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Biochar and soil properties limit the phytoavailability of lead and cadmium by Brassica chinensis L. in contaminated soils

文献类型： 外文期刊

作者： Houssou, Assa Albert 1 ; Jeyakumar, Paramsothy 2 ; Niazi, Nabeel Khan 3 ; Van Zwieten, Lukas 4 ; Li, Xiang 1 ; Huang, Lianxi 1 ; Wei, Lan 1 ; Zheng, Xiaodong 1 ; Huang, Qing 1 ; Huang, Yufen 1 ; Huang, Xianzhi 5 ; Wang, Hailong 7 ; Liu, Zhongzhen 1 ; Huang, Zhenrui 6 ;

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

2.Massey Univ, Sch Agr & Environm, Environm Sci, Private Bag 11 222, Palmerston North 4442, New Zealand

3.Univ Agr Faisalabad, Inst Soil & Environm Sci, Faisalabad 38040, Pakistan

4.NSW Dept Primary Ind, Wollongbar Primary Ind Inst, Wollongbar, Australia

5.State Key Lab Silkworm Genome Biol, Chongqing 400715, Peoples R China

6.Guangdong Acad Agr Sci, Guangdong Prov Engn & Technol Res Ctr Tobacco Bre, Crops Res Inst, Guangzhou 510640, Peoples R China

7.Foshan Univ, Biochar Engn Technol Res Ctr Guangdong Prov, Sch Environm & Chem Engn, Foshan 528000, Peoples R China

8.Zhejiang A&F Univ, Key Lab Soil Contaminat Bioremediat Zhejiang Prov, Hangzhou 311300, Peoples R China

关键词： Contaminant; Feedstock; Available P; Soil pH; heavy metal

期刊名称：BIOCHAR （ 影响因子：11.452； 五年影响因子：11.452 ）

ISSN： 2524-7972

年卷期： 2022 年 4 卷 1 期

页码：

收录情况： SCI

摘要： The current study investigated the effect of biochars derived from cinnamomum woodchip, garden waste and mulberry woodchip on soil phytoavailable lead (Pb), cadmium (Cd) pools, and their uptake by Chinese cabbage (Brassica chinensis L.). The biochars were produced at 450 degrees C of pyrolysis temperature. The contaminated soils were collected from Yunfu (classified as Udept), Jiyuan (Ustalf) and Shaoguan (Udult) cities in China at the depth of 0-20 cm and amended with biochars at the rate of 3% w/w. After mixing the soil with biochar for 14 days, the Chinese cabbage was planted in the amended soils. Then, it was harvested on the 48th day after sowing period. In Udult soil, Chinese cabbage died 18 days after sowing period in control and soils amended with cinnamomum and mulberry biochars. Although only plants grown with the garden waste biochar treatment survived in Udult soil, amendment of garden waste or mulberry biochars at 3% w/w (450 degrees C) to Udult soil significantly increased (4.95-6.25) soil pH compared to other biochar treatments. In Udept and Ustalf soils, the application of garden waste and mulberry biochars significantly improved plant biomass compared to control, albeit it was dependent on both biochar and soil properties. Garden waste biochar significantly decreased soil Cd phytoavailable concentration by 26% in the Udult soil, while a decrease of soil Cd phytoavailable concentration by 16% and 9% was observed in Ustalf and Udept soils, respectively. The available phosphorus in biochar and soil pH were important factors controlling toxic metal phytouptake by the plant. Thus, the amendment of soil with biochar at 3% can effectively reduce the mobility of Cd and Pb in soil and plant uptake. However, biochar and soil properties should be well-known before being used for soil toxic metal immobilization.

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