摘要
本文对杉木[Cunninghamia lanceolata(Lamb.)Hook.]北缘产地的安徽省太平县和金寨县两个地区的杉木人工林进行了气候生态学方面的研究,通过对杉木生长过程中生理指标的实测以及杉木径向年轮指数与相应年份气候因子之间的单因子、多因子和多因子逐步回归分析,认为杉木利用散射光的能力比利用直射光更为有效。生长期内杉木净光合作用的最适温度范围是25—29℃,生长期内的相对湿度对杉木生长影响较大。初步证明金寨县在杉木生长期内(4—10月)的相对湿度和日照百分率是影响杉木径向生长的两个主导性因子。
Cunninghamia lanceolata(Lamb,)Hook is a native plant of the moist subtropics in eastern China,In the present paper,the C.lanceolata artifical forests,which were cultivated in the Tai- ping and Jinzhai counties of Anhui province where were their northernmost marginal regions, were mainly studied on the relations between the climatic ecological factors and the physiologi- cal activities and the growth of the annual ring width.The results based on surveying and companing the microclimatic ecological factors including the intensity of light,temperature, relative humidity and wind velocity and the physiological activities of photosynthesis,respira- tion,transpiration and water potential of leaf tissues showed that the astigamitic tight was more effective than the direct light to the growth of C. lanceolata, and the optimum temperature scope of net photosynthesis of C. lanceolata is from 25~C to 29~C in the Taiping County. Ac- cording to the analysis of the annual ring width of C.lanceolata regarding the climatic ecolo- gical factors by the mono-correlative,polycorrelative and stepwise multiple linear regression, the author is convinced that the relative humidity and percentage of sunshine time during the growth period(from April to October)are the most important factors among the climatic eco- logical factors affecting the growth of C.lanceolata in the Jinzhai county.So the author sug- gests that C.lanceolata has some potentiality for development in these regions mentions above.
关键词
杉木
气候生态因子
生理林标
Cunninghamia lanceolata (Lamb) Hook
Climatic ecological factors
Physiological activities
Linear regression analysis
Important ecological factors
Yearly ring index
