编号：CDUT-2023-57

标题：Nutrients in the rhizosphere: A meta-analysis of content, availability, and influencing factors

入藏号：WOS:000790510100006

中国科学院文献情报中心期刊分区： 环境科学与生态学1区/TOP（2022）

本校作者：刘世宾；何发坤；肖胡萱；蒲生彦

来源出版物：SCIENCE OF THE TOTAL ENVIRONMENT  卷: 826  文献号: 153908

出版年：2022

第一地址：成都理工大学

关键词： Rhizosphere nutrient availability；Meta-analysis；Nutrient transformation；Accumulation and depletion of nutrients；Copiotrophs and oligotrophs

备注：本文已入围2023年5月ESI高被引论文（TOP Papers）

代表图：

摘要：Nutrient deficiency in most terrestrial ecosystems constrains global primary productivity. Rhizosphere nutrient avail-ability directly regulates plant growth and is influenced by many factors, including soil properties, plant characteristics and climate. A quantitatively comprehensive understanding of the role of these factors in modulating rhizosphere nu-trient availability remains largely unknown. We reviewed 123 studies to assess nutrient availability in the rhizosphere compared to bulk soil depending on various factors. The increase in microbial nitrogen (N) content and N-cycling re-lated enzyme activities in the rhizosphere led to a 10% increase in available N relative to bulk soil. The available phos-phorus (P) in the rhizosphere decreased by 12% with a corresponding increase in phosphatase activities, indicating extreme demand and competition between plants and microorganisms for P. Greater organic carbon (C) content around taproots (+17%) confirmed their stronger ability to store more organic compounds than the fibrous roots. This corresponds to higher bacterial and fungal contents and slightly higher available nutrients in the rhizosphere of taproots. The maximal rhizosphere nutrient accumulation was common for low-fertile soils, which is confirmed by the negative correlation between most soil chemical properties and the effect sizes of available nutrients. Increases in rhizosphere bacterial and fungal population densities (205-254%) were much higher than microbial biomass increases (indicated as microbial C: +19%). Consequently, despite the higher microbial population densities in the rhizosphere, the biomass of individual microbial cells decreased, pointing on their younger age and faster turnover. This meta-analysis shows that, contrary to the common view, most nutrients are more available in the rhizosphere than in bulk soil because of higher microbial activities around roots.

文章链接地址: https://www.sciencedirect.com/science/article/pii/S0048969722010002?via%3Dihub