摘要
依据853株标准木、425块标准地实测资料对中国各地油松单木生物量、林分生物量及林分第一性生产力进行了分析比较。
Based on 853 sample trees and 425 plots, the biomass of individual tree, the biomass of stands and the net primary productivity of Chinese Pine (Pinus tabulaeformis Carr. ) forests are studied. The allom-etric equation lnW=a+b ln(D2H) is fit to every component of the biomass of individual tree. The ratios of the stem, of the branch and of the leaf to the biomass aboveground are around 70%, 20%and 10% respectively. The underground biomass is about 23% of the aboveground biomass. The mean biomass of stands is around 60t/ha for 14-29year old stands and 130t/ha for 30-70 year old stands. The regression equation lnW=a + b ln(pD2H) is fit to each component of the biomass of a stand. The net primary productivity of Chinese Pine stands averages around 9 t/ha · a. The hightest is 12 for east Liaoning and the lowest is 6 for west Liao-ning. The productivity (NP) increases with the increase of precipitation (P), NP=- 0.545 + 0.0143P. The productivity of underground biomass is around 25% of that of aboveground. The average leaf efficiency(NP/Wleaf) is 1.3t/a·t, the hightest 1.74 is found in east Liaoning and the lowest 0.87 in north Hebei. The average productivities of Chinese Pine forests in 4 climatic regions are : (Ⅰ) the warm temperate semi-moist region 7 t/ha·a; (Ⅱ) the warm temperate wet semi-moist region 9; (Ⅲ) the warm temperate moist region 11. and (Ⅳ) the subtropical moist region 14.
出处
《北京林业大学学报》
CAS
CSCD
北大核心
1989年第4期1-10,共10页
Journal of Beijing Forestry University
关键词
油松
生物量
生产力
Chinese Pine, biomaas, productivity
