A IMPORTÂNCIA DOS MICRORGANISMOS BENÉFICOS PARA A DISPONIBILIDADE DE FÓSFORO NO SOLO EM CULTIVO DE ARROZ

Abstract

Rice plays a crucial role in Brazilian agriculture, being produced mainly in Rio Grande do Sul and consumed as an essential source of nutrients in many parts of the world. Furthermore, the absorption of phosphorus by plants is essential for their growth and development. The objective of the research was to evaluate the development of rice seedlings, with the application of microorganisms at different levels of phosphorus. Thus, two experiments were carried out, where the first verified whether the bacteria carried out phosphorus solubilization and the second in a greenhouse with rice seedlings, where they used the bacteria in isolation with the application of the nutrient. Four forms of application of microorganisms were used, such as control (without microorganism), BRM 32111 (Burkholderia sp.), BRM 63523 (Serratia sp.) and BRM 65928 (Bacillus thuringiensis) at three different levels of phosphate fertilizer (100%, 50% and 0%), with five repetitions of each. The analyzes carried out were height of the shoot, biomass of the shoot and root; in winrhizo, length, diameter and volume were measured. The results show that all bacteria solubilize in phosphorus, but when used separately, the 50% dose obtained promising results. In conclusion, the use of rhizobacteria that promote plant growth is a biotechnological alternative that can contribute to food production in a more sustainable way.