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

作　　者：Assa Albert Houssou Paramsothy Jeyakumar Nabeel Khan Niazi Lukas Van Zwieten Xiang Li Lianxi Huang Lan Wei Xiaodong Zheng Qing Huang Yufen Huang Xianzhi Huang Hailong Wang Zhongzhen Liu Zhenrui Huang 

机构地区：[1]Key Laboratory of Plant Nutrition and Fertilizer in South Region,Ministry of Agriculture,Guangdong Key Laboratory of Nutrient Cycling and Farmland Conservation,Institute of Agricultural Resources and Environment,Guangdong Academy of Agricultural Sciences,Guangzhou 510640,China [2]Environmental Sciences,School of Agriculture and Environment,Massey University,Private Bag 11222,Palmerston North 4442,New Zealand [3]Institute of Soil and Environmental Sciences,University of Agriculture Faisalabad,Faisalabad 38040,Pakistan [4]Wollongbar Primary Industries Institute,NSW Department of Primary Industries,Wollongbar,Australia [5]State Key Laboratory of Silkworm Genome Biology,Chongqing 400715,China [6]Guangdong Provincial Engineering&Technology Research Center for Tobacco Breeding and Comprehensive Utilization,Crops Research Institute,Guangdong Academy of Agricultural Sciences,Guangzhou 510640,China [7]Biochar Engineering Technology Research Center of Guangdong Province,School of Environmental and Chemical Engineering,Foshan University,Foshan 528000,China [8]Key Laboratory of Soil Contamination Bioremediation of Zhejiang Province,Zhejiang A&F University,Hangzhou 311300,China

出　　处：《Biochar》2022年第1期1102-1116,共15页生物炭（英文）

基　　金：The financial supports from Special fund for Agricultural competitive industry discipline team building project of Guangdong Academy of Agricultural Sciences(202120TD);Guangdong Academy of Agricultural Sciences Dean Fund,China(BZ201903,BZ202001);Natural Science Foundation of China(41571313,21876027);Department of Science and Technology of Guangdong Province,China(2019B121201003);The National Project for Agricultural Technology System(CARS-18);Guangdong Provincial Special Fund For Modern Agriculture Industry Technology Innovation Teams(2019KJ109,2019KJ148)are gratefully acknowledged.

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℃of pyrolysis temperature.The contaminated soils were collected from Yunfu(clas-sified 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℃)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.

关 键 词：CONTAMINANT FEEDSTOCK Available P Soil pH heavy metal 

分 类 号：S15[农业科学—土壤学]