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较为系统、全面地分析了林带（网）对小麦产量的影响。得出：１林带的胁地范围大致为１５Ｈ～２０Ｈ。如采用断根措施，其胁地范围可减少０５Ｈ左右。林网中２Ｈ～１８Ｈ范围为增产区，５Ｈ～１５Ｈ内为高增产区。２林带北侧和西侧林冠遮荫胁地影响较重，东侧、南侧较轻，且离林带愈近，其影响愈大。３开挖断根沟能有效地防止林带的根系胁地影响，使距林带１Ｈ范围内小麦减产幅度显著降低。４开挖断根沟的林网内，小麦平均增产７７％，无断根林网内平均增产４７％。
A more systematic and comprehensive analysis of the impact of the belt (web) on wheat yield. The conclusion is as follows: 1. The threatening range of forest belt is about 15H ~ 20H. Such as the use of cut-off measures, the threat range can be reduced by about 0 5H. Lin network 2H ~ 18H range for the increase yield area, 5H ~ 15H for high yield area. 2) The canopy shade threatening in the north and west canopy of the forest belt is heavier, with the lighter in the east and the south, and the closer it is to the forest belt, the greater its impact. 3) Excavating the ditch root canal can effectively prevent the root system of the forest belt from impact, so that the wheat yield within 1H range of forest belt significantly reduced. 4 Excavation of the ditch root canal network, the average yield of wheat increased by 77%, no root anomaly increase within the network 47%.