摘要
在长白山森林生态系统研究中 ,对红松 (Pinus koraiensis)针叶凋落情况及其分解过程进行研究 ,表明 ,红松针叶一般可存活 3～ 4 a,调查中存活最长的为 6a。红松针叶的寿命与光照密切相关 ,在针叶密集及透光不足的地方针叶寿命较短。红松针叶凋落后 ,在林地上分解较快 ,一般 4 a后其干重保持率为 1 6.6%。模拟实验证明 ,红松针叶的分解率与海拔和植被类型密切相关。在海拔低的红松阔叶林下 ,因气温高 ,分解较快 ;在海拔较高的云冷杉红松林和岳桦林中分解速度变慢 ;
The study on fall and decomposition of Pinus korainsis needle is deficient in Changbai Mountain forest ecosystem. This article fills the need through investigations and experiments. The results show that Pinus korainsis needle usually lives for 3~4 years, and the longest is 6 years. The longevity has close relation with light. Needle decomposes faster in shady place where light is lack. After the needle falls, its decomposition becomes faster. Dry weight remains 16.6% after four year decomposition which concerns with altitude and vegetation type. The simulation experiment shows that the decomposition is fast in Pinus koraiensis broad leaved forest because of high temperature and low altitude, and it is slow in dark coniferous forest and Betula ermanii forest and slowest at Alpine tundra belt.
出处
《生态学报》
CAS
CSCD
北大核心
2001年第8期1296-1300,共5页
Acta Ecologica Sinica
基金
973项目 (G1 9990 4 3 0 7-1 )
中国科学院知识创新项目 (KZCX2 -4 0 6-1 3 )资助
关键词
红松
针叶
凋落
分解率
Pinus koraiensis needle
fall
decomposition rate
