Welcome to Chinese Agricultural Science Bulletin,

Chinese Agricultural Science Bulletin ›› 2022, Vol. 38 ›› Issue (23): 1-5.doi: 10.11924/j.issn.1000-6850.casb2021-1126

Special Issue: 生物技术 玉米

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Suitable Planting Density of New Maize Variety ‘Yudan 132’ for Mechanical Harvesting

LI Keke(), DONG Yongbin, WANG Lishuang, WANG Han, LI Yayong, ZHANG Long, LI Yuling()   

  1. College of Agriculture, Henan Agricultural University/ Maize Industry Integration Engineering Technology Research Center of Henan Province, Zhengzhou 450046
  • Received:2021-11-24 Revised:2022-01-26 Online:2022-08-15 Published:2022-08-08
  • Contact: LI Yuling E-mail:kkl1106@126.com;yuling_li@126.com

Abstract:

In order to screen suitable planting density of new maize variety ‘Yudan 132’ for mechanical harvesting, five planting densities, including 60000, 64500, 67500, 72000 and 75000 plants per hectare, were set in Changge and Yuanyang experimental bases, to study the effects of different planting densities on yield and agronomic traits. The results showed that with the increase of planting density, the plant height and ear height of ‘Yudan 132’ gradually increased, while the stalk diameter decreased. The ear tip-barrenness length increased with the increase of planting density, while ear length, ear diameter, kernel row number and kernel number per row showed a downward trend. With the increase of planting density, grain yield increased first and then decreased, and reached the maximum at 67500plants/hm2, showing an approximately parabolic distribution. Therefore, the suitable planting density of new maize variety ‘Yudan 132’ is 67500plants/hm2. This study will provide reference for the promotion and application of ‘Yudan 132’.

Key words: maize, ‘Yudan 132’, planting density, yield, agronomic traits

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