Banca de DEFESA: ANA VITÓRIA DA SILVA ARAÚJO

Uma banca de DEFESA de MESTRADO foi cadastrada pelo programa.
STUDENT : ANA VITÓRIA DA SILVA ARAÚJO
DATE: 02/10/2023
TIME: 09:00
LOCAL: Prédio Prof. Mateus Rosas Ribeiro
TITLE:

Microbial Biofertilizer in Soybean (Glycine Max (L.) Merrill) in Semi-Arid Region Soil

KEY WORDS:

Acidithiobacillus. Soybean. Biological Nitrogen Fixation

PAGES: 33
BIG AREA: Ciências Agrárias
AREA: Agronomia
SUBÁREA: Ciência do Solo
SUMMARY:

The production of soybeans in Brazil has experienced significant growth in recent decades, becoming one of the country's most important crops. Initially concentrated in the Southern region, the expansion of soybean cultivation to the Northeast of Brazil is a remarkable phenomenon. The advancement of soybeans has been driven by various factors, including the search for available land for agricultural expansion and the adoption of sustainable farming techniques, which have contributed to the success of the crop in the region. This study utilized the biofertilizer BNPK, derived from phosphate and potassium rocks, enriched with elemental sulfur, and inoculated with the bacterium Acidithiobacillus thiooxidans, along with organic matter inoculated with a free-living diazotrophic bacterium, in comparison to the use of conventional fertilizers regarding their impact on increasing biomass production and nitrogen accumulation in the aboveground part of soybean plants (Glycine max L.). We also investigated the effect of inoculation with Bradyrhizobium strains (SEMIA 5079 and 587) recommended for soybeans and the possible interaction with the biofertilizer. The study was conducted in a greenhouse at the Federal Rural University of Pernambuco in Recife, PE, using soil collected from the Nossa Senhora do Rosário Farm, located in the municipality of Pesqueira. The experiment was conducted in a randomized block design in a greenhouse, using a 1x3x4 factorial scheme for a total of 12 treatments and 3 repetitions: absolute control (Without BNPK and without inoculation), mineral fertilizer (without inoculation, with SEMIA 5079 and SEMIA 587 inoculation), 100% biofertilizer (without inoculation, with SEMIA 5079 and SEMIA 587 inoculation), and 150% biofertilizer (without inoculation, with SEMIA 5079 and SEMIA 587 inoculation). The biofertilizer treatments were calculated for the recommended doses of NPK for soybean cultivation. The experiment's development involved the application of mineral fertilizer and biofertilizer with different doses and the planting of soybeans inoculated or not with Bradyrhizobium. Inoculation with the BNPK biofertilizer resulted in a significant increase in the number of nodules on the roots of soybean plants, as well as in the accumulation of nitrogen in the aboveground part. In the context of this experiment, the SEMIA-5079 strain of Bradyrhizobia was shown to be more effective than SEMIA-587 in promoting nodulation and nitrogen accumulation in soybean plants. We conclude that the soil in Pesqueira has favorable potential for soybean cultivation, highlighting the viability of using the BNPK biofertilizer in conjunction with Bradyrhizobia to optimize biomass production and nitrogen accumulation in the aboveground part of soybean plants.

COMMITTEE MEMBERS:
Externa ao Programa - ***.633.654-** - CAROLINA ETIENNE DE ROSALIA E SILVA SANTOS - UFRPE
Presidente - GISELLE GOMES MONTEIRO FRACETTO
Externa à Instituição - JÉSSICA RAFAELLA DE SOUSA OLIVEIRA