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合阳县地处渭北黄土高原东部,境内地形复杂,山、原、沟、滩俱有,原、沟相问,原面宽阔,沟深坡陡,海拔在342～1543.8米之间。属暖温带半干旱气候,具备着发展林业的条件。但据1980年林业区划调查,30年累计造林30.29万亩,而保存而积只有8.77万亩,保存率为28.9%。由于造林成活率不高,保存率很低,已成为影响绿化速度和群众造林积极性的严重问题。为了弄清影响旱原造林成活率的主要原因,找出提高早原造林成活率的技术措施,特在凋查总结我县林业生产实践经验的基础上,吸取外地成功经验,提出以下分析和建议,供同类地区对这一问题进行探讨时参考。一、影响造林成活率的主要因子影响造林成活率的因子很多,如自然因子(海拔、坡度、坡向、气温、降雨、土壤等)、
Heyang County is located in the eastern part of the Weibei Loess Plateau, the territory of the complex terrain, mountain, the original, ditch, beach have, original, ditch asked, the original broad, ditch deep steep slope, elevation 342 ~ 1543.8 meters. Is a warm temperate semi-arid climate, with the conditions for the development of forestry. However, according to the survey of forestry zoning in 1980, a total of 30.29 million mu of afforested land have been planted in 30 years, while only 87,700 mu of land has been preserved, with a preservation rate of 28.9%. Since the survival rate of afforestation is not high and the preservation rate is very low, it has become a serious problem that affects the afforestation speed and the afforestation enthusiasm of the masses. In order to find out the main factors that influence the survival rate of afforestation on dry land and find out the technical measures to improve the survival rate of early stage afforestation, especially on the basis of reviewing the practical experience of forestry production in our county, we draw on the successful experience in the field and propose the following analysis and suggestions , For similar regions to explore this issue for reference. First, the main factors affecting afforestation survival rate Afforestation survival rate of many factors, such as natural factors (altitude, slope, aspect, temperature, rainfall, soil, etc.)