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Do cover crops benefit soil microbiome? A meta-analysis of current research
Soil Biology and Biochemistry ( IF 9.7 ) Pub Date : 2020-01-02 , DOI: 10.1016/j.soilbio.2019.107701
Nakian Kim , María C. Zabaloy , Kaiyu Guan , María B. Villamil

Cover cropping is a promising sustainable agricultural method with the potential to enhance soil health and mitigate consequences of soil degradation. Because cover cropping can form an agroecosystem distinct from that of bare fallow, the soil microbiome is hypothesized to respond to the altered environmental circumstances. Despite the growing number of primary literature sources investigating the relationship between cover cropping and the soil microbiome, there has not been a quantitative research synthesis that is sufficiently comprehensive and specific to this relationship. We conducted a meta-analysis by compiling the results of 60 relevant studies reporting cover cropping effects on soil microbial properties to estimate global effect sizes and explore the current landscape of this topic. Overall, cover cropping significantly increased parameters of soil microbial abundance, activity, and diversity by 27%, 22%, and 2.5% respectively, compared to those of bare fallow. Moreover, cover cropping effect sizes varied by agricultural covariates like cover crop termination or tillage methods. Notably, cover cropping effects were less pronounced under conditions like continental climate, chemical cover crop termination, and conservation tillage. This meta-analysis showed that the soil microbiome can become more robust under cover cropping when properly managed with other agricultural practices. However, more primary research is still needed to control between-study heterogeneity and to more elaborately assess the relationships between cover cropping and the soil microbiome.



中文翻译:

覆盖作物对土壤微生物组有好处吗?对当前研究的荟萃分析

覆盖作物是一种有前途的可持续农业方法,具有增强土壤健康和减轻土壤退化后果的潜力。由于覆盖作物可以形成不同于裸露的农业生态系统,因此推测土壤微生物组可以对环境条件的变化做出反应。尽管越来越多的主要文献来源调查覆盖作物与土壤微生物组之间的关系,但仍没有足够全面和特定于这种关系的定量研究综合报告。我们通过汇总60项相关研究的结果进行了荟萃分析,这些研究报告了农作物覆盖对土壤微生物特性的影响,以估算总体影响大小并探讨该主题的当前情况。全面的,与裸露的耕作相比,覆盖耕作显着提高了土壤微生物丰度,活性和多样性参数,分别增加了27%,22%和2.5%。而且,遮盖作物的效果大小因农业协变量而不同,例如遮盖作物终止或耕作方法。值得注意的是,在诸如大陆性气候,化学覆盖作物终止和保护性耕作等条件下,覆盖作物的影响不太明显。这项荟萃分析表明,如果采用其他农业实践进行适当管理,则土壤微生物组在遮盖作物下会变得更加健壮。但是,仍然需要更多的基础研究来控制研究之间的异质性,并更详尽地评估覆盖作物与土壤微生物组之间的关系。分别是5%的裸休。而且,遮盖作物的效果大小因农业协变量而不同,例如遮盖作物终止或耕作方法。值得注意的是,在诸如大陆性气候,化学覆盖作物终止和保护性耕作等条件下,覆盖作物的影响不太明显。这项荟萃分析表明,如果采用其他农业实践进行适当管理,则土壤微生物组在遮盖作物下会变得更加健壮。但是,仍然需要更多的基础研究来控制研究之间的异质性,并更详尽地评估覆盖作物与土壤微生物组之间的关系。分别是5%的人(相比于裸露的人)。而且,遮盖作物的效果大小因农业协变量而不同,例如遮盖作物终止或耕作方法。值得注意的是,在诸如大陆性气候,化学覆盖作物终止和保护性耕作等条件下,覆盖作物的影响不太明显。这项荟萃分析表明,如果采用其他农业实践进行适当管理,则土壤微生物组在遮盖作物下会变得更加健壮。但是,仍然需要更多的基础研究来控制研究之间的异质性,并更详尽地评估覆盖作物与土壤微生物组之间的关系。在诸如大陆性气候,化学覆盖作物终止和保护性耕作等条件下,覆盖作物的影响不太明显。这项荟萃分析表明,如果采用其他农业实践进行适当管理,则土壤微生物组在遮盖作物下会变得更加健壮。但是,仍然需要更多的基础研究来控制研究之间的异质性,并更详尽地评估覆盖作物与土壤微生物组之间的关系。在诸如大陆性气候,化学覆盖作物终止和保护性耕作等条件下,覆盖作物的影响不太明显。这项荟萃分析表明,如果采用其他农业实践进行适当管理,则土壤微生物组在遮盖作物下会变得更加健壮。但是,仍然需要更多的基础研究来控制研究之间的异质性,并更详尽地评估覆盖作物与土壤微生物组之间的关系。

更新日期:2020-01-02
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