SOIL MICROBIAL BIOMASS AND ENZYME ACTIVITIES RESPONSE TO COPPER AND MOLYBDENUM POLLUTION IN THE VICINITY OF ZANGEZUR COPPER AND MOLYBDENUM COMBINE, ARMENIA

K. Ghazaryan, H. Movsesyan
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Abstract

The aim of this study was to define a relationship between heavy metal (Cu, Mo) pollution of soil and various extracellular enzyme activities. Six enzymatic activities involved in cycles of carbon, nitrogen, phosphorus and sulfur (β-glucosidase, chitinase, leucine-aminopeptidase, acid phosphomonoesterase, alkaline phosphomonoesterase, and arylsulphatase) as well as microbial biomass were determined in soil samples collected in the surroundings of Zangezur Copper and Molybdenum Combine. The investigations showed that pollution of soil with copper and molybdenum led to a decrease in microbial biomass and soil enzymatic activity, which in turn had a negative impact on cycles of chemical elements, in particular C, P, N and S. This gives reason to conclude that the changes in soil microbial biomass and enzymatic activity may act as indicators of soil biological activity and quality.
亚美尼亚赞格祖尔铜钼联合厂附近土壤微生物生物量和酶活性对铜钼污染的响应
本研究的目的是确定土壤重金属(Cu, Mo)污染与各种胞外酶活性之间的关系。测定了藏则孜尔铜钼联合企业周围土壤样品中参与碳、氮、磷、硫循环的6种酶(β-葡萄糖苷酶、几丁质酶、亮氨酸-氨基肽酶、酸性磷单酯酶、碱性磷单酯酶和芳基硫酸盐酶)活性及微生物生物量。研究表明,铜、钼污染土壤导致土壤微生物量和土壤酶活性下降,进而对土壤中化学元素的循环,特别是C、P、N、s的循环产生负面影响。因此,土壤微生物量和酶活性的变化可能是土壤生物活性和质量的指标。
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