南亚热带鹤山三种人工林小气候效应对比

先锋生态系统的小气候效应是评价它们在植被生态恢复过程中恢复效能的主要指标之一。对14龄的马占相思(Acacia mangium)、荷木(Schima superba)、湿地松(Pinus elliotii)人工林小气候效应的对比研究表明，荷木林的降温保湿效应最好。气温(最高温、最低温和平均温)和土壤温度(地表最高温、最低温和平均温度)均为3种林分中最低。荷木林林内气温一般比马占相思林和湿地松林低0．1～0．5C，地表和土壤温度一般低0．3～2．5C，相对湿度高1．2％。对荷木林和湿地松林温、湿度垂直方向上4个层次(距地0．5m，2．0m，4．0／5．0m，9．0m)上的观测结果表明，湿季林内温度随高度增加而增加；在最冷月(1月份)时，林内温度随高度增加而减小。无论是干季还是湿季，林内湿度都随林分高度的增加而减小。结合林分结构调查、森林土壤养分含量等资料。初步认为，南亚热带地带性森林植被人工恢复实践中，荷木等本地树种更为适宜。

Comparison of microclimatological effects of three plantations in Heshan of the lower subtropical, China

Regulation of microclimate is one of the major functions of forest ecosystems. After establishment of pioneer forest ecosystems to restore the regional primary forest vegetation, the function of pioneer ecosystems needs to be monitored in order to assess the successfulness of the restoration projects. Microclimate regulating capability is among the important facets of the assessment. Different types of pioneer forests were established in the abandoned subtropical grass slope of Heshan of Guangdong province ...