一要注意选择树种.造林能否成林成材,选择树种非常重要,只有按适地适树的原则进行,才能达到造林目的.如在荒山上营造薪炭林,就应选择沙棘和刺槐等;在河边营造护岸林,就应栽植杨树和柳树等;在平肥地上栽植速生丰产林,就应选择优良杨树品种和白榆等.二要注意合理的密度.一般的原则是,土质瘠薄的地方,应适当 First, we must pay attention to the choice of species. Afforestation can become a succession of trees, choice of species is very important, and only in accordance with the principle of appropriate tree planting in order to achieve the purpose of afforestation. If the barren hills to create fuelwood, should choose seabuckthorn and acacia; River bank protection should be planted poplar and willow trees; planted in the flat fat fast-growing high-yield forests should choose good poplar varieties and elm, etc. Second, pay attention to reasonable density. The general principle is that infertile soil place , Should be appropriate