Journal of Zhejiang Agricultural Sciences ›› 2026, Vol. 67 ›› Issue (2): 326-331.DOI: 10.16178/j.issn.0528-9017.20240522

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Effect of polysuccinimide on summer maize⁃winter wheat rotation yield in the north China

JIN Nan1(), JIA Jianlin2, ZHANG Kuo3, LI Changming4, FAN Zhanquan3, LI Huashuai3, JIAO Yongkang3()   

  1. 1.Hulunbuir Jinxin Chemical Co.,Ltd.,Hailar 021599,Inner Mongolia
    2.Shijiazhuang Agricultural Technology Extension Center,Shijiazhuang 050051,Hebei
    3.Hebei Think?Do Chemistry Co.,Ltd.,Shijiazhuang 052165,Hebei
    4.Hebei Fangzhou Agricultural Technology Co.,Ltd.,Shijiazhuang 050035,Hebei
  • Received:2024-06-27 Online:2026-02-28 Published:2026-03-07

Abstract:

To investigate the effects of polysuccinimide (PSI) application rate on crop yield in the summer maize-winter wheat rotation system in north China,a field experiment was conducted over two consecutive years (four growing seasons) using summer maize (Zhengdan 958) and winter wheat (Jimai 38) as test materials. Different PSI application rates were set as treatments to systematically analyze their impacts on the yields of both crops. The results showed that PSI application in the first growing season significantly(p<0.05) increased the yields of both crops during the initial three consecutive seasons. PSI enhanced maize yield primarily by increasing kernel number per ear,and improved wheat yield by increasing the number of effective panicles. Under conventional fertilization,the effective duration of PSI was 22-23 months at application rates of 6.0-12.0 kg·hm-2,and extended to 24 months when the rate was increased to 18 kg·hm-2. Considering the stability of the fertilization effect,soil microbial activity,and other factors,it is recommended to apply PSI at 6.0-12.0 kg·hm-2 simultaneously with seeds during the summer maize sowing period each year.

Key words: polysuccinimide, application rate, summer maize-winter wheat rotation, north China

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