种植方式对夏玉米生长及产量的影响

Effects of Cropping Patterns on the Plant Growth and Yield of Summer Maize

试验选用当地主栽夏玉米品种,比较分析不同种植方式对夏玉米生长及产量的影响。结果表明,在种植密度为6.75万株/hm2水平下,与常规等行距种植方式(CK)相比,三行靠、四行靠和五行靠种植方式穗位高均有不同程度降低,茎粗增加;穗位上第1叶和第2叶叶夹角显著减小;穗位下第1叶和第2叶叶夹角也有不同程度的减小,但差异不显著;穗位上第2叶、穗位下第2叶叶向值增加。五行靠种植方式穗位上第2叶、穗位下第1叶和第2叶叶夹角均最小,穗位上第1叶和第2叶、穗位下第1叶和第2叶叶向值均最大,且叶面积指数最高。各处理单位面积地上干物重均高于对照,但子粒产量增加不显著。

The effect of different cropping patterns on the growth and yield of summer maize were studied with a local popular cuhivar. The results showed that under the planting density with 6.75 ×10^4 plants/ha, compared with the conventional uniform row spacing pattern（CK）, the ear height decreased, stem diameter increased and the leaf angle of the 1st and 2rd leaf above the ear leaf were significantly reduced and the LOV of the 2nd leaf above and below of the ear leaf were increased under three-row strip, four-row strip and five-row strip treatments. Among all treatments the five-row strip showed highest leaf area index and least leaf angle of the 2nd leaf above the ear leaf and highest LOV the 1st and 2nd leaf above the ear leaf compared with CK, the dry matter weight of the three cropping patterns all increased significantly, while the kernel yield increased insignificantly.