首页|Potential of Industrial Byproducts in Ameliorating Acidity and Aluminum Toxicity of Soils Under Tea Plantation

Potential of Industrial Byproducts in Ameliorating Acidity and Aluminum Toxicity of Soils Under Tea Plantation

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It is imperative to choose some low cost,available and effective ameliorants to correct soil acidity in southern China for sustainable agriculture.The present investigation dealt with the possible role of industrial byproducts,i.e.,coal fly ash(CFA),alkaline slag(AS),red mud(RM)and phosphogypsum(PG)in correcting acidity and aluminum(Al)toxicity of soils under tea plantation using an indoor incubation experiment.Results indicated that CFA,AS and RM increased soil pH,while PG decreased the pHs of an Ultisol and an Alfisol.The increment of soil pH followed the order of RM> AS > CFA.All the industrial byproducts invariably decreased exchangeable A1 and hence increased exchangeable Ca,Mg,K and Na and effective cation exchange capacity.RM,AS and lime decreased total soluble Al,exchangeable Al and organically bound Al.Formation and retention of hydroxyl-Al polymers were the principal mechanism through which Al phytotoxicity was alleviated by application of these amendments.In addition,the heavy metal contents in the four industrial byproducts constituted a limited environmental hazard in a short time at the rates normally used in agriculture.Therefore,the short-term use of the byproducts,especially AS and RM,as amendments for soil acidity and Al toxicity in acid soils may be a potential alternative to the traditional use of mined gypsum and lime.

acid soilalkaline slagameliorationcoal fly ashred mud

LI Jiu-Yu、WANG Ning、XU Ren-Kou、D.TIWARI

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State Key Laboratory of Soil and Sustainable Agriculture,Institute of Soil Science,Chinese Academy of Sciences,Nanjing 210008,China

Graduate University of the Chinese Academy of Sciences,Beijing 100049,China

Department of Chemistry,Mizoram University,Tanhril Campus,Aizawl 796009,India

Supported by the International Foundation of ScienceNational"Eleventh Five Years Plan"Key Project on Science and Technology of ChinaNational"Eleventh Five Years Plan"Key Project on Science and Technology of China

C/4073-12006BAD05B022009BADC6B02

2010

土壤圈(英文版)
中国土壤学会,中科院南京土壤研究所和土壤与农业可持续发展国家重点实验室

土壤圈(英文版)

CSTPCDCSCDSCI
影响因子：0.477
ISSN：1002-0160
年,卷(期)：2010.20(5)
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