Hairy vetch, compost and chemical fertilizer management effects on red pepper yield, quality, and soil microbial population

Organic fertilizers may contribute substantially to improving yield, soil quality, and reducing the environmental impacts of conventional farming. This study investigates the effects of organic fertilizers, like green manure composed of hairy vetch (HV), livestock compost (LC), or a combination of the two (LC + HV), has on red pepper growth, yield, fruit quality, and soil microbial populations as compared to more commonly used chemical fertilizers. This study investigates the effects of different fertilizer treatments on red pepper growth, yield, quality, and soil microbial populations. The experimental plot treatments were no fertilizer (CON), chemical fertilizer, HV, LC and LC + HV. In these treatments, 70-day-old red pepper plants were grown for an additional 140 days under treatment conditions. Plant dry weight, macro- and micro-nutrient contents were analyzed. Post-harvest soil properties and cultivable soil microbial population were determined. HV and LC + HV treatments had significantly high leaf and stem dry weight. All the treatments increased T–N, P and Mg contents in plants and the highest uptake was recorded for plants fertilized with HV. After harvest, soil fertilized with LC + HV had higher soil organic matter and available P, K and Ca as compared to chemical fertilizers. In addition, soil fertilized with organic fertilizers had significantly more cultivable microbial populations than chemical fertilizers. Overall, these results suggest that organic fertilizers could be used to reduce the application of synthetic fertilizers and aiding sustainable agriculture.