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水土保持乔灌混交林N、P养分循环的研究(PDF)

《南京林业大学学报(自然科学版)》[ISSN:1000-2006/CN:32-1161/S]

Issue:
2002年05期
Page:
27-31
Column:
研究论文
publishdate:
1900-01-01

Article Info:/Info

Title:
A Study on N and P Cycling in Soil and Water Conservation Forest Composed of P.massoniana and Shrubs
Article ID:
1000-2006(2002)05-0027-05
Author(s):
XIE Jin shengCAI Li pingHUANG Rong zhenCHEN Yin xiuYANG Yu sheng
College of Forestry Fujian Agricultural and Forestry University,Nanping 353001,China
Keywords:
ErosionMixed forest of trees and shrubs P.massoniana Nutrient cycle
Classification number :
S718
DOI:
10.3969/j.jssn.1000-2006.2002.05.007
Document Code:
A
Abstract:
In this paper the accumulation and cycle of N and P elements in the community of soil and water conservation forest composed of P.massoniana and shrubs in Hetian Town,Changting County of Fujian Province has been studied. P.massoniana in mixed forest,the concentration of N and P in the aboveground fractions was in the order of leaves>stem bark>branches>stem wood and those in the below ground fractions increased with the decrease in root diameter,and those in each fraction were both higher than those of P.massoniana on the control(wasteland).The accumulation of N and P elements in this stand was up to 339.200 kg/hm 2 and 2.088 kg/hm 2 ,respectively,amount 100.6 and 69.6 times higher than that in control,of which 93.0% and 93.6% were accumulated in tree layer.Among the undergrowth,mosses accumulated the highest amount of both N and P.Amount of annual retention,return and uptake of N in mixed forest were 33.6,25.9 and 30.3 times higher,and that of P were 81.4,35.9 and 63.4 times higher than that in control,respectively,and each of return of N and P was 36.3% and 22.3% of uptake.

References

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Last Update: 1900-01-01