| 杉木、观光木混交林凋落物能量归还量初步研究(英文) |
| |
| 引用本文： | 杨玉盛,陈光水,何宗明,李秀芳,陈银秀.杉木、观光木混交林凋落物能量归还量初步研究(英文)[J].中国林学,2001,3(1). |
| |
| 作者姓名： | 杨玉盛 陈光水 何宗明 李秀芳 陈银秀 |
| |
| 作者单位： | 福建农林大学资源与环境系,南平,353001 |
| |
| 摘 要： | 通过对杉木、观光木混交林及杉木纯林群落凋落物的能量年归还量及能流的季节变化进行研究 ,结果表明 ,混交林凋落物的能流量达 12 .6 4 8× 10 6J·m-2 ,比纯林的高 4 .2 % ;在各目的树种凋落物组成中 ,落叶能流量均占大部分 ;混交林和纯林群落太阳能进入凋落物的转化效率分别为 0 5 6 %和0 5 4 % .混交林和纯林中杉木凋落物能流一年中分别在 3,8和 12月出现 3个高峰 ,其中落叶、落枝、落花和落果能流的月变化与之相似 ,这与杉木的小枝整体凋落方式有关 ;混交林中观光木凋落物能流在1,5和 8月出现高峰 ,其中落叶和落枝能流月变化与之相似 ,但落花能流仅出现在 3～ 5月 ,而落果仅发生在 1月和 3月 .各群落凋落物能流月变化模式与其中杉木凋落物能流变化模式基本一致 .混交林和纯林凋落物能流的季节变化为春季 >冬季 >夏季 >秋季 ,但混交林凋落物能流量季节间变动小于纯林的 .
|
| 关 键 词： | 杉木 混交林 凋落物 能量流动 季节动态 |
Seasonal Dynamics of Energy Return Through Litterfall of A Mixed Forest of Chinese Fir and T. odorum |
| |
| Yang Yusheng,Chen Guangshui,He Zongming,Li Xiufang,Chen Yinxiu.Seasonal Dynamics of Energy Return Through Litterfall of A Mixed Forest of Chinese Fir and T. odorum[J].Forestry Studies in China,2001,3(1). |
| |
| Authors: | Yang Yusheng Chen Guangshui He Zongming Li Xiufang Chen Yinxiu |
| |
| Abstract: | Based on the measurement of monthly litterfall and their gross caloric values, the seasonal dynam ics of energy return through litterfall were determined in a pure and a mixed T. odorum ( Tsoongiodendron odorum Chun) forests with Chinese fir ( Cunninghamia lanceolata (Lamb.) Hook. ) in Sanming, Fujian Province. Annu al energy return through litterfall was estimated as 12.648 × 106J@ m-2 for the mixed forest, being 4.2% higher than that of the pure forest, and a large proportion of the energy return comprised leaf litter. The conversion effi ciency of solar radiation energy into litterfall was 0.56 % for mixed forest and 0.54 % for pure forest, respectively.The monthly energy flux in litterfall of Chinese fir showed a three-apex curve, peaked in March, August and De cember, respectively, which was similar to that in various fractions of leaf, twig, flower and fruit litter. The con sistency in monthly patterns among different litter fractions of Chinese fir was attributed to their solid connections all the while. The monthly energy flux in litterfall of T. odorum culminated in January, May and August, the same was true for its leaf and twig litter. However, energy flux in flower litter only occurred during March to May and that in fruit litter appeared in January and March. The monthly dynamics of energy flux through litterfall of the two forests were both determined by their respective litterfall pattern of Chinese fir. Seasonal energy flux in litter fall for both mixed and pure forests followed the sequence of spring ＞ winter ＞ summer ＞ autumn, but fluctuations in the former were less distinct than those in the latter. |
| |
| Keywords: | Chinese fir mixed forest litterfall energy flux s easonal dynamics |
| 本文献已被 CNKI 万方数据 等数据库收录！ |
|
