Influence of thinning on soil fertility in artificial forests

Abstract

Abstract: The influence of thinning on soil fertilities in artificial forests of Cunning hamia lanceolata,Pinus massoniana,Fokienia hodginsii,Cryptomeria fortunei and Schima superba were studied.Thinning after two years reduced crown density of plantation stands,improved habitat conditions in plantations,promoted growth of native vegetation under plantations,increased understory cover degree,biomass and species richness.The more the thinning intensity,the more the effects.Compar ing with no thinning plantation stands,the thinning plantation stands increased soil microbe quantities,strengthened soil enzyme activities,decreased bulk dens ity,enhanced soil total porosity degree and available nutrients,improved soil fe rtilities after two years.The mechanism that thinning improves soil fertility is that the increased understory biodiversity after thinning enhances the increasi ng of quantity and diversity of soil microbe,and therefore,strengthens bioactivi ty of soil,accelerates nutrient cycling of soil.

Key words: Thinning, Artificial forest, Soil fertility, grain filling characteristics., maize, sowing date

CLC Number:

ZHANG Dinghua . Influence of thinning on soil fertility in artificial forests[J]. Chinese Journal of Applied Ecology, 2001, 12(5): 672-676.

References

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