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建国以来,北方各省(区)、市的有关单位对干旱山地的造林技术问题,在试验和生产性研究的基础上,进行了广泛的探讨,积累了丰富的经验。使我们可以根据现阶段的技术、经济条件,选用切实可行的技术措施来提高造林成活率,加快绿化荒山的速度。一、我省干旱山地自然条件的特点我省地处中纬度大陆性季风气候区。内长城以北属温带半干旱气候区,大部分地区的年降水量在400毫米以上,年均蒸发量都
Since the founding of the People’s Republic of China, relevant units in various provinces (autonomous regions) and municipalities in the north have conducted extensive discussions on afforestation technology in the arid mountainous areas on the basis of experimental and productive research and have accumulated rich experience. So that we can use practical technical measures to improve the survival rate of afforestation and speed up the afforestation and barren hills according to the current technical and economic conditions. First, the characteristics of the natural conditions of arid mountainous areas in our province is located in the mid-latitude continental monsoon climate zone. North of the Great Wall is a temperate semi-arid climate zone, annual precipitation in most parts of more than 400 mm, the average annual evaporation