林业科学2011，Vol.47Issue(12)：17-21,5.
南亚热带红椎马尾松纯林及其混交林生物量和生产力分配格局
Allocation Pattern of Biomass and Productivity for Three Plantations of Castanopsis hystrix, Pinus massoniana and Their Mixture in South Subtropical Area of Guangxi, China
摘要
Abstract
The three 27-years old plantations, mixed stand of Pinus massoniana and Castanopsis hystrix (MCP) , pure stand of Pinus massoniana stand ( PPS) and pure stand of Castanopsis hystrix stand ( PCS) , were investigated in the Experimental Centre of Tropical Forestry, Chinese Academy of Forestry which located in Pingxiang County of Guangxi. By harvesting and measuring the average diameter of trees collected from the above three stands, we established a group of allometric growth equations to estimate their allocation patterns of biomass and net productivity. The results showed that the total biomass for PCS, MCP and PPS were 94. 797, 212. 435 and 155. 638 t-hm~ , respectively, and the tree layer accounted for more than 95% of the total biomass. The biomass of other layers was in the order as : litters (0.56% ~ 3. 26% ) > herbs (0.24% ~0.85%) > shrubs (0.25% ~0.37%). For the biomass of tree layer in the three stands, allocation to stems was the greatest, ranged from 49.31% to 62.25%, followed by roots (17.16%), branches (11.76%), bark (6. 84% ) , and then leaves (1. 99% ) , for PCS; but for PPS and MCP, the order was branches( 18. 39% - 19. 98% ) > roots (14.48%~17.72%) > leaves (5.55% ~8.80%) > barks (4. 19%~5.57%). The net productivity in the studied plantations was in the following order: PCS(3. 369 t.hm-2a-1) <MCP(5. 628 t.hm-2a-1) <PPS(7. 781 t.hm-2a-1).关键词
红椎人工林/马尾松人工林/混交林/生物量/生产力Key words
Castanopsis hystrix plantation/Pinus massoniana plantation/mixed stand/biomass/net productivity分类
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覃林,何友均,李智勇,邵梅香,梁星云,谭玲..南亚热带红椎马尾松纯林及其混交林生物量和生产力分配格局[J].林业科学,2011,47(12):17-21,5.基金项目
林业公益性行业科研专项(200904005) （200904005）
