The combination of poultry litter, vivianite powder and mycorrhizae: A suitable natural fertilizer for improving nutritional values of soybean (Glycine max Linn. Merril)

InformationThis study evaluated the effect of combining variaous natural fertilizers on soybean nutritional values.The field study followed a randomized complete block design with 11 treatments and 03 replications.Treatments were applied to growing soybean plants: 30 g of poultry litter (F1), 60 g of poultry litter (F2), combination of 10 g of mycorrhizae + 10 g of vivianite powder (MP), combination of 10 g of mycorrhizae + 30 g of poultry litter (MF1), combination of 10g of mycorrhizae + 60 g of poultry litter (MF2), 10 g of vivianite powder +30 g of poultry litter (PF1), 10g of vivianite powder + 60 g of poultry litter (PF2), 10 g of mycorrhizae +10g of vivianite powder +30 g of poultry litter (MPF1), 10 g of mycorrhizae +10 g of vivianite powder +60 g of poultry litter (MPF2), chemical fertilizer (T+) and plants without fertilizers (T-).Seeds physical characteristics, such as thickness and weight were assessed.Evaluated seeds chemical properties were: protein content, oil content and total sugar content.Results show that seed weight from MPF2 treated plants was 1.43, and 3.64 times higher than those from T-and T+ treated plants respectively.MPF2 treatment increased the protein content of soybean seeds by 135.80% and 262.76 % compared to T-and T+ treatments respectively.In conclusion, the production and application of the mixture of 10 g of mycorrhizae + 10 g of vivianite powder + 60 g poultry litter per hole at sowing for soybean growing would contribute to improve soybean nutritional values, and valorize the employment of local material in organic farming, as well as to protect the environment.