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Biochar Blended with Alkaline Mineral Can Better Inhibit Lead and Cadmium Uptake and Promote the Growth of Vegetables

文献类型： 外文期刊

作者： Huang, Lianxi 1 ; Chen, Weisheng 1 ; Wei, Lan 1 ; Li, Xiang 1 ; Huang, Yufen 1 ; Huang, Qing 1 ; Liu, Chuanping 2 ; Liu, Zhongzhen 1 ;

作者机构： 1.Guangdong Acad Agr Sci, Inst Agr Resources & Environm, Lab Plant Nutr & Fertilizer South Reg, Lab Nutrient Cycling & Farmland Conservat, Guangzhou 510640, Peoples R China

2.Guangdong Acad Sci, Inst Ecoenvironm & Soil Sci, Guangzhou 510650, Peoples R China

关键词： biochar; heavy metals; alkaline mineral; lead; cadmium; acidic soil

期刊名称：PLANTS-BASEL （ 影响因子：4.0； 五年影响因子：4.4 ）

ISSN： 2223-7747

年卷期： 2024 年 13 卷 14 期

页码：

收录情况： SCI

摘要： Three successive vegetable pot experiments were conducted to assess the effects on the long-term immobilization of heavy metals in soil and crop yield improvement after the addition of peanut shell biochar and an alkaline mineral to an acidic soil contaminated with lead and cadmium. Compared with the CK treatment, the change rates of biomass in the edible parts of the three types of vegetables treated with B0.3, B1, B3, B9, R0.2 and B1R0.2 were -15.43%similar to 123.30%, 35.10%similar to 269.09%, 40.77%similar to 929.31%, -26.08%similar to 711.99%, 44.14%similar to 1067.12% and 53.09%similar to 1139.06%, respectively. The cadmium contents in the edible parts of the three vegetables treated with these six additives reduced by 2.08%similar to 13.21%, 9.56%similar to 24.78%, 9.96%similar to 35.61%, 41.96%similar to 78.42%, -4.19%similar to 57.07% and 12.43%similar to 65.92%, respectively, while the lead contents in the edible parts reduced by -15.70%similar to 59.47%, 6.55%similar to 70.75%, 3.40%similar to 80.10%, 55.26%similar to 89.79%, 11.05%similar to 70.15% and 50.35%similar to 79.25%, respectively. Due to the increases in soil pH, soil cation-exchange capacity and soil organic carbon content, the accumulation of Cd and Pb in the vegetables was most notably reduced with a high dosage of 9% peanut shell biochar alone, followed by the addition of a low dosage of 1% peanut shell biochar blended with 0.2% alkaline mineral. Therefore, the addition of a low dosage of 1% peanut shell biochar blended with 0.2% alkaline mineral was the best additive in increasing the vegetable biomass, whereas the addition of 9% peanut shell biochar alone was the worst. Evidently, the addition of 0.2% alkaline mineral can significantly reduce the amount of peanut shell needed for passivating heavy metals in soil, while it also achieves the effect of increasing the vegetable yield.

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