宁夏罗山国家级自然保护区人工林地现状调查及营造林技术

摘要

通过对2 000 hm2人工林地进行调查对比,结果表明,在相同条件下,乔木树种沙枣和榆树、灌木树种柠条和沙棘的造林成活率和保存率较高,但是柠条根系较深,对土壤水分养分消耗较高,对区域内生物多样性影响较大,且极易诱发病虫害。因此,利用柠条造林在面积数量上应适度控制,沙枣、榆树和沙棘应作为今后保护区造林首选树种。同时归纳总结了营造林技术。%A survey and comparison were made of the 2,000 hm2 of artificial forest.The result showed that the survival rates and retention rates of tree species elaeagnus angustifolia and elm and shrub species caragana korshinskii and sea buckthorn were relatively higher.Caragana root is deep and the consumption of soil moisture and nutrient is higher,the influence on regional biodiversity is large and plant diseases and insect pests could be induced easily.So the area and amount of caragana forest should be controlled to certain extent.The angustifolia,elm and sea buckthorn should be selected as the first choice of afforestation species in the nature reserve.A summarization was made on the afforestation technology.