The ability of coal combustion products (fly ash and bottom ash) to increase vegetative yields: independent source of nutrients and/or as Carriers of P after Loading
The feasibility of using coal ash (pulverized fuel ash, PFA) and bottom ash (BA) from power generation in Ontario, Canada as a carrier for P (BA only) and as independent sources of plant available macro and micro nutrients (both FA and BA) to enhance vegetative yields has been studied from 2002-present. The performance (potted tomato yield) of the PFA was tested with, or a gainst, compost, commercially available potting soil, and a local farm soil (Bryanston silt loam). PFA was mixed with compost and farm soil at various ratios to determine the effects of increasing ash content (0-30％, w/w) as well as at fixed proportions of ash with varying amounts of compost (5％-20％, w/w). End member trials of either ash or compost combined with soil at 5, 10 and 20％ (w/w) were included. At fixed ratios of compost mixed with both soil and ash, the number of fruits, and shoot and root mass decreased with increasing ash addition. Optimum 3-component mixtures had the composition (w/w) soil (75％-85％): compost (1％-20％): ash (5％). However, mixtures of compost and ash alone outperformed all of the 3-component mixtures, commercial potting soil, and potting soil+fertilizer. A subsequent study tested the ability of P-loaded ash to supply P to potted corn trials. P-loaded ash was mixed with unloaded ash and sand. P-loaded ash made up 0. 6％-6％ of the total ash addition, which was mixed (w/w) at ash (6％): sand (94％). Increasing proportions of P-loaded BA enhanced the root and shoot mass of corn (Zea mays) in all trials.
coal ash nutrient supply phosphorous vegetative yield
B. R. Hart M. A. Powell J. Shen D. B. Hayden
Surface Science Western, Univ. of Western Ontario, London, Canada Geocon Environmental Consulting, London, Ontario, Canada Lab. Of Lithospheric Tectonics & Exp., China Univ. of Geoscience, Beijing, China Dept. of Biology, Univ. of Western Ontario, London, Ontario, Canada
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
362-363
2007-07-15（万方平台首次上网日期，不代表论文的发表时间）