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我场位于苏、浙、皖三省交界的宜兴山区,地处中亚热带北缘。山岭系浙江天目山余脉,海拔250—300米,属中亚热带气候。为了探索杉木在我地发展的可能性,在1957年开始小面积栽植试验,1963年进行大面积营造,目前已发展到17000余亩。其中分布在平山、低山、山槽里的9000余亩长势旺盛,最高的已达13米,一般的在7米左右;最大的胸径25厘米,一般的10厘米左右。例如“林中”2.5亩的15年生杉木林,虽然间伐进行较迟,但由于加强了管理,已取小径材17立方米,林内蓄积量尚有23.5立方米,最大树高12米,最大胸径22厘米,实践证明,我场的自然条件虽不及杉木的中心产区,但通过人为的努力,掌握适地适树的原则,讲究造林技术,并切实加强管护,杉木成材是大有希望的。
My field is located in Jiangsu, Zhejiang and Anhui provinces at the junction of Yixing Mountain, located in the northern edge of the Central Asia. Mountain Department of Mount Tianmu Mountain in Zhejiang Province, 250-300 meters above sea level, is a subtropical climate. In order to explore the possibility of the development of Chinese fir in my area, a small-area planting experiment was started in 1957 and large-scale cultivation was carried out in 1963. At present, it has grown to more than 17,000 mu. Among them, more than 9,000 mu are located in Pingshan, Hilly and Slot. The highest is 13 meters and the average is about 7 meters. The largest diameter at breast height is 25 centimeters and the average is about 10 centimeters. For example, the 15-year-old Chinese fir forest with 2.5 mu in the middle of the forest, although the thinning was carried out later, has taken 17 cubic meters of small-diameter timber due to the strengthening of management. There are 23.5 cubic meters of forest reserves and the maximum tree height is 12 meters. 22 cm. Practice has proved that though the natural conditions of our field are not as good as those of the center of Chinese fir, it is hopeful that through artificial efforts, we should master the principle of adapting to the tree, pay attention to the afforestation technology and effectively strengthen the management and protection. .