The Combination of Vivianite Powder and Compost Derived Poultry Litter: Appropriate Biological Fertilizer to Improve Nutritional Values of Carrot (Daucus Carota L.)

Aims: To improve the nutritional values of carrot in Great North Cameroon by using natural fertilizing.
 Study Design: A 11x2x2 factorial design with 11 origins roots (fertilizing) (T0, T+, P10, P15, Py10, Py15, F1, F1+P10, F1+P15, F1+Py10 and F1+Py15), 02 harvest areas (Maroua Ngaoundere (Cameroon)) years (2019 2020).
 Place Duration Study: Laboratory Biodiversity Sustainable Development, University Cameroon, September 2019 2020.
 Methodology: Nutrient parameters (moisture, vitamin C, carotenoids, fiber, carbohydrates ash contents) were assessed according to standard methods.
 Results: Globally, varied significantly (p<0.05) depending on fertilizer, area (Ngaoundere Maroua Cameroon), year 2020). The nutrient contents from higher than those Ngaoundere. highest nutrients content was F1+P10 plots (combination 1 Kg poultry litter 10 g vivianite powder). In Maroua, treated plants fertilizer are 1.55 1.24 fold richer carotenoids T0 T+ respectively ; growing 2020, carotenoid 1.52 1.29 plants. Ngaoundere, Vitamin C carrots is 1.79 that 1.18 2019, while 2020 value this parameter 1.69 1.47 respectively. encreased total carbohydrate at 51.88 % compared 20.03 27.59 7.95 Ngaoundere.
 Conclusion: By used for growing, we contribute vegetable crop, but also valorize our local resources biological agriculture, as well protect environment.