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Chinese Agricultural Science Bulletin ›› 2023, Vol. 39 ›› Issue (7): 46-50.doi: 10.11924/j.issn.1000-6850.casb2022-0174

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Effect of CO2 Capture Agent on Mineral Element Content of Pomegranate Leaves

HE Lijuan1(), HONG Mingwei1, WU Xing’en1, ZHANG Hongchang2, REN Jing1, BAI Chunlan3, WANG Zhenghe4, YANG Rongping1(), ZHANG Hong1()   

  1. 1 College of Garden and Horticulture, Yunnan Agricultural University, Kunming 650201
    2 Agricultural Office of Agricultural Comprehensive Service Center, Taoyuan Town, Yongsheng, Yunnan 674200
    3 Lijiang Science and Technology Association, Lijiang, Yunnan 674199
    4 Yunnan Lijiang Soft Seed Pomegranate Industry Association, Lijiang, Yunnan 674199
  • Received:2022-03-15 Revised:2022-10-08 Online:2023-03-05 Published:2023-03-15

Abstract:

The effects of foliar application of different concentrations of CO2 capture agent on the changes of mineral elements in pomegranate leaves at different growth stages were studied, and the reasonable fertilization time and dosage were determined to provide a theoretical basis for precise fertilization and high quality and high yield production of pomegranate. ‘Tunisia’ soft-seed pomegranate in Yongsheng County of Yunnan Province was used as the material. On the basis of conventional fertilization, the changes of mineral elements in leaves during pomegranate growth under different concentrations of CO2 capture agent (1.3%, 1%, 0.7% and 0.5%) were studied. With the growth and development of pomegranate, the content of N, P, Ca and Zn in leaves showed an upward trend, and the content of K, Mg and Fe showed a downward trend. 1.3% treatment of foliar spraying inhibited the content of N and P in pomegranate leaves. 0.7% treatment had significant promotion effect on the content of N, P and K in pomegranate leaves, which increased by 22.3%, 47.6% and 121.9% respectively compared with those of the control (water spraying), and significantly increased Fe content of mature pomegranate leaves. The content of Ca and Zn in pomegranate leaves treated with 0.5% concentration of CO2 capture agent were significantly increased, and the highest was 19.72 and 144.54 g/kg respectively, increased by 5% and 1.05 times compared with those of the control. At the same time, 0.5% treatment promoted the content of P and K in pomegranate leaves during vegetative growth period. The content of mineral elements in pomegranate leaves can be regulated by spraying a certain concentration of CO2 capture agent on the leaves. Among them, 0.7% treatment of foliar spraying can significantly increase the content of N, P, K and Fe in pomegranate leaves. 0.5% treatment can increase the content of Ca, Zn, P and K. Appropriate fertilization schemes can be formulated according to the differences in mineral element content at different growth stages to meet the nutritional requirement of pomegranate growth and development, thereby improving the quality of pomegranate.

Key words: pomegranate, CO2 capture agent, growth period, mineral elements, leaf