Journal of Zhejiang Agricultural Sciences ›› 2026, Vol. 67 ›› Issue (4): 846-851.DOI: 10.16178/j.issn.0528-9017.20240497

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Effects of wide and narrow row planting and exogenous brassinolide on agronomic traits and yield of fresh maize under high temperature in Zhejiang Province

CHENG Yixin1(), YUAN Meng1, LI Linhe1, ZHAO Fucheng2(), WANG Yang1(), ZHAO Guangwu1, HE Junguang3   

  1. 1.College of Advanced Agricultural Science,The Key Laboratory of Quality Improvement of Agricultural Products of Zhejiang Province,Zhejiang A&F University,Hangzhou 311300,Zhejiang
    2.Institute of Maize and Upland Crops,Zhejiang Academy of Agricultural Sciences,Dongyang 322100,Zhejiang
    3.Zhejiang Xin'an Chemical Group Co. ,Ltd. ,Hangzhou 311600,Zhejiang
  • Received:2024-06-19 Online:2026-04-11 Published:2026-04-17
  • Contact: ZHAO Fucheng,WANG Yang

Abstract:

To meet the annual demand for fresh maize in the Yangtze River Delta region,this study selected leading maize varieties Zhenuoyu 16 and Zhetian 11 in Zhejiang Province as materials,and studied the effects of wide and narrow row planting and spraying brassinolide during the silking stage on the agronomic traits and yield of fresh maize under high temperature conditions in summer at two stages under different soil fertility conditions. The results showed that compared with planting at equal row spacing(row spacing of 70 cm),planting in wide and narrow rows(wide row spacing of 70 cm and narrow row spacing of 50 cm)increased the ear diameter,single ear weight,and yield of the two varieties at the second stage. Compared with spraying water,exogenous application of 0.05 g·L-1 brassinolide during the silking stage increased the ear length,single ear weight,and yield of Zhenuoyu 16,as well as the yield of Zhetian 11. At the same time,it increased the contents of crude starch,amylose,and amylopectin in the seeds of the two varieties at the second stage. This study suggests that both wide and narrow row planting and spraying brassinolide during the silking stage can effectively alleviate the impact of high temperature on the yield of fresh maize,and are effective technical means for summer cultivation of fresh maize in Zhejiang Province.

Key words: fresh maize, high temperature in summer, wide and narrow rows, brassinolide, cultivation technique

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