日本林学家建议采用团状造林法,植株栽种时可呈三角形、正方形、五角形、圆形或椭圆形;并且在每个团块地内植株之间的距离应尽可能缩小,以增强对风雪等不良影响的抵抗性,促使其加速形成森林环境,改善树干形质和提高人工林经济效益。在天然存在的或人工建立的团块地内,植株相互间的距离一般为0.4-0.7米,各个团块地之间的距离以3米或3米以上为宜,这样可以促进光合作用和最大限度的利用立地潜能。在每个团块地上针叶树种,以及槐、山毛榉、 Japanese forestry scientists recommend the use of group afforestation method, the plant can be planted triangular, square, pentagonal, round or oval; and the distance between the plants in each clump should be as narrow as possible to enhance the snow and other Adverse effects of resistance, prompting accelerated formation of the forest environment, improve trunk quality and improve the economic benefits of plantation. In naturally occurring or artificially established clumps, the distance between the plants is typically 0.4-0.7 m, and the distance between the individual clumps is preferably 3 or more meters, which promotes photosynthesis and maximizes The potential of using the site. In each clump of coniferous species, and Sophora japonica, beech,