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Supplying amendments alleviates aluminum toxicity and regulates cadmium accumulation by spinach in strongly acidic soils

文献类型： 外文期刊

作者： Fan, Beibei 1 ; Ding, Shuai 1 ; Peng, Yutao 2 ; Yin, Junhui 1 ; Liu, Yanli 1 ; Cui, Shihao 1 ; Zhou, Xue 1 ; Mu, Kangguo 1 ; Ru, Shuhua 3 ; Chen, Qing 1 ;

作者机构： 1.China Agr Univ, Coll Resources & Environm Sci, Beijing Key Lab Farmland Soil Pollut Prevent & Rem, Beijing 100193, Peoples R China

2.Sun Yat sen Univ, Sch Agr, Shenzhen 523758, Guangdong, Peoples R China

3.Hebei Acad Agr & Forestry Sci, Inst Agr Resources & Environm, Shijiazhuang 050051, Hebei, Peoples R China

关键词： Soil amendments; Aluminum toxicity; Spinach; Regulation; Cadmium accumulation

期刊名称：JOURNAL OF ENVIRONMENTAL MANAGEMENT （ 影响因子：8.91； 五年影响因子：8.549 ）

ISSN： 0301-4797

年卷期： 2022 年 324 卷

页码：

收录情况： SCI

摘要： Al toxicity and Cd pollution are key limiting factors for agricultural production in the acidic soils in China. The application of amendments is an effective and promising measure for remediating strongly acidic Cdcontaminated soils. However, the information on applying amendments for alleviating Al toxicity and regulating plant Cd accumulation is still rare. Here, oyster shell (OS), red mud (RM), hydroxyapatite (HAP), and biochar (BC) at 30 g kg-1 were investigated for alleviating Al toxicity and decreasing Cd accumulation in spinach plants. The results showed that four amendments significantly increased soil pH, and reduced soil exchangeable Al3+ and DTPA-Cd, promoted spinach growth (P < 0.05). Al(OH)30 and Al-HA were the main forms of active Al in soil. The BC and OS were more effective to alleviate Al toxicity but significantly (P < 0.05) increased Cd accumulation in spinach. RM and HAP effectively reduced the uptake of Cd by spinach plants as well as alleviated Al toxicity (P < 0.05). Bivariate correlation analysis and the partial least squares path modeling analysis indicated that soil exchangeable Al3+ was the main limiting factor for biomass production. Our study demonstrated that HAP could significantly alleviate Al toxicity, promote spinach growth, and decrease Cd accumulation in strongly acidic Cd-contaminated soils. Besides, OS and BC effectively alleviated soil Al toxicity leading to promoting the growth of spinach. Compared with CK, RM treatment significantly reduced soil Cd bioavailability (61.2%) and decreased Cd concentration and uptake of spinach plants by 90.0% and 50.7%. These results indicated that RM could be used as an efficient amendment in Cd contaminated.

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