近年来,朝阳地区玉米施用的氮肥数量普遍偏高,有的社队每亩地的氮肥施用量近200斤,个别地块甚至高达250斤。据统计,全地区平均每生产1斤粮食消耗氮肥0.24斤。由于不重视有机肥,盲目地加大施氮量,结果土壤肥力不断下降,生产费用逐年上升,粮食成本越来越高,增产不增收,甚至出现一些高产穷队。 In recent years, the amount of nitrogen fertilizer applied to maize in Chaoyang area is generally high. Some communities use nearly 200 kg of nitrogen fertilizer per mu of land, even up to 250 kg in some plots. According to statistics, the average consumption of 1 kg of grain in the entire region consumes 0.24 kg of nitrogen fertilizer. Due to the neglect of organic fertilizers, the amount of nitrogen applied blindly increased. As a result, the soil fertility was declining, the cost of production increased year by year, the cost of grain was getting higher and higher, the yield was not increased, and some high-yielding and poor teams even appeared.