摘要
羊草草地土壤呼吸的日进程呈倒“U”字型,CO_2释放主要在9～15时进行,其释放量占24小时总释放量的78.69％。土壤呼吸强度最大值(4.82CO_2g/m^2/天)出现在8月份,其季节变化规律与分解速率的变化相一致,二者的关系遵循指数方程。土壤呼吸与枯枝落叶分解相互关联,土壤呼吸可间接反映枯枝落叶分解的动态。呼吸强度与土壤温度和土壤水份呈正相关,呼吸强度随着这两个生态因子的上升而增加。
In Aneurolepidium chinense rangeland, the daily curve of soil respiration is like an inverted 'U', and the carbon dioxide from soil is mainly at 9～15 O'clock on the daytime. The quantity of carbon dioxide released in the time makes up 78.69％ of the total quantity released in 24 hours, The maximum value of the respiratory intensity is about 4.82 CO_2g/m^2, which takes place in August. The seasonal change of soil respiration is in keeping with that of the decomposition rate. The relationship between them follows the index equation. On the one hand soil respiration and litter decomposition are interrelated with each other, and on the other hand soil respiration may indirectly reflect the trends of the litter decomposition. There are positive correlationships between respiratory intensity and soil temperature moisture. Respiratory intensity increases along with the rises of the two ecological factors.
出处
《中国草地》
CSCD
1991年第5期39-41,共3页
Grassland of China
基金
国家自然科学基金
