西江中下游生态公益林小气候特征

Microclimate Characteristics of Non-Commercial Ecological Forest in the Middle-Downstream of Xijiang River

对广东省德庆县三叉顶自然保护区的生态公益林气温、相对湿度和太阳辐射进行了定位观测,以空旷地为对照,分析生态公益林的小气候效应.结果表明:在2006年8月和2007年5月典型晴天,生态公益林林地气温平均比空旷地气温分别低1.7和1.6℃,林地相对湿度平均比空旷地相对湿度分别高8.3%和2.2%,2006年8月和2007年5月典型晴天森林平均透射率分别为5.9%和7.7%;空旷地与林内的气温、相对湿度和太阳辐射相关性极显著,相关系数分别为0.979、0.879和0.889.

Air temperature, relative humidity and solar radiation within the non-commercial ecological forest located at Sanchading Nature Reserve in Deqing County were observed, and the mieroclimate regulation of the ecological forest was analyzed by comparing its effect with that on bare land. The results showed that, in typical sunny days in August 2006 and May 2007, air temperature on bare land was higher than that of ecological forest, with the average of 1.7 and 1.6℃, respectively. Relative humidity in ecological forest was higher than that of bare land, with the average of 8.3% and 2.2%, respectively. Average transmission rate of ecological forest in the two years were 5.9% and 7.7% , respectively. Air temperature, relative humidity and solar radiation in forest and on bare land showed significant correlations, with a correlation coefficient of 0. 979, 0.879 and 0.889, resoectively.