用在屠宰场培养的微藻修改土壤中的动力学和生物过程消化,以回收营养物质
Hajar Shayesteh1, Sasha N Jenkins2, Navid R Moheimani1
1Algae R&D Centre, School of Environmental and Conservation Sciences, Murdoch University, WA 6150, Australia; Centre for Water, Energy and Waste, Harry Butler Institute, Murdoch University, Murdoch, WA 6150, Australia.
Journal of environmental management
|July 8, 2023
概括
湿微藻生物质是比干燥生物质更好的土壤肥料. 潮湿的微藻类通过增强对的仿真酸盐降解 (DNRA) 来促进农业土壤中的营养保留.
科学领域:
- 环境科学 环境科学
- 土壤科学 土壤科学
- 微生物学 微生物学
背景情况:
- 微藻被用于废水中的营养回收,生物质转化为肥料,促进循环经济.
- 干燥微藻生物质的成本和土壤营养循环的影响尚未完全理解.
- 将湿微藻和干微藻作为土壤修饰品进行比较,需要对土壤化学和微生物动态进行研究.
研究的目的:
- 为了比较湿和干微藻对土壤化学,微生物生物质,二氧化碳呼吸和细菌社区多样性的影响.
- 评估与微藻修改的土壤中 (N) 和碳 (C) 循环过程中涉及的功能基因.
主要方法:
- 一个56天的土壤化实验比较了湿和干的Scenedesmus sp. 微藻,经过控制处理 (葡萄糖,葡萄糖+酸,没有肥料).
- 测量了土壤化学,微生物生物质碳 (MBC) 和二氧化碳呼吸.
- 使用Illumina Mi-Seq进行了细菌社区多样性分析,并通过in-silico分析评估了参与N循环的功能基因 (amoA,nrfA).
主要成果:
- 与湿微藻相比,干燥的微藻导致17%更高的二氧化碳呼吸和38%更高的MBC.
- 这两种微藻的修正都在分解时缓慢释放NH4+和NO3-,与合成肥料不同.
- 有证据表明,异质化有助于酸盐的产生,而在湿微藻的修正案中,表示将酸盐降解为氨 (DNRA).
结论:
- 湿微藻修正案促进了DNRA,导致农业土壤中气保留率增加.
- 干燥微藻生物质可能不适合肥料生产,因为它减少了气保留的好处.
- 湿微藻是一种有希望的可持续肥料选择,增强土壤健康和营养循环效率.
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