摘要
利用标准样方法研究毛竹林碳密度和碳贮量以及空间分布。结果表明 :毛竹不同器官碳密度波动在0 4 6 83～ 0 5 2 10g·g- 1 ,按碳密度高低排列依次为竹根 >竹秆 >竹蔸 >竹枝 >竹鞭 >竹叶 ;碳贮量在毛竹不同器官中的分配以竹秆占比例最大 ,为 5 0 97% ,其次为竹根 ,占 19 79% ,占比例最小的是竹叶 ,仅占 4 87% ;毛竹林生态系统中碳总贮量为 10 6 36 2t·hm- 2 ,其中植被层 34 2 31t·hm- 2 ,占了 32 18% ,枯落物和土壤层 (0～ 6 0cm) 72 131t·hm- 2 ,占了 6 7 82 % ;毛竹林乔木层碳素年固定量为 5 0 97t·hm- 2 a- 1 ,与粗放经营竹林相比 ,毛竹集约经营 10年后 ,竹林生态系统中碳贮量减少了 8 133t·hm- 2 ,但乔木层年净固定碳量增加了 0 5 89t·hm- 2 a- 1 。
Density, storage and spatial distribution of carbon in Phyllostachy pubescens forest were studied by means of sample plot. Carbon density of different bamboo organ ranged from 0.468 3 to 0.521 0 g·g -1, which was in order as follow: root>trunk>underground trunk>branch>underground stem>leaf. The organ distribution of carbon storage was 50.97for trunk, 19.79 for root and 4.87 for leaf. The total carbon storage in bamboo ecosystem was 106.362 t·hm -2, of which the above-ground green vegetation stored 34.231 t·hm -2,accounted for 32.18 ,and the forest floor and soil(0～60 cm horizon) stored 72.131 t·hm -2,account for 67.82. Annual carbon fixation of tree story in bamboo forest was 5.097 t·hm -2 a -1, which was 1.46 times of Chinese Fir at the fast growing stage, and 1.33 times of tropical mountain rain forest. Compared with traditional practice, after 10-year intensive management, total carbon storage in the bamboo ecosystem declined 8.133 t·hm -2, however, the net annual carbon fixation of tree story appeared an increase of 0.589 t·hm -2a -1.
出处
《林业科学》
EI
CAS
CSCD
北大核心
2004年第6期20-24,共5页
Scientia Silvae Sinicae
基金
浙江省科技攻关项目 ( 2 0 0 3C3 2 0 2 9)
