玉米高产高效低耗技术措施研究

Studies on the Cultural Practices of High Yield, High Efficiency and Low Cost of Maize

建立了灌区夏玉米高产、高效数学模型 ,并对模型进行了多目标解析 ,确定了农艺措施对产量的主效应和互作效应大小 ,筛选出关中灌区夏玉米采用紧凑大穗型玉米杂交种陕单 91 1高产、高效模式 [(82 5 0 (kg/hm2 )≤ y(产量 )≤ 975 0 (kg/hm2 ) ,yc(纯收入 )≥ 60 0 0元 /hm2 ) ]为 :密度 5 2 5 0 0株 /hm2 ,纯氮 2 5 6.5～ 3 1 0 .5kg/hm2 ,纯磷 1 1 7～ 1 5 0 kg/hm2。

Mathematical model of high yield and high efficiency of summer maize in irragating lands was established in this paper. Through analysis in mutiple rerpects, the main effects and the interactive effects of different agronomic measures on yield are achieved. The cultivating model of high yield and high efficiency (8250≤ y (yield, kg/hm 2)≤9750; Yc (net income, /hm 2)≥6000) cultivar shaandan 911, with crowed and big ear was selected. In this model, the density was 52 500 plants per hm 2, the ammount of nitrogen application was 256.5～310.5 kg per hm 2, the amount of phosphate is 117～150 kilogram per hm 2.