertility regimes and the forest communities.Effective measurements should be taken to conserve the forest community.
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