【摘要】 采用均匀试验设计和逐步回归分析方法,以先玉335为试验材料,研究了水肥等栽培因子对玉米叶片完全展开时叶面积指数的影响。多因素分析表明,其影响顺序为:底氮>追氮>底磷>密度>补水>追肥/补水生育期>底钾>播期。在数学模型中,各栽培因子间耦合效应对玉米叶面积指数影响都达到了显著水平。在本试验研究范围内,当播期在5月11日,密度为80 999.8株/hm2,底施氮量为48.2 kg/hm2,底施磷量为293.6 kg/hm2,底施钾量为152.0 kg/hm2,追施氮量为62.8 kg/hm2,补灌量为1 199.4 m3/hm2,追肥/补水生育期在玉米18展叶时,叶面积指数理论最高值6.64。更多还原

【Abstract】 An experiment was conducted to study the effect of water,fertilizer and other cultivating factors on leaf area index of maize when the leaves spread by uniform experiment design and stepwise regression method using Xianyu335 as the experimental material.By Multiple Factors Analysis,the influence order is: base nitrogen>nitrogen topdressing>base phosphorus>planting density>supplementary irrigation>growth stages of supplementary fertilizer and irrigation>base potassium>sowing date.In the mathematical model,the coupling effect between cultivating factors on leaf area index of maize reaches the significant level.In the research bound of this experiment,the result is that the leaf area index of maize achieves the highest theoretical value 6.64 when the sowing date is May 11,the planting density is 80 999.8 strain/hm2,the base nitrogen is 48.2 kg/hm2,the base phosphorus is 293.6 kg/hm2,the base potassium is 152.0 kg/hm2,the nitrogen topdressing is 62.8 kg/hm2,the supplementary irrigation is 1199.4 m3/hm2,and the supplementary fertilization and irrigation is made in the growth stage when the eighteenth leaf of maize spreads completely.更多还原