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编辑同志: 在土壤疏松,含水适量的条件下,一般施用铵态氮肥后5—7天,就可以发挥效益。在这期间硝态氮的含量迅速增加、促进了植物生长,以后又逐渐下降,但可维持25—30天。铵态氮肥自有流失快,持续时间短的特点,在我们这里有些作物(小麦)一次把无机氮肥施足,等到收割,时间长达100天(3月20日—7月1日),这样做是否符合科学使用无机肥料的方法?请编辑同志给予答复。
Editor comrades: In the loose soil, water moderate amount of conditions, the general application of ammonium nitrogen fertilizer after 5-7 days, you can play an effective. In the meantime, the content of nitrate nitrogen increased rapidly, which promoted the growth of plants and then decreased gradually, but it could last 25-30 days. Ammonia nitrogen has its own rapid loss of fast, short duration of the characteristics of some of our crops here (wheat) enough to apply inorganic nitrogen fertilization, until the harvest, as long as 100 days (March 20 - July 1), so Is it in line with scientific methods of using inorganic fertilizers? Please edit comrades to answer.