土壤酶作为土壤生态系统的主要组成部分之一,在营养物质转化、肥力水平提高、污染物清除等方面发挥着重要作用。本文采用长期定位试验地土样,测定了三大水解酶活性,并构建了土壤酶总体活性指标。结果显示:土壤酶活性可明显反映培肥效果...土壤酶作为土壤生态系统的主要组成部分之一,在营养物质转化、肥力水平提高、污染物清除等方面发挥着重要作用。本文采用长期定位试验地土样,测定了三大水解酶活性,并构建了土壤酶总体活性指标。结果显示:土壤酶活性可明显反映培肥效果的优劣;土壤化学性质与酶活性间呈显著或极显著正相关,揭示出土壤脲酶、转化酶和碱性磷酸酶在一定程度上均可表征土壤肥力水平;构建的土壤总体酶活性指标(Et=sum Xi/X,from i=1 to n Total enzyme activity index)的优点是消除了不同土样酶活性的量纲及大小的影响,且无量纲的最终参数便于比较;计算获得的土壤总体酶活性参数,可更好表征土壤中总体酶活性和肥力水平高低,结果与主成分、聚类分析的相同。展开更多
This paper summarizes the recent advances in the enzyme bioremediation of the pesticides pollution on mechanism, influencing factors and applications. The pesticides pollution of soils has become one of the major envi...This paper summarizes the recent advances in the enzyme bioremediation of the pesticides pollution on mechanism, influencing factors and applications. The pesticides pollution of soils has become one of the major environmental problems. However, enzymes such as peroxidase, parathion and hydrolase, which play a remarkable role in the bioremediation of pesticides polluted soils, can degrade parent compounds into less or no toxic metabolites through hydrolysis, oxidization, coupling reactions and so on. This approach is one of the best bioremediations of polluted soils with high efficient degradation, low cost and safety, by which the intermediate products of pesticides are incorporated into humus during the humification process, so that soils can restore dynamic balances.展开更多
文摘土壤酶作为土壤生态系统的主要组成部分之一,在营养物质转化、肥力水平提高、污染物清除等方面发挥着重要作用。本文采用长期定位试验地土样,测定了三大水解酶活性,并构建了土壤酶总体活性指标。结果显示:土壤酶活性可明显反映培肥效果的优劣;土壤化学性质与酶活性间呈显著或极显著正相关,揭示出土壤脲酶、转化酶和碱性磷酸酶在一定程度上均可表征土壤肥力水平;构建的土壤总体酶活性指标(Et=sum Xi/X,from i=1 to n Total enzyme activity index)的优点是消除了不同土样酶活性的量纲及大小的影响,且无量纲的最终参数便于比较;计算获得的土壤总体酶活性参数,可更好表征土壤中总体酶活性和肥力水平高低,结果与主成分、聚类分析的相同。
文摘This paper summarizes the recent advances in the enzyme bioremediation of the pesticides pollution on mechanism, influencing factors and applications. The pesticides pollution of soils has become one of the major environmental problems. However, enzymes such as peroxidase, parathion and hydrolase, which play a remarkable role in the bioremediation of pesticides polluted soils, can degrade parent compounds into less or no toxic metabolites through hydrolysis, oxidization, coupling reactions and so on. This approach is one of the best bioremediations of polluted soils with high efficient degradation, low cost and safety, by which the intermediate products of pesticides are incorporated into humus during the humification process, so that soils can restore dynamic balances.
