我省杨树栽培中一直存在着造林密度过大的倾向,农民偏爱密植,以为株数越多,收入越多,实际上经常事与愿违,造成减产和少收。密度是杨树人工林集约栽培的重要因素,密度一旦确定,在林分整个生长过程中都起作用,影响林木生长、采伐年龄、木材产量和木材规格。确定合理的密度时,应考虑到杨树的生物学特性和林木个体间的关系,保证林木群体能最大限度地利用空间,达到高产和希望培育的材种的径级,同时还要考虑所培育的材种的市场价格和经济效益。 Poplar cultivation in our province there is always the tendency of afforestation density is too large, farmers prefer dense planting, that the more plants, the more income, in fact often contrary to expectations, resulting in reduced production and less income. Density is an important factor for the intensive cultivation of poplar plantations. Once the density has been determined, it plays a role in the whole growth of the stands and affects the growth of trees, harvesting age, timber yield and timber specifications. When determining the reasonable density, we should take into account the biological characteristics of poplar and the relationship between forest individuals, to ensure that tree groups can maximize the use of space to achieve high yield and hope to cultivate the diameter of the species, but also consider the nurture Of the timber market price and economic benefits.