论文部分内容阅读
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 experiment selected the local main summer maize varieties and compared the effects of different planting methods on the growth and yield of summer maize. The results showed that under the planting density of 67500 plants / hm2, the panicle height of three lines, four lines and five lines were all decreased to some extent compared with the conventional isometric planting pattern (CK) The angle between the first leaf and the second leaf was significantly reduced; the angle between the first leaf and the second leaf under the ear position also decreased to some extent, but the difference was not significant; the second leaf at the ear position , The second leaf value under the ear position increased. Five rows by planting ear position on the second leaf, ear position under the first leaf and the second leaf angle is smallest, ear position on the first and second leaves, ear position under the first and second leaves The largest value, and the highest leaf area index. The dry matter weight per unit area above the control was higher than that of the control, but the increase of grain yield was not significant.