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2001-2002年在江苏淮北稻区的东海(北纬34 5°)布置不同施氮量试验,以当地优质常规主栽粳稻品种早丰9号为研究对象,研究该地区施氮量对水稻综合生产力的影响。结果表明,在不施任何氮肥,稻谷产量6006kg·hm-2的基础地力上,施氮225～270kg·hm-2时,可获得最佳的综合生产力,即高产、优质、高效能得到协调统一。
In 2001-2002, different nitrogen rates were applied in the East China Sea (latitude 34 5 °) in Huaibei rice-growing area of Jiangsu Province. The main high-quality, conventional japonica rice variety Zaofeng 9 was selected to study the effects of nitrogen application rate on comprehensive rice productivity Impact. The results showed that under the condition of no fertilization of nitrogen fertilizer and 6006 kg · hm-2 of paddy soil fertility, the best comprehensive productivity could be obtained when nitrogen application rate was 225-270 kg · hm-2, that is, high yield, good quality and high efficiency could be harmonized .