夏玉米主栽品种合理密植技术研究

Study on Rational High-density Planting Technique of Mainly-cultivated Summer Maize Varieties

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、80㎝)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,两个品种的株高及穗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.