Acta Agriculturae Zhejiangensis ›› 2024, Vol. 36 ›› Issue (12): 2696-2704.DOI: 10.3969/j.issn.1004-1524.20240116

• Horticultural Science • Previous Articles     Next Articles

Effect of foliar spraying of iron nanoparticles on the growth and quality of spinach

ZHANG Yaru(), XIE Jianming(), ZHANG Jing(), YANG Xuzhen, WU Zhiguo   

  1. College of Horticulture, Gansu Agricultural University, Lanzhou 730070, China
  • Received:2024-02-01 Online:2024-12-25 Published:2024-12-27

Abstract:

Using substrate cultivation, spinach variety Dabo 6 was used as the test material, and foliar spraying of nano-zero-valent iron (NZVI) at different concentrations (5, 50, 150, 300 and 450 mg·L-1) was applied to study the effects of NZVI on the growth, photosynthetic characteristics and quality of spinach. The results showed that different concentrations of NZVI treatments increased the biomass, photosynthesis and leaf soluble sugar and vitamin C content of spinach, and showed a tendency to increase and then decrease with the increase of iron nanoparticles concentration; The largest increase was with 150 mg·L-1. Compared with CK, its dry and fresh weight increased by 75.73% and 49.44%, net photosynthetic rate (Pn), stomatal conductance (Gs), and transpiration rate (Tr), increased by 48.39%, 52.34%, and 52.38%, respectively, root vigor increased by 80.21%, and the content of soluble sugar and vitamin C increased by 42.34% and 25.60%, respectively. Different concentrations of NZVI treatments were could effect the content of nitrate and oxalic acid to different degrees, with the 150 mg·L-1 NZVI treatment showing the greatest reduction of 64.56% and 56.86%, respectively.

Key words: nano-zero-valent iron (NZVI), spinach, growth physiology, quality

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