【摘要】 本试验采用二次饱和Ｄ———最优设计，分析了皖麦１９氮素和密度７５００ｋｇ／ｈｍ２的产量效应，得出综合效应方程。结果表明：氮素的增产效应大于密度，二者互作是负效应。增施氮肥能明显增加公顷穗数和穗粒数，增加密度也能增加公顷穗数，但两者增加都会使千粒重下降。达到最高产量７９５４ｋｇ／ｈｍ２时的施氮量是２７０ｋｇ／ｈｍ２，密度是１７２万／ｈｍ２苗，这时最理想的产量结构是每公顷５４０．９万穗，每穗４４粒，千粒重３５．３克。更多还原

【Abstract】 This was analyzed from 1996 to 1997 by adoping Quadratic Saturation D-the optimum design.Effect of Nitrogen and density on 7500 kg/hm 2 of Wanmai No.19 was analyzed,Result shown that effect of increasing production of Nitrogen was over density, the ineraction was negative effect.Adding the amount of Nitrogen fertilizer applied could increase evidently the number of panicle per hm 2 and of grain per panicle.Adding density could increase the number of panicle per hm 2 too.But 1000 grain weight could drop because both two added.The measures for highest yield level of 7954kg/hm 2 were as following:N,270kg/hm 2 ;density,1.72×10 6 plant/hm 2.And idealest yield structure was:5.41×10 6 panicle/hm 2;44 grain/panicle;1000 grain weight,35.3g.更多还原