Duan Wen-biao, Wang Jing, Li Yan
College of Forestry, Northeast Forestry University, Harbin 150040, China.
Ying Yong Sheng Tai Xue Bao. 2008 Dec;19(12):2561-6.
By the help of HOBO automatic weather stations, the microclimatic characteristics of different size forest gaps in Pinus koraiensis-dominated broadleaved mixed forests in Xiaoxing' an Mountains were studied during growth season, with closed forest and bare ground as the control. The results showed that the diurnal variation of illumination, ground temperature, and air temperature of the gaps and the controls, as well as the change trend of the microclimatic factors during growth season, all presented a single peak curve. The diurnal variation pattern of relative humidity of the gaps and the control was high-low-high, being higher in early morning and evening and lower at noon. The relative humidity during growth season also presented a single peak curve, and was the highest for closed forest, followed by small, medium, and large forest gaps, and bare ground. The amount and the times of precipitation tended to decrease with increasing forest canopy, and the precipitation amount in large gaps was about 1.4 times as much as that in small gaps. During growth season, the maximum wind speed above bare ground, large, medium, and small gaps, and closed forest was 3.34, 2.97, 2.87, 2.41 and 1.84 m x s(-1), respectively.
借助HOBO自动气象站，在生长季对小兴安岭红松阔叶混交林中不同大小林隙的小气候特征进行了研究，并以郁闭林和裸地作为对照。结果表明，林隙和对照的光照、地温、气温的日变化，以及生长季内小气候因子的变化趋势均呈单峰曲线。林隙和对照的相对湿度日变化规律为高-低-高，清晨和傍晚较高，中午较低。生长季内相对湿度也呈单峰曲线，郁闭林最高，其次是小林隙、中林隙、大林隙和裸地。降水量及其次数随林冠层增加而趋于减少，大林隙降水量约为小林隙的1.4倍。生长季内，裸地、大林隙、中林隙、小林隙和郁闭林上方的最大风速分别为3.34、2.97、2.87、2.41和1.84 m·s-1。
