유기농경지 재배 유형에 따른 토양 미생물 활성 및 군집 특성
Soil Microbial Activity and Community Characteristics by Organic Agricultural Type
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Microorganism plays important roles in plant growth and health. Organic farming is known to play positive effect on microbial abundance and activity. Our study investigated the microbial characteristics of soil in various cultivation types, such as fields, orchards, rice paddies, and greenhouse. In this study we analyzed the soil chemical properties, microbial dehydrogenase activity, microbial carbon substrate utilization analysis and microbial community analysis using next-generation sequencing. As a result of soil chemical properties, organic matter content showed the highest value in orchard soil and the lowest value in greenhouse soil. Greenhouse soil showed the highest level of EC value. Dehydrogenase activity and community level physiological profiling (CLPP) were the highest in the farmland soil. Microbial carbon substrate utilization analysis, high values were shown in farmland soil and orchards and low values were shown in rice paddies and greenhouse soil. This was thought to be due to the influence of microbial community distribution. Bacterial community analysis show that Pseudomonadota, Bacilota and Chloloflexota were predominant phylum in all type fields. In the case of orchards, it is thought that Psuedomonadota, which increases when the organic matter content is rich, showed a high distribution, and in the case of paddies Chloroflexota which increases when the organic matter content is low, showed a high distribution. The numbers of operational taxonomic units (OTU, defined at 97% similarity) and species richness were the highest in the farmlands soil. These results speculate that bacterial community were highly correlated with microbial enzyme activity. Additionally, various soil chemical properties such as available phosphorus and organic matter were main drivers for bacterial community composition. This study show that soil environment and microbial activity are highly correlated, suggesting that proper soil management is necessary.
Abstract
Microorganism plays important roles in plant growth and health. Organic farming is known to play positive effect on microbial abundance and activity. Our study investigated the microbial characteristics of soil in various cultivation types, such as fields, orchards, rice paddies, and greenhouse. In this study we analyzed the soil chemical properties, microbial dehydrogenase activity, microbial carbon substrate utilization analysis and microbial community analysis using next-generation sequencing. As a result of soil chemical properties, organic matter content showed the highest value in orchard soil and the lowest value in greenhouse soil. Greenhouse soil showed the highest level of EC value. Dehydrogenase activity and community level physiological profiling (CLPP) were the highest in the farmland soil. Microbial carbon substrate utilization analysis, high values were shown in farmland soil and orchards and low values were shown in rice paddies and greenhouse soil. This was thought to be due to the influence of microbial community distribution. Bacterial community analysis show that Pseudomonadota, Bacilota and Chloloflexota were predominant phylum in all type fields. In the case of orchards, it is thought that Psuedomonadota, which increases when the organic matter content is rich, showed a high distribution, and in the case of paddies Chloroflexota which increases when the organic matter content is low, showed a high distribution. The numbers of operational taxonomic units (OTU, defined at 97% similarity) and species richness were the highest in the farmlands soil. These results speculate that bacterial community were highly correlated with microbial enzyme activity. Additionally, various soil chemical properties such as available phosphorus and organic matter were main drivers for bacterial community composition. This study show that soil environment and microbial activity are highly correlated, suggesting that proper soil management is necessary.
참고문헌 (25)
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