【摘要】 在江北农场二分场布置小麦"3414"肥料效应试验,研究了江汉平原地区氮、磷、钾肥对小麦产量和经济效应的影响。结果表明,合理施肥能改善作物的经济性状,增加每穗粒数、有效穗数、千粒重,降低基本苗数,提高小麦的产量和经济效益。小麦施用氮肥的效果最好,最高增产可达2326.5 kg/hm2,最高增收可达3767.9元/hm2;磷肥次之,最高增产可达976.5 kg/hm2,最高增收可达1667.7元/hm2;钾肥最小,最高增产可达955.5 kg/hm2,最高增收可达1575.5元/hm2。通过配置三元二次肥效模型,结合田间试验实际情况,确定小麦最高产量为4773.0 kg/hm2时的施肥量分别为189.0、67.5、64.5 kg/hm2,最佳经济产量为4725.0 kg/hm2时的施肥量分别为163.5、57.0、55.5 kg/hm2。更多还原

【Abstract】 A’3414’fertilizer experiment was carried out in Jiangbei farm’s second farm to study the effects of nitrogen,phosphorus and potassium fertilization in Jianghan plain on the yield and economic benefit of wheat.The result showed that the rational fertilization could improve the economic characters,enhance the plant’s grains per spike,effective panicles number and 1000-grain weight and decrease basic seedlings,so as to increase the yield and economic benefits of wheat.The effect of N fertilization on wheat yield and economic benefit was the largest,the next was P,and K fertilization was the smallest.The highest increases of yield with N,P and K were 2326.5,976.5 and 955.5 kg/hm2,and their corresponding net income were 3767.9,1667.7 and 1575.5 yuan/hm2,respectively.According to the model of ternary quadratic equation fertilizer effect,the highest yield of wheat would reach 4773.0 kg/hm2 when N,P2O5 and K2O application amount were189.0,67.5 and 64.5 kg/hm2,the highest profit would reach 4725.0 kg/hm2 when N,P2O5 and K2O application amount were 163.5,57.0 and 55.5 kg/hm2,respectively.更多还原