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研究了安徽省沿淮、淮北水稻生产的主要因子（施氮量、栽插密度）对产量、纹枯病和褐飞虱发生程度的影响，结果表明：在试验范围内（施Ｎ：纯Ｎ７５～２７０ｋｇ／ｈｍ２，密度：常规稻１５～３７．５万穴／ｈｍ２，杂交稻１０．５～２８．５万穴／ｈｍ２），密度对产量的影响大于氮量；氮肥对纹枯病、褐飞虱发生程度的影响大于密度。根据试验结果综合分析认为，沿淮、淮北稻区，合理的氮肥、密度组配为：常规稻纯Ｎ１９２ｋｇ／ｈｍ２，密度２８．５万穴／ｈｍ２，杂交稻纯Ｎ１９２ｋｇ／ｈｍ２，密度２１．３万穴／ｈｍ２左右为宜，抗病品种的施Ｎ量可适当增加。
The effects of main factors (nitrogen and transplanted density) on the yield, sheath blight and the occurrence of brown planthopper in rice along the Huaihe and Huaibei provinces in Anhui Province were studied. The results showed that within the range of the experiment (applying N: pure N75 ~ 270kg / Hm2, density: 15-355,000 / hm2 for conventional rice and 10.5-2.55,000 / hm2 for hybrid rice), and the effect of density on yield was greater than that of nitrogen. The effect of nitrogen fertilizer on sheath blight, the occurrence of brown planthopper The impact is greater than the density. According to the comprehensive analysis of the test results, it is considered that the N125 × hm2, N192kg / hm2, N192kg / hm2, the density of 21.3 Ten thousand holes / hm2 is appropriate, resistant varieties of N application may be appropriate to increase.