期刊论文

中文

中南林业科技大学学报

1673-923X

2005

25

6

12-16

10.3969/j.issn.1673-923X.2005.06.002

(2000-076):国家野外台站科研项目 (2002-12-20):科技部科技基础条件平台建设计划 (2001-7;2001-29):林业部科研项目

本校为第一机构

根据定位观测的数据,探讨了杉木人工林凋落物量及其分解过程中碳素释放率.结果表明,14~16年生杉木人工林平均每年约有1 201.24 kg.hm-2凋落物,其中以针叶为最多,占凋落物总量的69.8%,其次是小枝,占24.54%,落果和其它碎屑物质仅占5.63%.不同组分的碳素含量高低顺序排列为:针叶>落果>碎屑>枯枝,变异系数在3.36%~8.24%之间.针叶、枯枝的碳素含量均随时间的推移而下降,而其释放率均随时间的推移而增大,针叶中碳素的释放速率明显高于枯枝中碳素的释放速率.凋落物中碳素的释放规律与总干物质的分解速度并不完全一致.杉木人工林年凋落物碳素释放量约为149.25 kg.hm-2a-1,占凋落时碳素量(548.24kg.hm-2-...

Based on the date collected from located observation, annual amount of litter and carbon release in its decomposition process were studied in Chinese fir plantation at Huitong, Hunan. Results show that the average annual litter-fall was 1 201.24 kg/hm^2 （dry mass） in the 14-16-year-old Chinese fir plantation, of which needles accounted for 69.84%, twigs, 24.54%, fallen fruit and other fragments, 5.63%; that its carbon contents had some difference, varying with the components of litter-fail, its carbon storage in different components was in th...