论文部分内容阅读
在大田试验条件下,以耐密品种郑单958为试验材料,在相同密度下研究常规种植、三比空、大垄双行和大垄双行疏密4种种植方式对春玉米产量形成及其冠层结构特征的影响。结果表明,田间种植方式的改变可以促进良好冠层结构的发育,影响玉米群体产量及其生长发育特征,具体表现主要在吐丝期之后。耐密品种以大垄双行疏密种植方式为宜,从吐丝期开始,叶面积指数增长最快,玉米叶片的光合性能最强,叶片功能期延长,积累最多干物质,产量为12 449.74 kg/hm2,比对照增加32.67%。大垄双行疏密种植方式对棕壤气候区可提高玉米单产,对玉米生产能力的提升具有十分重要的作用。
Under the field test conditions, the yield-tolerant variety Zhengdan 958 was used as the experimental material to study the effects of conventional planting, three-emptying, big-ridge double-row and double-row widening and density planting on the yield formation of spring maize Its canopy structure characteristics. The results showed that the changes of planting patterns in the field could promote the development of good canopy structure and affect the yield and growth characteristics of maize population, especially after silking stage. Density varieties with two rows of large ridge density planting method is appropriate, from the beginning of silking stage, leaf area index increased fastest, maize leaves the strongest photosynthetic performance, leaf functional period is prolonged, the accumulation of the most dry matter, the output was 12 449.74 kg / hm2, 32.67% more than the control. Large ridge double rows of density planting methods on the brown climate zone can improve corn yield, improve the productivity of maize has a very important role.