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大搞农田林网化是防御干热风的好方法。如山东菏泽县胡集大队和泰安县茅茨大队,由于大力营造农田防护林网,在干热风发生季节,林网内比无林空旷区的风速平均降低30～50％,相对湿度提高20～55％,温度降低0.6～1.4℃,改变了干热风的性质,在土质、肥水条件和管理措施基本相同情况下,林网内的小麦比无林空旷区平均增产31～39％。不仅如此,农田林网化还可缩短干热风危害时间。河南省修武县,从1960年到1974年共出现干热风130天,其中1970年实现林网化之前就达106天,平均每年9.6天;实现林网化之后共24天,平
Invasion of farmland network is a good way to defensive dry hot air. For example, the Huji Brigade in Heze County, Shandong Province and the Maozitai Brigade in Tai’an County have greatly reduced the wind speed in the dry-hot winds by 30-50% and the relative humidity by 20-55% due to the vigorous construction of farmland shelterbelts %, And the temperature was decreased by 0.6-1.4 ℃, changing the nature of hot and dry wind. Under the same conditions of soil and fertilizer and water management and management measures, the wheat in forest net increased 31-39% on average compared with the no-open area. Not only that, farmland network can also shorten the hot wind damage time. Xiuwu County, Henan Province, a total of 130 days of dry and hot winds occurred from 1960 to 1974, of which 106 days were reached before the forestation in 1970, an average of 9.6 days per year. After a total of 24 days of forestation and leveling