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谷物树根球微生物组经历了与作物生产率相关的气循环协会的宿主选择

Simon Lewin¹, Sonja Wende¹, Marc Wehrhan²

¹Working Group Microbial Biogeochemistry, Research Area Landscape Functioning, Leibniz Centre for Agricultural Landscape Research e.V. (ZALF), Müncheberg, Germany.

The Science of the total environment

|November 24, 2023

概括

减少肥对作物微生物组功能产生影响. 与大麦和小麦不同的是,当N肥料减少时,麦植物保持了像类植物和DNRA这样的有益微生物,这表明谷物作物的弹性不同.

科学领域:

农业科学农业科学
微生物学微生物学
土壤科学土壤科学

背景情况:

可持续农业需要减少 (N) 肥料的应用.
减少N输入可以改变作物-树球微生物群的共生,可能会影响作物生产.
在农业规模上评估微生物组的功能变化是一项挑战.

研究的目的:

研究降低肥对冬季大麦,小麦和麦根球中的N循环微生物协会的影响.
将微生物N循环组成与作物生产率和土壤参数联系起来.
了解作物物种对减少N输入的特定适应.

主要方法:

实地图实验与减少的N受精.
远程传感用于树苗生物质评估.
代代基因组学用于分析二氧化物,化物,非化物和DNRA协会.
回归分析以确定微生物协会,作物生产率和土壤pH之间的关系.

主要成果:

微生物N自行车协会的组成在作物物种之间差异很大,受作物生产率和土壤pH的影响.
特定微生物协会的丰富性对N化肥和作物类型的反应不同.
在没有N受精的情况下,树根球显示了N-保存协会 (diazotrophs,DNRA) 的丰富.
地下微生物组模式与地面植物生产力相关.

结论:

种植物种表现出不同的共生策略,影响它们对降低肥的适应性.
在低N条件下,生麦显示出潜在的优越能力来维持N循环微生物.
树枝球微生物组的组成与作物宿主物种和植物生产力有关,为可持续农业提供了洞察力.

关键词:

这是DNRA.这种动物是Diazotrophs.甲基基因组是指甲基因组中的一部分.遥感是一种远程传感.麦是一种麦.小麦小麦小麦小麦的小麦.

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