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对新疆杨农田防护林胁地影响的研究结果表明，农田防护林在保护大片农田的同时，还导致林带作物的胁地减产。新疆杨北偏西２０°的南北向林带，对西侧棉花产量的影响范围可达１Ｈ，影响明显范围为０．７５Ｈ，影响严重范围为０．５Ｈ以内。采用关联度分析结果表明，经断根处理与不断根的林带，光照强度是导致林带胁地的主导因子。
The research on the effect of the threatening land on the protective farmland of poplar farmland in Xinjiang shows that the farmland shelterbelt also reduces the threatening yield of the forestland plant while protecting a large area of farmland. The North-North-forested belt with a northward slope of 20 ° north of Yangbei in Xinjiang can have an impact range of up to 1H on the cotton yield on the west side with an obvious impact range of 0.75H and a severe impact range of 0.5H or less. The results of correlation analysis showed that the intensity of light intensity was the dominant factor leading to forest belt threatening by cutting roots and continuous roots.