论文部分内容阅读
杉木是我国南方重要的速生用材树种.它生长快,材质好,用途广,在适宜的气候、土壤条件下,速生期内每年平均胸径生长1厘米以上,树高生长可达1米,材积每亩可增加1立方米.因此,深受群众喜爱.我省栽植杉木历史较悠久.几年前,在宜兴茗岭公社岭下大队和吴县西山等地,尚保留百年以上的老杉木.最近在南京紫金山麓又发现几十株40年生的大杉木,其中最大的一株高达17.10米,胸径35.8巴厘米,材积近1立方米.解放后,我省为了改变缺材少林局面,曾几次掀起发展杉木的热潮.现在,除了在苏南丘陵山地有成片杉林外,在苏北的阜宁、射阳、滨海、南通和里下河地区的宝应、江都等地,也有零星栽植.至目前为止,全省现有杉木林面积已达50多万亩.
It grows fast, the material is good, the use is wide, under suitable climate and soil conditions, the average annual DBH growth rate is more than 1 centimeter per year and the tree height can grow up to 1 meter. Acres can increase 1 cubic meters, therefore, loved by the masses .Is the province has a long history of fir plantation .A few years ago, in Lingxi Gongling Lingxia Brigade and Wuxian Xishan and other places, still retain more than a century old fir. Recently Nanjing Zijin foothills also found that dozens of 40-year-old large fir, of which the largest one as high as 17.10 meters, diameter 35.8 bar, the volume of nearly 1 cubic meter. After the liberation, the province in order to change the situation of missing material Shaolin, has set off several times The development of the craze of fir.Now, in addition to a piece of cedar forest in the hills of the southern Jiangsu Province, there are scattered planting in Funing, Sheyang, Binhai, Nantong and Lixiahe areas in northern Jiangsu Province, up to now Up to now, the existing area of Chinese fir forest in the province has reached over 500,000 mu.