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首页> 外文期刊>Applied Microbiology >Effect of Soil Slope on the Appearance of Mycobacterium avium subsp. paratuberculosis in Water Running off Grassland Soil after Application of Contaminated Slurry
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Effect of Soil Slope on the Appearance of Mycobacterium avium subsp. paratuberculosis in Water Running off Grassland Soil after Application of Contaminated Slurry

机译：土壤坡度对鸟分枝杆菌亚种外观的影响应用污染性泥浆后流失草地土壤中水的副结核病

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The study assessed the effect of soil slope on Mycobacterium avium subsp. paratuberculosis transport into rainwater runoff from agricultural soil after application of M. avium subsp. paratuberculosis -contaminated slurry. Under field conditions, 24 plots of undisturbed loamy soil 1 by 2 m~(2) were placed on platforms. Twelve plots were used for water runoff: 6 plots at a 3% slope and 6 plots at a 15% slope. Half of the plots of each slope were treated with M. avium subsp. paratuberculosis -contaminated slurry, and half were not treated. Using the same experimental design, 12 plots were established for soil sampling on a monthly basis using the same spiked slurry application and soil slopes. Runoff following natural rainfall was collected and analyzed for M. avium subsp. paratuberculosis , coliforms, and turbidity. M. avium subsp. paratuberculosis was detected in runoff from all plots treated with contaminated slurry and one control plot. A higher slope (15%) increased the likelihood of M. avium subsp. paratuberculosis detection but did not affect the likelihood of finding coliforms. Daily rainfall increased the likelihood that runoff would have coliforms and the coliform concentration, but it decreased the M. avium subsp. paratuberculosis concentration in the runoff. When there was no runoff, rain was associated with increased M. avium subsp. paratuberculosis concentrations. Coliform counts in runoff were related to runoff turbidity. M. avium subsp. paratuberculosis presence/absence, however, was related to turbidity. Study duration decreased bacterial detection and concentration. These findings demonstrate the high likelihood that M. avium subsp. paratuberculosis in slurry spread on pastures will contaminate water runoff, particularly during seasons with high rainfall. M. avium subsp. paratuberculosis contamination of water has potential consequences for both animal and human health.
机译：该研究评估了土壤坡度对鸟分枝杆菌亚种的影响。应用鸟分支杆菌亚种后副结核病从农业土壤运入雨水径流。副结核病污染的浆液。在田间条件下，在平台上放置了24块未扰动的壤土1×2 m〜（2）。十二个地块用于径流：6个地块的坡度为3％，六个地块的坡度为15％。每个坡度的一半地块用鸟分枝杆菌亚种处理。副结核病污染的浆液，一半未得到处理。使用相同的实验设计，使用相同的加料浆和土壤坡度，每月建立12个样地用于土壤采样。收集自然降雨后的径流并分析鸟分枝杆菌亚种。副结核病，大肠菌群和浑浊。鸟分枝杆菌亚种在所有用污染泥浆处理过的地块和一个对照地块的径流中检测到了副结核病。较高的斜率（15％）增加了鸟分枝杆菌亚种的可能性。副结核病检测，但不影响发现大肠菌的可能性。每日降雨增加了径流产生大肠菌群和大肠菌群浓度的可能性，但减少了鸟分枝杆菌亚种。副结核病在径流中的浓度。没有径流时，降雨与鸟分枝杆菌亚种增加有关。副结核病浓度。径流中的大肠菌群计数与径流浊度有关。鸟分枝杆菌亚种副结核病的存在与否与浊度有关。研究时间减少了细菌的检测和浓度。这些发现表明鸟分枝杆菌亚种的可能性很高。分布在牧场上的淤浆中的副结核病会污染水的径流，特别是在降雨多的季节。鸟分枝杆菌亚种副结核病对水的污染对动物和人类健康都有潜在的影响。

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