Fig 3 - uploaded by Yujia Luo
Content may be subject to copyright.
Venn diagrams illustrating the number of the unique and shared bacterial ASVs (A) and fungal OTUs (B) in the soil, OAs, and OA-amended soils after 90 d of incorporation. The numbers in parentheses are the percentages of the unique and shared ASVs or OTUs in OAs.
Source publication
The application of organic amendments (OAs) obtained from biological treatment technologies is a common agricultural practice to increase soil functionality and fertility. OAs and their respective pretreatment processes have been extensively studied. However, comparing the properties of OAs obtained from different pretreatment processes remains cha...
Contexts in source publication
Context 1
... microbes were more prevalent in the soil than ferment-and digestate-associated microbes after incorporation into the soil. Most of the microbes initially present in the compost, particularly 88% of bacterial ASVs (Fig. 3A) and 83% of fungal OTUs (Fig. 3B), were detected in the soil 90 d after incorporation. Some bacteria (28% of ASVs) and fungi (81% of OTUs) were present in the soil prior to compost incorporation. The prevalence of digestate-and ferment-associated microbes in the soil was similar. Approximately 50% of bacterial ASVs and 70% of fungal ...
Context 2
... microbes were more prevalent in the soil than ferment-and digestate-associated microbes after incorporation into the soil. Most of the microbes initially present in the compost, particularly 88% of bacterial ASVs (Fig. 3A) and 83% of fungal OTUs (Fig. 3B), were detected in the soil 90 d after incorporation. Some bacteria (28% of ASVs) and fungi (81% of OTUs) were present in the soil prior to compost incorporation. The prevalence of digestate-and ferment-associated microbes in the soil was similar. Approximately 50% of bacterial ASVs and 70% of fungal OTUs associated with digestate and ...
Citations
... In addition, composting using inorganic bulking agents has been shown to enhance the nutrient profile of the compost, making it a feasible component for potting soil or garden soil amendments [10]. Thus, utilization of organic amendments from composting processes can result in the formation of sustainable soils by enhancing soil functionality and fertility through efficient recycling of organic resources [129]. ...
... Following MSW compost repeated application, soil C and N content has been enriched, enzymatic activities have been modified and microbial community dynamics impacted, relevant to both agricultural and landscaping uses [45]. Another study emphasized that application of garden waste compost improves desalination efficiency, nutrient availability, and microbial diversity in coastal saline soils, ensuring an ecological restoration practice [129]. In vineyards, compost application has been recently considered because of its potential to improve soil health, whilst considering the key environmental trade-off-GHGs emissions [156]. ...
With increases in global population and urbanization, the production of Municipal Solid Waste (MSW) is growing rapidly, thus contributing to social and environmental concerns for sustainable waste management. This study addresses the research gap in optimizing composting, hypothesizing that integrating best practices and recent innovations can enhance the efficiency of the process. Data were collected through a systematic review of existing literature using Google Scholar and Scopus databases. The review provides an overview of municipal organic waste composting, outlining its processes, benefits, and challenges with the aim of identifying key area of further improvement and possibilities of adopting recent technological innovations. The analysis emphasized that technological advances in composting, as microbial inoculants or in-vessel composting have greatly improved the efficiency and quality of the resulting compost. However, several challenges remain, including managing contaminants such as heavy metals and microplastics, ensuring the compost quality and safety and addressing socioeconomic barriers that prevent widespread adoption. Moreover, process optimization, environmental and economic evaluation, as well as political and public involvement are essential to unlock the whole potential of composting systems.
... Of these four phyla, Bacteroidota and Bacillota are often associated with the conditions of anaerobic digestion that are involved in the production of digestates, and the initial state of the bacterial community in the planted pots treated with digestates at 3 DAT show a high concentration of one or both phyla, similarly to what is reported in a previous study [20]. In particular, it is interesting to notice that in most cases the members of the Bacillota phylum in the digestate treatments belong to either the Sporolactobacillaceae or Clostridiaceae, characterized by being acid-tolerant and being involved in the anaerobic digestion processes and, for the latter, also possibly involved in the nitrogen cycle [49,50]. ...
Among the many inputs, nitrogen fertilizers are the main yield-limiting factor in agriculture. Liquid fractions of digestates can be a most promising substitute to synthetic nitrogen fertilizers, using little energy to turn waste into valuable fertilizers. In this study, the efficacy of five digestates from different origin (C, cow slurry; P, pig slurry; PCE, pig slurry, cow slurry, energy crops; SS, sewage sludge; W, organic fraction of municipal waste) were assessed as fertilizers for the cultivation of Lactuca sativa L., compared to traditional mineral fertilization. Digestates showed promising results as fertilizers for Lactuca sativa L., as yield and chemical parameters were overall comparable to the mineral fertilizer. Analysis of nitrogen evolution showed that most digestates showed higher nitrates in the substrates than the mineral fertilizers at earlier stages. Another topic investigated in the study is the effect of the digestates on the bacterial populations of the growth substrate, investigated through quantification and sequencing of 16S gene. These results varied based on the digestate considered, but, in general, an increase in biodiversity could be linked to use of digestates. These results suggest that digestates might become an alternative to mineral fertilizers, contributing to the circular economy and waste reduction.
... Additionally, vermicomposting and vermifiltration represent two distinct methods of earthworm-mediated waste management, each with its own unique processes and applications (Enebe and Erasmus, 2023;Saapi et al., 2024). These distinctions may introduce specific physico-chemical and microbial characteristics, ultimately impacting the final composition and functionality of the vermicompost produced (A'ali et al., 2017;Rynk et al., 2022;Stehouwer et al., 2022;Luo et al., 2023). Therefore, it is crucial to investigate whether these distinctions lead to differential impacts on soil health, nutrient availability, and plant growth. ...
Vermifiltration is a promising technique that can help recover nutrients from wastewater for further use in agriculture. We conducted a field experiment to assess the effectiveness of vermicompost produced from the vermifiltration of liquid waste (manure and food production waste) and how it can affect the soil health and yield of a squash crop. We tested the effect of three rates of vermicompost (low, medium, and high) applied over two consecutive years and measured physical, chemical, and biological soil health indicators, squash yield, and nutritional status. The results showed that the use of vermicompost, especially at a high rate, increased total soil carbon, total nitrogen, potentially mineralizable nitrogen, and particulate organic matter, as well as the activity of C-N-P cycling enzymes, as compared to a control with only inorganic fertilization. The yield of the squash crop remained stable, while the crop nutritional value improved as the levels of boron and copper in the treated squash increased. These findings indicate an improvement in soil health after the use of vermicompost. Overall, results strongly support using this type of vermicompost as a sustainable management approach to recycle nutrients and enhance soil health.
... Additionally, vermicomposting and vermifiltration represent two distinct methods of earthworm-mediated waste management, each with its own unique processes and applications (Enebe and Erasmus, 2023;Saapi et al., 2024). These distinctions may introduce specific physico-chemical and microbial characteristics, ultimately impacting the final composition and functionality of the vermicompost produced (A'ali et al., 2017;Rynk et al., 2022;Stehouwer et al., 2022;Luo et al., 2023). Therefore, it is crucial to investigate whether these distinctions lead to differential impacts on soil health, nutrient availability, and plant growth. ...
Soil salinity is a major challenge in many developing countries, affecting soil fertility and crop productivity. Salinity directly affects the soil microbiome through osmotic pressure and ion toxicity, resulting in diminished microbial biomass and activity. Additionally, indirect repercussions involve reduced organic carbon inputs and aggregate stability, reducing microbial diversity and functions. Salinity induces a microbial community shift toward the abundance of halotolerant and halophile microorganisms. The use of organic amendments is a promising approach. Indeed, the application of vermicompost, with its rich nutrient and organic matter content, proves effective in counteracting the impact of salinity on the soil microbiome by providing available nutrients, decreasing the plasmolysis of cells by reducing the Na+/K+and Na+/Ca2+ratios, improving the soil texture, increasing the microbial diversity, and shifting the soil microbiome toward the abundance of beneficial soil microbiota. Despite these positive effects, carefully considering the initial EC of both soil and vermicompost and the applied quantity is crucial to ensuring maximum benefits. Overall, vermicompost holds considerable potential as a sustainable management strategy to mitigate the impact of salinity on soil microbiome, promoting overall soil health and enhancing crop production.
