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关于护田林带的经济效果,已做了许多研究,有不少调查报告,都证实在各个自然经济区的不同耕作制度下,林带效果都很好,有的报告还提出了确定经济效果的方法。但是,这些调查报告对林带的有关参数都没有提出充分
Many studies have been done on the economic effects of the protection of the forest belt. Many survey reports confirm that the forest belt works well under different farming systems in various natural economic zones. Some reports also propose ways to determine the economic effect . However, none of these survey reports provided any relevant parameters for the belt