Integrated Effect of Organic, Biological, and Chemical Fertilizers on Roselle's (Hibiscus sabdariffa L.) Growth and Quality Characteristics

This study investigates the effects of integrated nutrient management on Roselle's quantitative and qualitative traits (Hibiscus sabdariffa). The experiment assessed various treatments in a randomized complete block design with three replications over the ۲۰۲۱-۲۲ and ۲۰۲۲-۲۳ cropping seasons in the Jiroft region of Iran. These included ۱۰۰% recommended poultry manure (PM), ۱۰۰% recommended chemical fertilizer (CF), inoculation with arbuscular mycorrhizal fungi (AMF), application of Azospirillum (Az), their combined application (AMF + Az), and various combinations with reduced organic and chemical fertilization. Results showed that significant impacts of fertilizer treatments on Roselle's growth and quality traits. Specifically, the treatments of ۵۰% PM + Az and ۵۰% PM + ۵۰% CF yielded the highest plant height, total number of bolls per plant, bolls fresh weight per plant, sepal dry weight, biomass yield, and sepal harvest index. Moreover, the highest quality traits were observed in the ۵۰% PM + Az and ۵۰% PM + AMF + Az treatments. These integrated treatments are recommended for reducing CF usage while enhancing Roselle's production and quality.

کلیدواژه ها:

Azospirillum ، mycorrhiza ، Poultry manure ، Sepal yield