气候波动对我国亚热带地区杉木、毛竹生态环境影响的研究

A STUDY OF THE EFFECTS OF CLIMATIC FLUCTUATION ON CHINESE FIR AND BAMBOO ECOLOGICAL ENVIRONMENT IN SUBTROPICAL REGIONS OF CHINA

文章对我国亚热带地区杉木、毛竹生长发育速度与气候因子的关系作了分析。确定月平均气温２０～２６℃月降水量１１０～２３０ｍｍ为杉木速生期水热指标；日平均气温１５～２５℃、年降水量１２００～２５００ｍｍ为毛竹速生丰产水热指标。指出杉木、毛竹速生丰产的气候生态环境在亚热带丘陵山区优于平原，山区的杉木、毛竹适宜种植海拔高度主北亚热带为２００～７００ｍ、中亚热带为３００～１０００ｍ、南亚热带为４００～１２００ｍ；在水平方向，中亚热带较南，北亚热带地区更具有杉、竹速生丰产的气候优势，同时指出，气候干湿变化对亚热带地区杉木、毛竹生长量、成材年限、材质和布局的影响比气候冷暖变化更具有重要生态意义。

The relationships between climatic factors and the speed of Chinese fir and bamboogrowing are investigated. The water-heat indices of mean monthly temperature 20～26℃ and monthly precipitation 110～230 mm for the Chinese fir fast growing period,and mean daily temperature 15～25℃ and annual precipitation 1200～2500 mm for thebamboo are assessed,respectively,Furthermore,the climatic ecological environmentfor Chinese fir and ban1boo being high yield and fast growing in subtropical hilly andmountain regions are better than in the plain。Its planting height of 200～700 meters issuitable for the north subtropical mountain regions, 300～1000 meters for the middlesubtropical mountain regions ,and 400～1200 meters for the south subtropical mountainregions, respectively, Especially, the climatic conditions in the middle subtropicalmountains are better than in other regions。 Aiso,it is more important effect of advanceclimatic change of drought-humid on increment in growth or volume,wood quality anddistribution of production of Chinese fir and bamboo than that of variation of cold-warmin subtropical regions。