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在沙区营造用材林,通常多用一年生的壮苗实行植苗造林,成活率较高,生长也较好。杨、柳、白榆以及实生的柽柳苗,需要培育二年生苗木造林,而樟子松、油松等针叶树,一般宜用2～4年生苗造林。苗木本身质量的好坏,是决定造林成败的内在原因。选用壮苗造林成活率高,抗旱、抗病虫害
In the sand area to create timber forests, usually with more annuals of strong seedlings afforestation, higher survival rate, growth is better. Poplar, willow, white elm and the real tamarisk seedlings need to cultivate biennial seedlings afforestation, and coniferous pine, pine and other conifers, generally appropriate to 2-4 years of afforestation. Seedling itself quality is good or bad, is to determine the success or failure of afforestation inherent reason. Selection of strong seedling afforestation survival rate, drought, pests and diseases