大兴安岭干旱阳坡各退化类型土壤与空气温湿度变化研究

摘要

Scrub and Quercus mongolica in south-facing slope and temperature and humidity of soil and air in north-facing slope in Daxing’an Mountains were determined by adopting soil and air automatic recorder.Result shows that the descending order of soil temperature is grass > bush-grass > Quercus mongolica forest > north-facing slope;average value of growing season in hassock is 6.01 degrees higher than that of the north-facing slope;the soil mois-ture is opposite to the soil temperature,which shows that the north-facing slope > Quercus mongolica forest >bush-grass> hassock,among of which north-facing slope is 78% higher than that of hassock;the difference of three kinds of temperature and humidity of air is small,these show that the change of temperature and humidity of soil are the important factors influencing the vegetation restoration of dry south-facing slope.%采用土壤和空气自动记录仪，对大兴安岭干旱阳坡的灌草丛和蒙古栎林以及阴坡的土壤温湿度和空气温湿度进行了测定。结果表明，土壤温度表现为草丛>灌草丛>蒙古栎林>阴坡，其中草丛生长季平均值比阴坡高6.01度，土壤含水量与土壤温度相反，表现为阴坡>蒙古栎林>灌草丛>草丛，其中阴坡比草丛高78%；但是三种类型空气温湿度差异均较小，这些表明土壤温湿度的变化是影响干旱阳坡植被恢复的重要因素。