The impact of biochar and mineral fertilizers on photosynthetic pigments and relative water contents of okra, Abelmoschus esculentus (L.) Moench

The study aims to assess the impact of biochar and mineral fertilizers (NPK) on photosynthetic pigments and relative water contents of okra under field conditions.Six treatments (control, biochar 1%, N80P50K50 kg/ha, N120P75K75 kg/ha, biochar +N80P50K50+B kg/ha and biochar +N120P75K75+B kg/ha) were used in the experiment.After sixty days photosynthetic pigments and relative water contents of okra were measured.The data showed that mineral fertilizers and biochar treatments had a positive impact on photosynthetic pigments such astotal chlorophyll, chlorophyll a, chlorophyll b, and carotenoid contents of leaves in okra.A maximum of photosynthetic pigments content was recorded with biochar and NPK (120:75:75 kg/ha) treatment, which also resulted in enhanced total chlorophyll, chlorophyll a, chlorophyll b, and carotenoid contents of leaves in okra compared to other treatments.A combination of biochar and NPK (120:75:75 kg/ha) application mostly enhanced relative water content.