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植树造林,特别是大面积营造护田林网,是创造适宜于农作物生长的气候环境条件,防御干热风,保障农业高产稳产的一项重要措施.为了阐明农田林网在农业生产中的重要作用,我们于1979年5月中旬到6月中旬在丰县宋楼公社渠坑大队进行了观测.我们采用半定位观测方法,在观测林带背风面5、10、15、20和25倍树高处设置观测点,并在林网外边无林网保护的麦田中设置对照点,进行了风速、气温、空气湿度和蒸发量的观测.观测林网网格面积96亩(南北宽304米,东西长210米).主要观测林带为东西走向,带宽12米(为小沟和渠路林结合类
Afforestation, especially large-scale afforestation, is an important measure to create suitable climatic and environmental conditions for crop growth, prevent dry and hot wind, and ensure high and stable agricultural production.In order to clarify the important role of farmland network in agricultural production, In mid-May 1979 to mid-June 1979, we conducted a series of observations at the Weicheng Brigade, Songlou commune, Fengxian County.We used the semi-location observation method to observe at 5, 10, 15, 20 and 25 times the height of the forest leeward Point and set control points in the wheat field without forest net protection outside the forest net, and observed the wind speed, air temperature, air humidity and evaporation.The observation forest net area is 96 mu (304 meters from north to south and 210 meters from east to west ) The main observation forest belt is east-west with a width of 12 meters (a combination of small ditches and canal groves