• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Journal of the air & waste management association >Intermittent agitation of liquid manure: effects on methane, microbial activity, and temperature in a farm-scale study
【24h】

Intermittent agitation of liquid manure: effects on methane, microbial activity, and temperature in a farm-scale study

机译：间歇性搅动液态肥料：在农场规模的研究中对甲烷，微生物活性和温度的影响

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Liquid manure storages are a significant source of methane (CH4) emissions. Farmers commonly agitate (stir) liquid manure prior to field application to homogenize nutrients and solids. During agitation, manure undergoes mechanical stress and is exposed to the air, disrupting anaerobic conditions. This on-farm study aimed to better understand the effects of agitation on CH4 emissions, and explore the potential for intentional agitation (three times) to disrupt the exponential increase of CH4 emissions in spring and summer. Results showed that agitation substantially increased manure temperature in the study year compared to the previous year, particularly at upper- and mid-depths of the stored manure. The temporal pattern of CH4 emissions was altered by reduced emissions over the subsequent week, followed by an increase during the second week. Microbial analysis indicated that the activity of archaea and methanogens increased after each agitation event, but there was little change in the populations of methanogens, archaea, and bacteria. Overall, CH4 emissions were higher than any of the previous three years, likely due to warmer manure temperatures that were higher than the previous years (despite similar air temperatures). Therefore, intermittent manure agitation with the frequency, duration, and intensity used in this study is not recommended as a CH4 emission mitigation practice. Implications: The potential to mitigate methane emissions from liquid manure storages by strategically timed agitation was evaluated in a detailed farm-scale study. Agitation was conducted with readily-available farm equipment, and targeted at the early summer to disrupt methanogenic communities when CH4 emissions increase exponentially. Methane emissions were reduced for about one week after agitation. However, agitation led to increased manure temperature, and was associated with increased activity of methanogens. Overall, agitation was associated with similar or higher methane emissions. Therefore, agitation is not recommended as a mitigation strategy.
机译：液态粪肥存储是甲烷（CH4）排放的重要来源。农民通常在田间施用前搅动（搅拌）液态肥料，以使养分和固体均质化。在搅拌过程中，粪便会受到机械应力并暴露在空气中，从而破坏厌氧条件。这项农场研究旨在更好地了解搅拌对CH4排放的影响，并探索有意搅拌（三次）破坏春季和夏季CH4排放指数增长的潜力。结果表明，与上一年相比，本研究年度的搅拌大大提高了粪便温度，尤其是在储存粪肥的中上深度时。 CH4排放的时间格局因随后一周的排放减少而改变，随后在第二周增加。微生物分析表明，每次搅动后古细菌和产甲烷菌的活性均增加，但产甲烷菌，古细菌和细菌的种群变化不大。总体而言，CH4排放量高于前三年中的任何年份，这可能是由于肥料温度高于前几年（尽管气温相似）所致。因此，不建议在本研究中使用频率，持续时间和强度的间歇性粪便搅动作为减少CH4排放的做法。启示：在一项详细的农场规模研究中，评估了通过策略性定时搅拌来减轻液态粪肥存储中甲烷排放的潜力。使用容易获得的农场设备进行搅动，目标是在初夏时，当CH4排放成指数增加时，破坏产甲烷菌群落。搅拌后，甲烷排放量减少了大约一周。但是，搅动导致粪肥温度升高，并与产甲烷菌的活性增加有关。总体而言，搅动与甲烷排放量相似或更高有关。因此，不建议将搅拌作为缓解策略。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号