Bioaccumulation of nutrient elements from fly ash-amended soil in Jatropha curcas L.: a biofuel crop
Bioaccumulation of nutrient elements from fly ash-amended soil in Jatropha curcas L.: a biofuel crop
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DOI：
10.1007/s10661-013-3058-x
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发表时间：
2013-08-01
影响因子：
3
通讯作者：
Ghosh, Arup
中科院分区：
文献类型：
--
作者：
Chaudhary, Doongar R.;Ghosh, Arup
燃煤粉煤灰是一种潜在的无机土壤改良剂；对其养分释放和向土壤供应的认识可以提高其农业利用水平。本研究旨在评估粉煤灰（燃煤热电厂废弃物）减少土壤肥力耗竭的能力，并研究在粉煤灰改性土壤上生长的麻疯树矿质养分的生物积累。在麻瓜生长的田间土壤中，分别以0、5、10、20、40和70% w/w的比例添加粉煤灰。生长8个月后，添加5%和10% FA的土壤显著提高了麻疯树的株高，而添加5%、10%和20% FA的土壤生物量显著高于对照土壤（0% FA）。粉煤灰对土壤养分吸收影响最大的是叶片，其次是茎和根。大部分养分积累量在粉煤灰含量达到20%时增加，之后减少。土壤速效养分分析结果表明，在高水平的粉煤灰改进剂下，土壤氮、钾、硫、铜、铁、锰和锌的速效度显著下降，而磷的速效度增加。粉煤灰对土壤pH、有机碳和速效硼的影响不显著。在20%及以上的粉煤灰用量下，微生物生物量C、N和微生物碳与有机碳的比例显著降低。本研究表明，麻瓜植物可以通过后续的土壤改良，有效利用粉煤灰中的营养物质。
Fly ash (FA) from coal-burning industries may be a potential inorganic soil amendment; the insight of its nutrient release and supply to soil may enhance their agricultural use. The study was conducted to assess the ability of fly ash (a coal fired thermal plant waste) to reduce soil fertility depletion and to study bioaccumulation of mineral nutrients in Jatropha curcas grown on soils amended with fly ash. Fly ash was amended to field soil at six rates (0, 5, 10, 20, 40, and 70 % w/w) on which J. curcas was grown. After 8 months of growth, the height of jatropha plants was significantly increased at 5 and 10 % FA-amended soil, whereas, biomass significantly increased at 5, 10, and 20 % FA-amended soil compared to control soil (0 % FA). Leaf nutrients uptake, followed by stems and roots uptake were highly affected by fly ash amendment to soil. Most of nutrients accumulation were increased up to 20 % fly ash and decreased thereafter. The results of available nutrient analysis of soil revealed that availability of nitrogen, potassium, sulfur, copper, iron, mangnese, and zinc declined significantly at higher levels of fly ash amendments, whereas, availability of phosphorus increased at these levels. However, pH, organic carbon, and available boron were not influenced significantly by fly ash amendment to soil. Microbial biomass C, N, and ratio of microbial-C to organic C were significantly reduced at 20 % fly ash and higher amounts. This study revealed that J. curcas plants could gainfully utilize the nutrients available in fly ash by subsequently amending soil.