Row Spacing Allocation: Effect on Stem Lodging Resistance and Photosynthetic Properties of Maize

doi:10.11924/j.issn.1000-6850.casb17040091

Abstract

Abstract: To explore the effect of different row spacings on stem lodging resistance and photosynthetic properties of maize, figure out the optimum row spacing of spring maize in Shanxi province, field experiment was carried out in 2015 in DongYang test base of Shanxi province agricultural science court. ‘Dafeng 30’ was used as material, four row spacings, the wide row spacing(80 cm), the narrow row spacing(40 cm), the wide-narrow row spacing (80 40cm), and the equal row spacing(60 cm) were set and the responses of stem lodging resistance, LAI, photosynthesis parameter and yield to different row spacings were analysed. The results showed that the wide row spacing(80 cm) and the wide-narrow row spacing (80 40cm) decreased the plant height, ear height and ear height coefficient, increased different internodes stalks hardback rind penetration strength and stem bending capacity at male stage and filling stage, and increased LAI, leaf photosynthesis rate and transpiration rate, and increased ear length, ear row number, numbers of rows and hundred kernel weight compared with the narrow row spacing(40 cm) and the equal row spacing(60 cm). And the yield was increased 17% and 9% respectively under the wide-narrow row spacing (80 40 cm) and the wide row spacing(80 cm) compared with the narrow row spacing(40 cm) and the equal row spacing(60 cm), especially the wide-narrow row spacing (80 40 cm). In addition, the yield was significantly correlated with LAI, leaf photosynthesis rate and transpiration rate from male stage to mature. Therefore, the wide-narrow row spacing (80 40 cm) was beneficial to increase stem lodging resistance capacity, improve photosynthesis, optimize components of maize yield, increase the yield and can provide basis of technology for maize planting in Shanxi province.

CLC Number:

S512.1

Deng Yan,Wang Chuangyun,Zhao Li,Zhang Liguang,Guo Hongxia,Niu Xueqian and Wang Lujun. Row Spacing Allocation: Effect on Stem Lodging Resistance and Photosynthetic Properties of Maize[J]. Chinese Agricultural Science Bulletin, 2017, 33(21): 15-20.

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