Welcome to Chinese Agricultural Science Bulletin,

Chinese Agricultural Science Bulletin ›› 2022, Vol. 38 ›› Issue (3): 81-86.doi: 10.11924/j.issn.1000-6850.casb2021-0218

Special Issue: 生物技术 土壤重金属污染 小麦 水稻

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Effect of Lime Application with Organic Materials on Soil Cadmium Form in Rice-wheat Rotation Fields

GAO Linlin1(), WANG Chensisi2, ZHANG Ning1, HU Hanxiu1, MA Youhua1()   

  1. 1School of Resources and Environment, Anhui Agricultural University, Hefei 230036
    2Xiuning County Agricultural Comprehensive Administrative Law Enforcement Team, Huangshan, Anhui 245400
  • Received:2021-03-04 Revised:2021-06-03 Online:2022-01-25 Published:2022-02-25
  • Contact: MA Youhua E-mail:1206077738@qq.com;yhma2020@qq.com

Abstract:

The study aims to explore the changes of cadmium form in heavily polluted farmland soil near the mining area of Tongling City after remediation with lime and organic materials under field experiment conditions, and provide a basis for the remediation of cadmium contaminated arable land. The soil cadmium morphological changes by applying bioorganic fertilizer, biochar and biofertilizer combined with lime in rice-wheat rotation field were studied respectively. The results showed that after the application of lime with organic materials, the soil pH range of wheat season was pH 4.72-5.39, while that of the rice season was pH 6.30-7.25. The available cadmium content in soil significantly decreased by 1.27%-14.71% and 17.72%-33.22%, respectively (P<0.05). The active forms of soil cadmium, such as acid-soluble state, converted to the residual state, realized the deactivation of cadmium. The passivation effect of lime with organic materials was better than that of lime alone, and the passivation effect of biological organic fertilizer with lime was the best in wheat season. By contrast, biological fertilizer with lime had the best passivation effect in rice season.

Key words: lime, organic materials, cadmium pollution, rice-wheat rotation, soil

CLC Number: