夏玉米主栽品种合理密植技术研究

摘要

通过田间试验,研究了夏玉米主栽品种京单28和京玉11的合理密植技术.结果表明:与传统的等行距(60 cm)种植方式相比,采用大小行距(40、80cm)种植方式在高种植密度(7.5万株/hm2)条件下可以显著地增加玉米的产量.在相同种植方式下,随着种植密度的增加,两个品种的株高及稳位高均呈增高的趋势,但单株叶面积、单株干物重、穗粒数和千粒重均呈下降的趋势.%The rational high - density planting technique of mainly - cultivated two summer maize varieties (Jingdan 28 and Jingyu 11) was studied through the field tests. The results indicated that: in comparison with the conventional equal row - spacing (60 cm) planting mode, adopting the big - small row - spacing (40, 80 cm) planting mode could significantly increase the yield of maize under the condition of high planting density (75000 plants/hm2). Under the condition of the same planting mode, both the plant height and the ear - position height of two maize varieties showed a rising trend when the planting density increased, but the single -plant leaf area, single - plant dry matter weight, grains per ear and kilo - grain weight all revealed a decreasing trend.