Dynamics of Microbial Ecology, Particulate Matter, and Bacterial Aerosols in Agriculture: Implications for Health and Sustainability

This research explores the complex interactions between agricultural activities, microbial ecology, particulate matter concentrations, and bacterial aerosols, with a focus on their implications for human health and agricultural sustainability. Through extensive field studies, we examined the distribution of Gram-positive and Gram-negative bacteria across different agricultural activities, revealing distinct patterns linked to these practices. Our results show that sowing and fertilization promote the proliferation of Gram-positive bacteria, while weeding favors Gram-negative species. Specifically, during sowing, Gram-positive bacteria made up 75% of the bacterial population, whereas during weeding, Gram-negative bacteria constituted 75%. Irrigation and harvesting displayed balanced microbial compositions, with each bacterial group representing 50% of the population. Additionally, we measured particulate matter concentrations during various agricultural tasks, finding elevated levels of PM1 (48 µg/m3 during weeding), PM2.5 (65 µg/m3 during weeding), PM10 (86 µg/m3 during weeding), CO2 (1027 ppm during irrigation), and formaldehyde (0.013 ppm during harvesting). These results highlight the need for targeted mitigation strategies to protect air quality and human health in agricultural settings. Our analysis of bacterial aerosols revealed significant variations in bioaerosol concentrations, ranging from 30 CFU/ml during weeding to 80 CFU/ml during fertilization. This underscores the importance of implementing effective risk management measures to address potential health impacts. Furthermore, we identified both pathogenic and beneficial bacterial species within agricultural ecosystems, stressing the importance of preventive measures against contamination while leveraging beneficial bacteria to improve crop productivity and soil fertility. Overall, this study enhances our understanding of the interplay between agricultural practices, microbial dynamics, and human health, informing more sustainable agricultural management practices.