学术
川西亚高山高山典型森林细根生物量及其碳储量特征
刘利[1] 张健[1] 杨万勤[1] 汪明[2] 薛樵[2] 董生刚[2]
[1]四川农业大学林业生态工程重点实验室,四川雅安625014 [2]四川省理县林业局,四川理县623100
摘 要:
细根在森林生态系统物质循环和能量流动中具有十分重要的和不可替代的作用。为了解川西亚高山/高山森林生态系统功能,研究了川西亚高山/高山冷杉林（PFF）、20 a生和10 a生粗枝云杉林（SF20和SF10）以及红桦次生林（BF）的细根生物量及其碳储量。所有生态系统的细根生物量及碳储量均随着土壤深度增加而递减,并与土壤剖面结构和物种有关。61.5%细根分布在0-20 cm层,13.3%和25.2%细根分布在有机层和深层土壤。由于表层土壤具有较高的养分含量,因而吸收根系分布在表层土壤有利于林木的生长发育。PFF、SF20、SF10和BF的细根生物量分别为1489 kg·hm^-2、938 kg·hm^-2、838 kg·hm^-2、773 kg·hm^-2,根系碳储量分别为0.775MgC.hm-2、0.469 MgC·hm^-2、0.419 MgC·hm^-2、0.387 MgC·hm^-2。[著者文摘]
文章出处:
《四川林业科技》-2008年29卷1期 -7-10页
栏目信息:
分 类 号:
文献标识码:
A
文章编号:
1003-5508（2008）01-0007-04
Biomass and Carbon Stock of Fine Roots in the Representative Subalpine and Alpine Forests in Western Sichuan
LiU Li, ZHANG Jian, YANG Wan-qin, WANG Ming, XUE Qiao, DONG Sheng-gang （ 1. Key Lab of Forestry Ecological Engineering, Sichuan Agricultural University, Ya＇an 625014,Sichuan; 2. Lixian Forestry Office, Lixian County 623100, Sichuan）
Abstract:
The fine root plays a significant and irreplaceable role in material cycle and energy flow of the forest ecosystem. Biomass and carbon stock of fine roots in primary fir （Abies） forest （PFF）, spruce （Picea asperata） forest of 10 years and 20 years（SF10 and SF20） , and birch （Betula albo-siensis） secondary forest （BF） were investigated in order to understand the ecosystem function in the subalpine and alpine forest ecosystem. Biomass and carbon stock of fine roots decreased along with the increase of soil depth, and depended on soil profile construction and tree species. On an average, about 61.5% of fine roots grew in upper soil layer from 0 to 20 cm, and 13.3% and 25.2% of fine roots were found in organic layer and deep soil, respectively. The distribution characteristics of fine roots in the soil profile were favorable for tree growth owing to higher nutrient concentration in the upper soil layer. PFF had the highest biomass（ 1489 kg·hm^-2） , followed by SF10（938 kg·hm^-2） , SF20（838 kg·hm^-2） , and BF（773 kg·hm^-2）. Correspondingly, carbon stock of fine roots were 0.775 MgC·hm^-2,0.469 MgC·hm^-2, 0.419 MgC·hm^-2 and 0.387 MgC·hm^-2, respectively.[著者文摘]
Key words:
Fine root, Biomass, Representative forest, Carbon stock
基金资助:
国家“十一五”重大科技支撑计划课题（2006BAC01A11）、四川省青年科技基金项目（07JQ0081）、四川省重大应用基础研究计划项目和四川农业大学“人才引进”项目
更多>>免费文章
cqvip.com