A global meta-analysis of animal manure application and soil microbial ecology based on random control treatments

Abstract

The processes involved in soil domestication have altered the soil microbial ecology. We examined the question of whether animal manure application affects the soil microbial ecology of farmlands. The effects of global animal manure application on soil microorganisms were subjected to a meta-analysis based on randomized controlled treatments. A total of 2303 studies conducted in the last 30 years were incorporated into the analysis, and an additional 45 soil samples were collected and sequenced to obtain 16S rRNA and 18S rRNA data. The results revealed that manure application increased soil microbial biomass. Manure application alone increased bacterial diversity (M-Z: 7.546 and M-I: 8.68) and inhibited and reduced fungal diversity (M-Z: −1.15 and M-I: −1.03). Inorganic fertilizer replaced cattle and swine manure and provided nutrients to soil microorganisms. The soil samples of the experimental base were analyzed, and the relative abundances of bacteria and fungi were altered compared with no manure application. Manure increased bacterial diversity and reduced fungal diversity. Mrakia frigida and Betaproteobacteriales, which inhibit other microorganisms, increased significantly in the domesticated soil. Moreover, farm sewage treatments resulted in a bottleneck in the manure recovery rate that should be the focus of future research. Our results suggest that the potential risks of restructuring the microbial ecology of cultivated land must be considered.

Changes in Canada's Phosphorus Cycle 1961–2018: Surpluses and Deficits

“…Another concern is that animal excreta often contains antimicrobial additives such as heavy metals and veterinary drugs, which could affect soil biology (Li et al., 2011). Several recent studies have focused on the role of renewable energy production as a way to overcome manure cost issues (Metson et al., 2022; Vanttinen, 2022); however, the manure transportation and fermentation process can also produce greenhouse gases, resulting environmental problems (Guo et al., 2022).…”

Improving nitrogen retention of cattle slurry with oxidized biochar: An incubation study with three different soils

“…As an organic fertilizer, livestock manure or slurry is usually land‐applied to increase soil organic matter (SOM) and soil microbial biomass and serves as a source of nitrogen (N) for plants (Guo et al., 2022; Ozlu et al., 2019). However, livestock slurry application to agricultural fields accounts for a large proportion of ammonia (NH 3 ) emissions, which contribute to environmental and public health problems (Bouwman et al., 2013).…”

“…As an organic fertilizer, livestock manure or slurry is usually land-applied to increase soil organic matter (SOM) and soil microbial biomass and serves as a source of nitrogen (N) for plants (Guo et al, 2022;Ozlu et al, 2019). However, livestock slurry application to agricultural fields accounts for a large Abbreviations: CEC, cation exchange capacity; DOC, dissolved organic carbon; GHG, greenhouse gas; SC, soil with cattle slurry; SCB, soil with cattle slurry and biochar; SCO, soil with cattle slurry and oxidized biochar; SOC, soil organic carbon; SOM, soil organic matter; TN, total nitrogen; TOC, total organic carbon.…”

Effects of vegetation restoration on soil organic carbon in the Loess Plateau: A meta‐analysis

“…It extracts experimental data from many independent studies and quantifies the average response degree produced by a certain treatment (or experimental design) to reveal general laws that cannot be revealed by a single experiment (Song et al, 2022). Since its introduction to ecological research in the early 1990s, meta‐analysis has been rapidly applied to solve various ecological problems (Guo et al, 2022). In recent years, meta‐analysis has been increasingly applied in large‐scale ecological research on global changes, especially in the impact of vegetation restoration or land use change on SOC (Zhang, Chen, et al, 2022), and is regarded as the best quantitative, comprehensive method so far.…”