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一、树种选择(一)选择树种的原则1、首先选用经济价值高的乡土树种。2、引种要选择抗逆性强,经济价值高,与当地生态条件相近的树种或品种。但引来后必须经过当地的试验、试种,确认成功后,才能大面积推广应用。3、对于水土保持林要求根系发达、树冠浓密、生长迅速、耐旱、耐瘠薄等。在土层较薄、气候干旱的宜林地,以营造灌木林
First, the choice of tree species (a) the principle of selecting species 1, first of all, the selection of native species of high economic value. 2, Introduction to choose strong resistance, high economic value, and the local ecological conditions similar species or species. However, after being introduced, it is necessary to go through local tests, test species, and confirm the success so that it can be widely applied and popularized. 3, for the soil and water conservation forest developed root system, dense canopy, rapid growth, drought, barren and so on. In the thinner soil, the arid climate, to create shrubbery