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以紧凑型玉米品种浚单20为试验材料,通过拔节期不同的乙烯利喷施处理塑造不同的冠层结构,考察其对生长发育及产量性状的影响。结果表明:隔带(以2行为一带)喷施乙烯利的处理(间喷处理)可以形成凹形冠层,在高密度条件下,凹形冠层比全矮冠层(全层喷施乙烯利,全喷处理)及常规冠层(全层喷水处理,对照)表现出明显的增产效果,间喷处理增加了群体内边行优势并改善了群体下层受光状态。研究认为,通过人为措施(如隔带化控和高矮品种带状间作)塑造凹形群体结构是进一步提高玉米群体生产力的重要途径。
The compact maize variety Xundan 20 was used as the experimental material, and different canopy structures were formed by different ethephon spraying treatments at the jointing stage to investigate the effects on the growth and yield traits. The results showed that the ethephon could be formed into a canopy by the spraying of ethephon in two zones (with two rows in one zone). Under the condition of high density, the concave canopy was thicker than the full canopy And full canopy treatment (full-layer water treatment, control) showed a significant increase in yield. Inter-spraying increased the inner edge of the group and improved the lower layer of the light state. According to the research, it is an important way to further improve the productivity of maize population through artificial measures (such as zonal control and high variety variety).