Effect of bio-inoculation and variety in phenolic compounds content of rosella hibiscus sabdariffa L. Sepals

Abstract

The experiment was conducted in Al-Mahaweel district (25 km north of Babil Governorate) during the spring season 2020, for the purpose of knowing the effect of bio-fertilizers on the content of some phenolic substances in the sepals of Rosella, A factorial experiment was applied according to the Complete Randomized Blocks Design (R.C.B.D). The study included two factors, the first factor included three types of gujarat (red, white and lined) and the second factor was biofertilization (adding soil to the soil immediately before planting) at three levels (control, Azotobacter and fungal biofertilization using Mycorrhiza fungi). The results of the statistical analysis showed the red variety was significantly superior to the other two varieties in all phenolic substances, as well as the bio-fungal fertilization treatment achieved the highest means, significantly superior to the rest of the other treatments. The interaction treatment (red variety + Mycorrhiza) recorded the highest means of Sabdaretine(0.099) mg.L-1, Gossypetine(0.183) mg.L-1, Delphinidin-3- glucoside(0.122) mg.L-1, Quercetin(0.120) mg.L-1, Kaempferol(0.143) mg.L-1.