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《Journal of Agricultural University of Hebei》 2006-05
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Study on the biomass structure and distribution of natural secondary forest of Pinus massoniana

ZHANG Zhi-jun~1,WANG Yan-hui~2,YUAN Yu-xin1,LI Zhi-yong~2,CAO Lei~3,ZHANG Guo-zeng~4,YU Peng-tao~2,WANG Ying~1 (1.College of Forestry,Agricultural University of Hebei,Baoding 071000,China;2.Research Institute of Forest Ecology,Environment and Protection,CAF,Beijing 100091,China;3.Environment and Protection Bureau of Chengde City,Chengde 067000,China;4.Park Department of Garden Bureau,Shijiazhuang 050011,China)  
The study on the structure and distribution character of biomass of a 46-year-old natural secondary forest of Pinus massoniana in Chongqing and its productivity shows,that the primary productivity of the forest ecosystem is 8.34 t/(hm~2·a).The biomass is 146.08 t/hm~(2),the distributing sequence of the biomass of the forest ecosystem is: tree stratum(87.43%)humus layer(5.65%)undergrowth(5.46%)herb(1.46%).The biomass of the tree layer is 127.72 t/hm~(2) and biomass distributing sequence of different organs is: trunk(72.82%)branch(11.19%)root(9.27%)bark(4.43%)needle(2.29%).Regarding the vertical structure of biomass of each type of organ,the biomass of trunks under the height of 10m accounts to 81.13% of its total;the biomass of branches between 12 m and l6m accounts to 82.25% of its total;the biomass of one-year-old needles between 12 m and 18m accounts to 93.25% of its total;and the biomass of roots in the soil layer of 0-40 cm accounts to 76.45%.The present stage productivity of the community is lower and its structure is irrational.The forest-type of the forest community and productivity structure of tree layer should be regulated so as to improve the integrate effects of the community.
【Fund】: 国家林业局天然林保护工程科技支撑课题“天然林保护工程区森林灾害预防技术(TBKJ2003-04)”;; 中挪合作项目“中国酸沉降综合影响观测研究”;; 国家林业局森林生态环境重点实验室资助
【CateGory Index】: S791.248;Q948
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