Cow manure and cow manure-derived biochar application as a soil amendment for reducing cadmium availability and accumulation by Brassica chinensis L. in acidic red soil

• Published in: Journal of Integrative Agriculture 2017-03, Vol.16 (3), p.725-734
• Main Authors: Kiran, Yasmin Khan, Barkat, Ali, CUI, Xiao-qiang, FENG, Ying, PAN, Feng-shan, TANG, Lin, YANG, Xiao-e
• Format: Article
• Language: English
• Subjects: biochar; Brassica; Brassica chinensis; cow manure; phytostabilization; red soil; trace metals; 土壤改良剂; 应用; 牛粪; 生物质炭; 酸性红壤; 镉积累; 镉（CD）
• ISSN: 2095-3119; 2352-3425
• DOI: 10.1016/S2095-3119(16)61488-0

Organic amendment is a promising,in situ phytostabilization approach to alleviate the phytotoxic effects of heavy metal contaminated soils.The aim of this study was to evaluate the feasibility of cow manure（CM）and its derived biochar（CMB）as a soil amendment on cadmium（Cd）availability and accumulation in low and high Cd-accumulating cultivars of Brassica chinensis L.grown in an acidic red soil.CM and CMB were applied to Cd-contaminated acidic red soil at the rates of 0,3.0and 6.0%（w/w）.Application of CMB was significantly more effective than that of CM,as it reduced the availability of Cd in soil by 34.3–69.9%and its bioaccumulation in the low Cd accumulator,Aijiaoheiye 333,by 51.2 and 67.4%,respectively.The addition of CMB significantly increased the extractability and accumulation of trace metals（Zn,Mn,Fe,and Cu）by plants and improved plant biomass production.CMB application,combined with utilizing low Cd accumulating cultivars represents a new,sustainable strategy to alleviate the toxic effects on Cd and improve food safety.