Influence of Chromium Contamination on Carbon Mineralization and Enzymatic Activities in Vertisol

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• 作者：M. L. Dotaniya ; S. Rajendiran ; V. D. Meena ; J. K. Saha…
• 关键词：Alkaline phosphatase activity ; Chromium contamination ; Carbon mineralization ; Dehydrogenase activity ; Fluorescein diacetate activity
• 刊名：Agricultural Research
• 出版年：2017
• 出版时间：March 2017
• 年：2017
• 卷：6
• 期：1
• 页码：91-96
• 全文大小：
• 刊物主题：Cell Biology; Plant Ecology; Plant Genetics & Genomics; Plant Sciences; Biodiversity; Plant Biochemistry;
• 出版者：Springer India
• ISSN：2249-7218
• 卷排序：6

文摘

Chromium (Cr) contamination may affect different biochemical process in the soil. In a laboratory experiment, graded doses of hexavalent chromium were applied to a clay loam soil to investigate the impact on carbon (C) mineralization rate and the enzymatic activities at various time intervals. The maximum reduction in C mineralization was noticed at 100 mg/kg Cr at 45 days after incubation. Initially, the C mineralization rate was high but decreased at faster rate with lapse of time. It was observed that increasing the Cr concentration from 0 to 100 mg/kg resulted in reduction in dehydrogenase, alkaline phosphatase and fluorescein diacetate activities to the extent of 70, 63 and 41%, respectively. Among the enzymes, dehydrogenase activity was more sensitive to Cr toxicity. In conclusion, Cr toxicity negatively affected the microbial mediated C mineralization and enzymatic activities, which may adversely affect nutrient transformation in the soil and deterioration of soil health.