Coal ash in crop production system: effect on heavy metal distribution, plant accumulation, microbial activity and crop response
Coal ash has potential in supplying nutrient elements for plant growth besides act as an ameliorant for balancing soil pH. Suitability of using coal ash individually or as mixture with organic wastes, paper factory sludge, sewage sludge, animal manure and also chemical fertilizer in growing field crop was assessed with major thrusts on nutrient supply, crop response, changes in microbial properties, heavy metal accumulation and distribution in soil and in plant and changes in physico-chemical properties of soil. Application of ash individually or its mixture at different doses and forms in rice-peanut cropping system has increased growth and yield with significant improvement in availability of essential elements and also the status of physical, chemical and biological properties of soil. Incorporation of coal ash at all levels did not show any appreciable accumulation of environmentally sensitive metal either in soil or in the plant and also there is no evidence of increase in the mobile form of heavy metals: hence, the coal ash may be used as an ameliorant or as a source of plant nutrients.
Coal ash crop yield heavy metal content organic waste
B. C. Ghosh D. Choudhuri D. K. Swain S. Tripathi
Agricultural and Food Engineering Department, Indian Institute of Technology, Kharagpur 721 302, Ind Department of Geology and Geophysics, Indian Institute of Technology, Kharagpur 721 302, India Agricultural and Food Engineering Department, Indian Institute of Technology, Kharagpur 721 302, Ind
国际会议
第九届痕量元素生物地球化学国际会议(9th International Conference on the Biogeochemistry of Trace Elements)
北京
英文
360-361
2007-07-15（万方平台首次上网日期，不代表论文的发表时间）