Acta Agriculturae Zhejiangensis ›› 2025, Vol. 37 ›› Issue (12): 2574-2582.DOI: 10.3969/j.issn.1004-1524.20240958

• Environmental Science • Previous Articles     Next Articles

Effects of application rate of attapulgite-based conditioner on improvement of desertified soil and growth of Capsicum annuum var. conoides

LIU Yaya1(), WANG Qinli1,2,*(), XIE Jianming1, DENG Haoliang2, JIN Yongsheng3, XIONG Ying3, LIU Haina2   

  1. 1. College of Horticulture, Gansu Agricultural University, Lanzhou 730070, China
    2. Gansu Provincial Engineering Research Center for Resource Utilization of Edible Fungus Residue, Hexi University, Zhangye 734000, Gansu, China
    3. Linze County Fenjun Mining Co., Ltd., Linze 734200, Gansu, China
  • Received:2024-11-08 Online:2025-12-25 Published:2026-01-09
  • Contact: WANG Qinli

Abstract:

To explore the role of different application rates (CK, 0; T1, 1 800 kg·hm-2; T2, 2 400 kg·hm-2; T3, 3 000 kg·hm-2; T4, 3 600 kg·hm-2) of attapulgite-based conditioner on improvement of desertified soil and growth of pod pepper (Capsicum annuum var. conoides), and to determine the optimal application rate, a field experiment was conducted in the desertified soil in Linze County, Zhangye City, Gansu Province, China. It was shown that the proper rate of attapulgite-based conditioner could significantly (p<0.05) enhance the content of soil organic matter (OM), alkali-hydrolyzable nitrogen (AN), available phosphorus (AP) and available potassium (AK), decrease the soil bulk density and water-soluble salt content, increase the total porosity and mass fraction of water stable macroaggregates (particle size above 0.25 mm), and elevate the plant height, yield and vitamin C (VC) content of pod pepper. Based on the comprehensive evaluation of soil physiochemical properties and growth, quality and yield traits of pod pepper, T3 treatment showed the best performance. Under this application rate, the contents of soil OM, AN, AP, AK were significantly increased by 140.6%, 146.0%, 371.6%, 224.4%, respectively, and the total porosity of soil was significantly increased by 9.00 percentage points, the plant height, yield and VC content of pod pepper were significantly increased by 143.8%, 45.0%, 24.6%, respectively. In general, application of 3 000 kg·hm-2 attapulgite-based conditioner could both improve the fertility of desertified soil and the yield and qualtiy of pod pepper, showing promising application potential.

Key words: attapulgite-based conditioner, desertified soil, soil physiochemical property, Capsicum annuum var. conoides

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