一、杉木生长区区划的意义及其研究概况杉木是我国南方重要的用材树种,栽培地区很广,南北跨三个亚热带,东西从东南沿海丘陵台地到西部云贵高原,地形、气候千差万别,而杉木生长也明显不同。杉木成熟林,中带树高可达20—25米,每亩年平均材积生长量0.5—1.0米~3;而南北及东西的边缘产区树高则只有10—13米,每亩年平均材积生长量0.2—0.6米~3。这样广大的、在环境上和生长上又有很大差别的栽培区域,必须进行适当的区划,以便了解不同区域的环境条件和杉木的生产潜力,确定合理的经营方向和栽培措施,才有可能在大规模发展杉木造林时,避免盲 First, the significance of the division of the growth of fir and its research profile Cunninghamia lanceolata is an important timber species in southern China, cultivation area is very wide, north and south across three subtropics, east-west coast from the hilly platform to the western Yunnan-Guizhou Plateau, topography, climate vary, and fir Growth is also significantly different. Cunninghamia lanceolata mature forest, the tree can be as high as 20-25 meters, the average annual volume of 0.5-1.0 meters per mu growth of 3; and North and East and the edge of the tree-growing area is only 10-13 meters, the average annual per mu The volume of growth of 0.2-0.6 m ~ 3. Such a broad range of cultivated areas, which differ greatly in their environment and growth, must be properly zoned so as to understand the environmental conditions in different regions and the productive potential of Chinese fir, and to determine the proper management direction and cultivation measures Avoid blindness when large-scale development of fir plantation