论文部分内容阅读
三、改进施肥技术,提高化肥利用率1.水田改“大头肥”为分期施肥近年来,水田化肥用量不断增加,如果仍采用施“大头肥”的方法,不仅会造成倒伏,而且易产生病害。如果采用“施足底肥、适当控制分蘖肥和增施穗肥”的分期施肥法,就可以消除“大头肥”的弊病。据省农科院试验,分期施肥比“大头肥”增产8.7％。分期施肥要求底肥施量占全生育期施肥量的35～45％(全层施肥、结合铺肥),分蘖肥占25～35％,减数分裂期施穗肥占25～35％(根据长势也可增施粒肥)。水田不宜施用硝酸铵,以防硝化淋失和反硝化逸失。氯化铵和尿素混合施用,可抑制硝化,减少淋失。
Third, to improve fertilization technology, improve fertilizer utilization 1. Paddy field to change “big fat” for the application of fertilizer In recent years, the amount of paddy fertilizer continues to increase, if still using the “big fat” method, not only will cause lodging, and prone to disease . If the “application of sufficient base fertilizer, tillering and appropriate control of the panicle fertilizer” staged fertilization method, you can eliminate the “fat man” drawbacks. According to the provincial Academy of Agricultural Sciences test, staged fertilization than the “big fat” increase of 8.7%. Staged fertilization requires that the amount of base fertilizer is 35-45% (full-layer fertilization combined with fertilizer) at the whole growth stage, tillering fertilizer accounts for 25-35% and meiosis is 25-35% (according to the growth Granulation can also be applied fertilizer). Ammonium nitrate should not be applied to paddy fields to prevent loss of nitrification and loss of denitrification. Ammonium chloride and urea mixed to inhibit nitrification and reduce leaching.