环境因子对胶南沿海防护林土壤呼吸的影响

对胶南沿海防护林灌草带和混交林的土壤呼吸速率及其环境因子进行了研究，结果表明：两个类型林地的土壤呼吸速率日变化均呈现出单峰式的变化规律；地表温度是影响土壤呼吸速率的最关键因子，与两个类型的土壤呼吸速率都呈极显著正相关关系，相关系数分别是0．958、0．980；气温也是影响土壤呼吸速率的重要因素，与灌草带土壤呼吸速率呈显著正相关，相关系数是0．857；大气温度、土壤湿度和风速对土壤呼吸速率都有一定影响，但不显著，其中风速对土壤呼吸的影响有待于进一步研究。通过逐步回归方法，得出海防林土壤呼吸速率的主要环境因子与土壤呼吸速率之间的回归模型。

Effects of Environment Factors on Soil Respiration Rate in Coastal Protective Forests

The effects of environment factors on soil respiration rate in coastal protective forests have been studied separately on the shrub forest and the mixed plantation. The results indicate that the daily soil respiration rate of the two samples varied with a regular single apex rhythm;the soil surface temperature is the most important factor influencing on the soil respiration rate, which has the most prominent positive correlation with the soil respirtion rate of the shrub forest and mixed plantaion respectively, and the correlation coefficie nt separately is 0.958, 0. 980; air temperature is also an important factor, and it has an obvious positive correlation with the soil respiration rate on the shrub forest, and the correlation coeNicient is 0.857; the air moisture at 1.5m above the surface, the soil moisture and the wind all have some but not obvious influen ce on the soil respiration rate; the wind velocity have a complicated relationshi pwith the soil respiration rate, and their correlation has to be studied in the further. Through the methods of main copmonents analysin and multiple linear regressions, the main environment factors were found and two multiple linear regressi on models between the soil respiation rate and envionment factos were set up.