Carbon and Nutrient Pools of Coarse Woody Debris in a Natural Forest and Plantation in Subtropical China

Abstract

福建三明格氏栲天然林及在其采伐迹地上营造的33年生格氏栲人工林和杉木人工林粗木质残体现存量与季节动态、C库及养分库的研究表明,格氏栲天然林、人工林和杉木人工林粗木质残体现存量分别为1 32、0 4 6和0 2 3t·hm- 2 。3种林分粗木质残体现存量的季节变化模式均为夏季>冬季>秋季>春季。格氏栲天然林粗木质残体C贮量为0 78t·hm- 2 ,分别是格氏栲人工林和杉木人工林的4 1 1倍和7 0 9倍;格氏栲天然林粗木质残体C库与2种人工林间差异显著(P <0 0 5)。格氏栲天然林、人工林和杉木人工林粗木质残体养分贮量分别为1 4 1 6、2 90和0 95kg·hm- 2 ;格氏栲天然林粗木质残体中各种养分贮量均最高。与人工林相比,天然林粗木质残体现存量、C和养分贮量均最大。 【英文摘要】 During the past decades, large scale natural forests had been converted to fast growing and high yield commercial plantations to meet the demands for timber, fuel material, and other forest products. Some silvicultural measures, such as planting pure stands, clear cutting and slash burning, were widely applied during this conversion. Yield decline and land deterioration in such disturbed ecosystems had become serious. In this context, the ecological comparisons between natural forests and plantations have...福建省重大基础研究项目 (2 0 0 0F0 0 4 ) ;; 高等学校优秀青年教师教学科研奖励计划资助