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由陕西省林科所主持、咸阳市林科所和永寿县林业局参加的“黄土高原防护林体系示范林研究”课题于1991年8月底在永寿县通过鉴定。来自国内的13名专家一致认为,该课题在黄土高原防护林体系建设方面,居国内同类研究的领先地位。课题组从调整农业生产结构,科学地配置林种、树种,优良乔灌草的选择引进,抗旱造林配套技术,水土保持效益观测,混交造林,病虫害综合防治等方面开展了综合研究。5年来共营造各类防护林19470亩,“四旁”植树105万株,造林成活率达90%以上,保存率84.7%,
The project of “Model Forest Research on Loess Plateau Shelterbelt” participated by Forestry Branch of Shaanxi Province and Forestry Bureau of Xianyang City and Forestry Bureau of Yongshou County passed the appraisal in Yongshou County at the end of August 1991. Thirteen experts from home and abroad all agreed that this project occupies the leading position of similar research in China in terms of the construction of the shelterbelt system on the Loess Plateau. The research group conducted a comprehensive study on adjusting agricultural production structure, scientifically allocating forest species and tree species, selecting and introducing excellent trees and shrubs, supporting technologies for drought-resistant afforestation, observing benefits of soil and water conservation, mixed afforestation and comprehensive prevention and control of pests and diseases. Over the past five years, a total of 19470 mu of shelterbelts have been set up, and 1.05 million trees have been planted on all sides, with the survival rate of afforestation reaching more than 90% and the preservation rate of 84.7%