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首页> 外文期刊>Journal of Residuals Science & Technology >Effects of Long Term Irrigation with Polluted Water and Sludge Amendment on Some Soil Enzyme Activities
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Effects of Long Term Irrigation with Polluted Water and Sludge Amendment on Some Soil Enzyme Activities

机译：污水长期灌溉和污泥改良对土壤酶活性的影响

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The objective of this study was to determine the effects of wastewater sludge-fly ash mixtures on urease, dehydrogenase, alkaline phosphatase and β-glucosidase activities in soils. In order to evaluate the probable effects of previous soil management practices (irrigation with polluted water) on soil enzymes, two different soil samples which were similar in physical properties, but different in irrigation practice were used. The application of wastewater sludges supplemented with varying doses of fly ash increased potential enzyme activities for a short period of time (3 months) in comparison to unamended soils. However, the activity levels generally showed a decreasing trend with increasing ash ratios indicating the inhibitory effect of fly ash. The urease and dehydrogenase activities were particularly lower in soils irrigated from a polluted stream, indicating the negative effects of the previous soil management on soil microbial activity.
机译：这项研究的目的是确定废水污泥-粉煤灰混合物对土壤中脲酶，脱氢酶，碱性磷酸酶和β-葡萄糖苷酶活性的影响。为了评估以前的土壤管理实践（用污水灌溉）对土壤酶的可能影响，使用了两种物理性质相似但灌溉实践不同的土壤样品。与未改良的土壤相比，添加了不同剂量粉煤灰的废水污泥可在短时间内（3个月）增加潜在的酶活性。然而，随着灰分比的增加，活性水平通常显示出降低的趋势，这表明了飞灰的抑制作用。在由污染水流灌溉的土壤中，脲酶和脱氢酶的活性特别低，表明先前土壤管理对土壤微生物活性的不利影响。

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