Acta Agriculturae Zhejiangensis ›› 2022, Vol. 34 ›› Issue (7): 1493-1501.DOI: 10.3969/j.issn.1004-1524.2022.07.17

• Environmental Science • Previous Articles     Next Articles

Effects of soil conditioners on Cd translocation and accumulation and yield of rice in central Guizhou Province, China

LOU Fei1(), FU Tianling2, DAI Liangyu3, ZHOU Kai4, LIN Dasong5, HE Tengbing1,2,*()   

  1. 1. College of Agriculture, Guizhou University, Guiyang 550025, China
    2. Institute of New Rural Development, Guizhou University, Guiyang 550025, China
    3. Agricultural Ecology and Resource Protection Station of Guizhou Province, Guiyang 550001, China
    4. Bureau of Agriculture and Rural Affairs of Kaiyang County, Kaiyang 550300, Guizhou, China
    5. Agro-Environmental Protection Institute, Ministry of Agriculture and Rural Affairs, Tianjin 300191, China
  • Received:2021-02-19 Online:2022-07-25 Published:2022-07-26
  • Contact: HE Tengbing

Abstract:

A plot experiment was carried out to assess the applicability of soil conditioners on Cd-polluted acid paddy fields in central Guizhou Province, China. The effects of soil conditioners on soil pH, contents of total Cd and available Cd, Cd contents in different parts of rice and rice yield were analyzed. It was shown that application of lime or 11 conditioners significantly (P<0.05) increased soil pH by 0.25-1.02 unit compared with the control (CK), and significantly (P<0.05) reduced soil available Cd content by 8.90%-22.14%. Application of 11 soil conditioners could decrease Cd content and Cd enrichment coefficient in different parts of rice, as Cd content in brown rice was significantly (P<0.05) decreased by 19.09%-82.45%, and the Cd enrichment coefficient in root, stem, leaf and brown rice was significantly (P<0.05) decreased by 16.62%-69.90%, 18.40%-94.18%, 25.82%-78.02%, 18.02%-85.46%, respectively. In addition, application of lime and 11 soil conditioners could significantly (P<0.05) inhibit the translocation of Cd from leaf to rachis, and from rice husk to brown rice. The economic cost of application of soil conditioners was higher than that of lime. Among the 11 soil conditioners, Tebeigai showed the lowest application cost of 7 200 yuan·hm-2. Given the Cd reduction effect and economic cost, the soil conditioner Tebeigai was the best choice under experiment conditions, and could be recommended for further application in central Guizhou.

Key words: soil conditioner, rice, cadmium enrichment and translocation, economic cost

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