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根据杉木主要生物学特性,我所在引种试栽成功的基础上,于1972年在刺槐林下营造杉木纯林千余亩.定植后第三年刺槐全部伐除,5一7年郁闭成林.为了促进杉林的速生丰产,于1978、1979年作了较大面积的抚育间伐.在1983年进行第二次抚育间伐的同时,对林分的生长量和生理状况作了实测和观察.现将结果整理如下:总渠阜宁堤段的环境条件我所经营管理的苏北灌溉总渠阜宁堤段,地处北纬33°48′,东经119°30′一48′,是亚热带和暖温带的交接处.年平均气温14℃,最高37.5℃,最低-15.4℃,但极温出现的年分并不多.年降雨量1017.l毫米,主要集中在6、7、8、9四个月.空气相对湿度81一83%.
Based on the main biological characteristics of Chinese fir and the introduction of the successful trial planting, we planted more than 1,000 mu of Chinese fir plantation under the acacia forests in 1972. All the acacia species were planted in the third year after planting, In order to promote the fast-growing and high-yielding of Cunninghamia lanceolata, a large area of tending and thinning was conducted in 1978 and 1979. The growth and physiological status of the stand were measured and observed at the same time as the second tending and thinning in 1983. The results are summarized as follows: Environmental Conditions of Funing Embankment Section of Canal Canal Funing embankment section of the Northern Jiangsu Irrigation Canal, which is run by our administration, is located at 33 ° 48’N and 119 ° 30’-48’E, and is subtropical and warm Temperate junction. The annual average temperature of 14 ℃, the highest 37.5 ℃, the lowest -15.4 ℃, but the temperature does not appear much in the year. The annual rainfall of 1017.l mm, mainly in the 6,7,8,9 four Month. Relative humidity 81 to 83%.