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Journal of Agriculture ›› 2020, Vol. 10 ›› Issue (10): 12-18.doi: 10.11923/j.issn.2095-4050.cjas20190700130

Special Issue: 玉米

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Ear Characters of Summer Maize: Response to Planting Density

Liu Xingzhou(), Li Meng, Chen Ruiji, Fu Hua, Ma Guimei, Zhou Yanhu, Zhang Jian()   

  1. Suzhou Academy of Agriculture and Forestry Science, Suzhou 234000, Anhui, China
  • Received:2019-07-22 Revised:2019-09-30 Online:2020-10-20 Published:2020-11-18
  • Contact: Zhang Jian E-mail:lxz8610@163.com;zhangjian061213@aliyun.com

Abstract:

To explore the response of ear characters of summer maize to different densities and the effect on yield composition, reveal the coordination relationship between ear characters, and provide a scientific basis for the high-yield dense-planting of new summer maize varieties, different density treatments were set up with ‘Hongda 216’ and ‘Kenfeng 101’ as experimental materials. Through determining ear row number, grain number per row and 1000-grain weight, the response of ear characters to planting density of summer maize was studied. The results showed that under different planting densities, the yield of each variety increased first and then decreased with the density, which was in line with the quadratic curve relationship. Correlation analysis showed that row number and ear length were extremely and significantly correlated with the yield, and the bald tip length was significantly correlated with the yield. The compact maize variety ‘Hongda 216’ had a very significant correlation between the ear row number and the yield, while the semi-compact maize variety ‘Kenfeng 101’ had a very significant correlation between the 1000-grain weight and the yield. Under the condition of rational close planting, it is easier to achieve high yield by coordinating the relationship between ear length, ear rows, row grains, and 1000-grain weight through fertilizer and water measures.

Key words: Summer Maize, Yield, Ear Characters, Planting Density

CLC Number: