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我国北方气候干燥,降水量低且分布不均,蒸发量大。石质低山阳坡土壤干旱、贫瘠、土层薄、石砾多,造林比较困难,尤其是不易确定造林树种,因为一旦树种选择不当,不仅造林成活率受到影响,而且人工林长期生长不良,造成种苗、人力和时间的大量浪费,土地生产潜力得不到充分发挥。因此,在北方石质低山阳坡造林中,贯彻适地适树的原则,选择适宜的造林树种,对提高造林质量,加快绿化步伐有重要意义。
The climate in northern China is dry with low precipitation and uneven distribution and large evaporation. Stony low mountain slope soil arid, barren, thin soil, more gravel, afforestation is more difficult, especially difficult to determine afforestation species, because once the tree species are not properly selected, not only afforestation survival rate is affected, and long-term growth of poor plantation, Resulting in a great waste of seedlings, manpower and time, and the potential of land production can not be fully realized. Therefore, in the afforestation of stony hillsides in the north, it is of great significance to implement the principle of adaptively adapting to the tree and selecting suitable afforestation species to improve the afforestation quality and accelerate the afforestation process.