Produção de forragem de azevém (Lolium multiflorum) com diferentes fontes de adubação fosfatada

Abstract

Annual ryegrass (Lolium multiflorum) is the most used forage crop in the cold season because it is adapted to environmental conditions and due to its great productive potential. Organomineral fertilizer has a relatively lower reactive chemical potential than mineral fertilizer, but its solubilization is gradual during the development period of the crop, when its agronomic efficiency may become greater when compared to soluble mineral sources. This work aims to verify the agronomic efficiency of different phosphate fertilizers in the ryegrass culture. The experiment was conducted in the conventional system in the agricultural year of 2019. The experimental design was the DIC, (completely randomized design) with 6 treatments and 4 repetitions. The treatments were: Control without P (only N and KCI), mineral fertilizer, organomineral fertilizer 1, organomineral fertilizer 2, organomineral fertilizer 3 and organic fertilizer. Evaluations of dry mass production, percentage of DM in the MV were carried out, the Agronomic Efficiency Index (IEA) and the economic performance of the treatments were calculated. The results were subjected to analysis of variance. The averages were compared using the scott-knott test at 5% probability with the aid of the Sisvar software. It can be concluded that mineral fertilizer is the most economically viable, organomineral 1 presented the best economic efficiency index and there was similarity of forage production between mineral fertilizer, organomineral 1 (lignhito), organomineral 2 (chicken litter) and organomineral 3 (chicken bed). Therefore, mineral fertilizer is the one that obtained the best result in the experiment.