摘要
在羊草草原上当年羊草的枯死体大部分以立枯体的形态存在 ,立枯量约占枯死量的 75.3 4 %。立枯体与凋落物的分解速率的季节变化趋势基本相同 ,均呈抛物线型。每月凋落物的分解速率均大于立枯体分解速率 ,二者最小值均出现在1 0月份。其中立枯体分解速率最大值出现在 7月 ,凋落物出现在 8月。立枯体和凋落物损失率的季节变化曲线均呈指数形式 ,立枯体的年损失量约占凋落物损失量的 77.1 1 %。立枯体的分解与水热因子均呈指数正相关 ,随着降雨量和温度的增加分解速率逐渐加快。
A large part of dead body of Aneurolepidium chinense existed as standing and it shares up to 75.34% of total dead matter's weight in a year in Songnen grassland.The seasonal decomposition rates of standing dead litter and litter were similar.Both of them took parabolic type.The decomposition rate of litter was greater than that of standing dead litter in every month.The least values of their decomposition rates were both in October and the greatest value of decomposition of standing dead litter was in July,whereas the litter in August.The seasonal changes of standing dead litter and the litter loss rates had a shape of an exponential curve.The loss weight of standing was 77.1% of the litter loss weight in a year.The relationships between standing decomposition and rainfall and temperature were all exponential positive correlation and the decomposition rate quickened gradually with increase of rainfall and temperature.
出处
《生态学报》
CAS
CSCD
北大核心
2000年第5期784-787,共4页
Acta Ecologica Sinica
基金
国家自然科学基金资助项目!( 3 9970 53 7)
关键词
立枯体
分解
生态因子
羊草
松嫩草原
standing dead litter
decomposition
ecological factor
