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通过有机肥与无机肥对比定位试验,揭示氮肥肥效与硝态氮在土壤储存的一些规律。结果表明,有机氮肥能够实现作物高产,有机氮肥最高产量13092 kg hm-2、无机氮肥最高产量12773 kg hm-2。玉米作物产投比1.0时的最佳推荐施氮量有机氮为:252.72 kg hm-2、无机氮为:381.84 kg hm-2。施氮量在120～300 kg hm-2范围内,有机肥处理的土壤硝态氮储量高于无机氮处理。有机氮用量在80 kg hm-2以下,不会引起土壤硝态氮储量增加;无机氮用量在160 kg hm-2以下,不引起土壤硝态氮储量增加。
Through the comparative experiment of organic fertilizer and inorganic fertilizer, some rules of nitrogen fertilizer efficiency and nitrate nitrogen storage in soil were revealed. The results showed that organic nitrogen fertilizer could achieve high crop yield, the highest yield of organic nitrogen fertilizer was 13092 kg hm-2, and the highest yield of inorganic nitrogen fertilizer was 12773 kg hm-2. The best recommended N application rate for organic corn was 252.72 kg hm-2 and 381.84 kg hm-2 for inorganic corn. The amount of nitrogen application was in the range of 120-300 kg hm-2, and the storage of nitrate nitrogen in organic manure was higher than that of inorganic nitrogen treatment. The amount of organic nitrogen below 80 kg hm-2 will not cause the increase of soil nitrate nitrogen. The amount of inorganic nitrogen below 160 kg hm-2 will not cause the increase of soil nitrate nitrogen.