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过去确定林带走向主要是以降低风速的大小做标准。因而强调“林带走向应与主害风相垂直”。通过我们实践体会,认为对这个结论应作具体分析。在我省的具体情况下,不应强求林带与主害风相垂直。其理由如下:一、我省大部分地区主害风向是西北风。按照“与主害风面垂直”的理论,林带的设置应为东北—西南走向。这样布局必然导致林木遮阴和农作物生长矛盾的突出。根据各
In the past to determine the direction of forest belts to reduce the size of the wind is mainly to do the standard. Thus emphasizing “the forest belt should be perpendicular to the main wind”. Through our practice, we think that this conclusion should be analyzed in detail. In the specific circumstances of our province, the forest belt should not be forced perpendicular to the main wind. The reasons are as follows: First, the main wind direction in most parts of our province is the northwest wind. According to the theory of “perpendicular to the dominant wind surface,” the setting of the forest belt should be northeast-southwest. This layout will inevitably lead to the contradiction between forest shade and crop growth. According to each