樟树人工林内和林内空地土壤温度分布的研究

Studies on soil temperature distribution of camphor plantations and forest clearance area

以一年的观测数据为依据,剖析了樟树人工林内和林内空地地表温、土壤温度、温度梯度分布及其波动状态和土壤热力流向。结果表明:林内和林内空旷地土壤温度特征不一样,林内空旷地的地表温和各层土温的年、月、日均值及其振幅,都显著高于树林内,两者的土壤温度梯度和热力流向与途径有着较大差异;林内和林内空旷地地表最高、低温出现时刻不一样,林冠有推迟地表最高温出现的作用;林冠的遮拦,以及枝叶凋落物对地表的覆盖,使林内土温振幅衰减速率加快,土温的波动幅度减少,为树木的生长创造了适宜的土壤环境。

Based on the observation data in one year, the surface temperature, soil temperature, distribution of temperature gradient and state of temperature fluctuation, and soil thermal flow direction in the clearance area of the camphor plantation were investigated and analyzed. The results show that the soil temperature characteristics of the plantation and the clearance area were unlike, the year, month and day values of the surface soil temperature, that of soil temperature in each layer and the amplitude in the clearance area were higher than those in the forest, the soil temperature gradient and heat flow direction and the way had a bigger difference; the maximum temperature and the minimum temperature didn＇t appeared at the same moment, the canopy delayed the highest surface temperature to appear; that the canopy blocked or the branches and leaves litter covered the earth＇s surface could make the plantations soil temperature amplitude decay to be faster, reduced the fluctuation range of soil temperature, and created the proper soil environment for the trees growth.