Li Fangzhen, Xie Lu, Shu Xiaohan, Wen Xiujuan, Zhang Haibo, Xing Hai, Huang Lei, Xu Chuchu, Sun Yefang, Lv Jun
Shaoxing Academy of Agricultural Sciences, Shaoxing, China.
Key Laboratory of Soil Contamination Bioremediation of Zhejiang Province, School of Environmental & Resource Sciences, Zhejiang Agriculture and Forestry University, Hangzhou, China.
Int J Phytoremediation. 2025;27(9):1178-1187. doi: 10.1080/15226514.2025.2485304. Epub 2025 Apr 7.
This study aims to elucidate the effect of peel biochar application on cadmium-contaminated soil and pakchoi () growth. A pot experiment was designed involving four distinct biochar/soil ratio treatments: 0 (Control, CK), 1% (T1), 2.5% (T2), and 5% (T3). The results demonstrated that the incorporation of 5% effectively modulated the pH of acidic soil, substantially elevating soil organic matter, and available N, P, K content. Moreover, it augmented the activities of catalase, urease, and acid phosphatase in the soil, concurrently diminishing the Cd content. This treatment reduced the exchangeable and carbonate-bound Cd fractions by 45% while enhancing the iron-manganese oxide-bound, organic matter-bound, and residual Cd fractions by 26%, 29%, and 96%, respectively. Regarding the growth of pakchoi, the 5% biochar application significantly decreased the Cd content in the edible portion by 51%. It significantly enhanced the fresh weight per plant, soluble solids, soluble sugar, soluble protein, and vitamin C content of pakchoi. In conclusion, the application of peel biochar is a viable approach for improving the properties of Cd-contaminated soil, passivating Cd fractions, and enhancing the yield and quality of pakchoi. A biochar pyrolysis temperature of 500 °C and a biochar/soil ratio of 5% is recommended.
本研究旨在阐明施用果皮生物炭对镉污染土壤及小白菜（）生长的影响。设计了一项盆栽试验，包括四种不同的生物炭/土壤比例处理：0（对照，CK）、1%（T1）、2.5%（T2）和5%（T3）。结果表明，施用5%的生物炭能有效调节酸性土壤的pH值，显著提高土壤有机质以及有效氮、磷、钾含量。此外，它还增强了土壤中过氧化氢酶、脲酶和酸性磷酸酶的活性，同时降低了镉含量。该处理使可交换态和碳酸盐结合态镉组分减少了45%，而铁锰氧化物结合态、有机质结合态和残留态镉组分分别增加了26%、29%和96%。关于小白菜的生长，施用5%的生物炭使可食用部分的镉含量显著降低了51%。它显著提高了小白菜的单株鲜重、可溶性固形物、可溶性糖、可溶性蛋白和维生素C含量。总之，施用果皮生物炭是改善镉污染土壤性质、钝化镉组分以及提高小白菜产量和品质的可行方法。建议生物炭热解温度为500℃，生物炭/土壤比例为5%。
