CAJ | 학술논문

土壤微生物对土壤重金属污染反应敏感,是探讨矿区土壤重金属污染牛态效应的有效指标之一.通过野外调查与采样和室内分析,研究了藏中矿区重金属污染对土壤蔗糖酶、脲酶、脱氢酶和酸性磷酸酶活性、微生物生物量C(MBC)、N(MBN)和P(MBP)、土壤基础呼吸、代谢商(qCO2)及可矿化N的影响.研究表明,矿区土壤重金属Cu、Zn、Pb、Cd全量和有效含量均高于对照土壤;随着矿区土壤重金属含量增加,土壤酶活性、微生物量C、N和P、可矿化N均逐渐降低,土壤基础呼吸和qCO2则逐渐升高;土壤重金属与土壤蔗糖酶活性、脲酶活性、脱氢酶活性、酸件磷酸酶活性、MBC、MBN、土壤基础呼吸、qCO2及可矿化N具有显著的线性相关;脱氢酶活性对土壤重金属污染最为敏感,表明脱氢酶活性可作为藏中矿区土壤环境质量变化的有效指标.
토양미생물대토양중금속오염반응민감,시탐토광구토양중금속오염우태효응적유효지표지일.통과야외조사여채양화실내분석,연구료장중광구중금속오염대토양자당매、뇨매、탈경매화산성린산매활성、미생물생물량C(MBC)、N(MBN)화P(MBP)、토양기출호흡、대사상(qCO2)급가광화N적영향.연구표명,광구토양중금속Cu、Zn、Pb、Cd전량화유효함량균고우대조토양;수착광구토양중금속함량증가,토양매활성、미생물량C、N화P、가광화N균축점강저,토양기출호흡화qCO2칙축점승고;토양중금속여토양자당매활성、뇨매활성、탈경매활성、산건린산매활성、MBC、MBN、토양기출호흡、qCO2급가광화N구유현저적선성상관;탈경매활성대토양중금속오염최위민감,표명탈경매활성가작위장중광구토양배경질량변화적유효지표.
Soil microbial activity plays a crucial role in soil biochemistry processes,which can be used as a useful indicator to discuss ecological effects of heavy metal pollution.Field investigation and sampling analysis of polluted mining soil were conducted to discuss effects of heavy metal pollution on soil enzyme activity,microbial biornass C,N and P,basal respiration,metabolic quotients(qCO2),and potential mineral N in Lawu mine,central Tibet.The results showed that total and available contents of heavy metals were significantly higher in mining soils than in CK.Soil enzyme activities,microbial biomass C,N and P,potential mineral N decreased with increasing contents of heavy metals,but basal respiration and qCO2 increased with increasing contents of heavy metals.There were significant and linear correlations between soil heavy metal contents with enzyme activity,microbial biomass,basal respiration,qCO2,and potential mineral N.Dehydrogenase activity was the most sensitive to reflect changes in soil environmental quality affected by heavy metals,indicating that dehydrogenase activity might be a useful indicator for assessing change in soil environmental quality in metal mine of central Tibet.