毛竹林土壤呼吸日变化特征研究

The Diurnal Variation of Soil Respiration in Phyllostachys heterocycla cv. pubescens Forest

采用Licor-8150对浙江富阳庙山坞森林生态系统定位研究站的毛竹林土壤呼吸进行连续原位和定位监测,同时对土壤温度和土壤湿度进行测定。结果表明,不同季节、不同深度的土壤温度呈现不同的日变化规律,土壤湿度在各个季节都没有明显的日变化,但不同季节,不同深度的土壤湿度却表现不一。土壤呼吸在不同季节呈现不同的日变化规律。春、夏、秋季的土壤呼吸值较高,日变化波动较大,呈现明显的单峰曲线,冬季土壤呼吸值较低,没有明显的日变化。

The diurnal variation of soil respiration in Ph. heterocycla cv. pubescens forest was continuously monitored in situ by using Licor-8150 Automated Soil CO2 Flux System in Zhejiang Fuyang Miaoshanwu Forest Ecosystem Research Station in the period from April 2010 to March2011,Meanwhile,the soil temperature and moisture were measured. The results showed that the diurnal variation in soil respiration rate in the forest obviously presented a peak curve in spring,summer and autumn,but in winter it was not obvious.