Doses de gesso agrícola no solo e sua correlação com a produtividade da aveia preta inoculada ou não com Azospirillum brasilense, e da soja em sucessão

• Autor(a) principal: Cristovam, Maria Eduarda Pafetti
• Data de Publicação: 2021
• Tipo de documento: Trabalho de conclusão de curso
• Idioma: por
• Título da fonte: Repositório Institucional da UNESP
• Texto Completo: http://hdl.handle.net/11449/214296
• topic: Diazotrophic bacteria; Plaster; Inoculation; No-till system; Avena strigosa; Glycine max; Bactérias diazotróficas; Gessagem; Inoculação; Sistema plantio direto

The application of agricultural plaster has become frequent in agricultural production systems, as it provides improvements in subsurface soil layers. In addition to the use of plaster, inoculation with growth-promoting bacteria, such as Azospirillum brasilense, has gained ground in these systems by reducing production costs and improving the performance of inoculated plants.Thus, the work aimed to evaluate the residual of the plaster doses (0, 0.5; 1; 1.5; 2 x the calculated dose) according to the recommendation methodology of Caires and Guimarães (2016), applied 24 months before the cultivation of black oats with seeds inoculated or not with Azospirillum brasilense, correlating them with the production of dry matter, and soybean yield in a OXISOL in the Cerrado, in Selvíria – MS, Brazil, with an experimental design of randomized blocks in a 5x2 factorial scheme, in the 2019/20 harvest. The inoculation with A. brasilense in the black oat crop increases the production of dry matter, providing a better soil coverage, interesting for the no-tillage system. There was a positive response, with quadratic adjustment, and maximum efficiency of plaster at a dose of 4871 kg ha-1 , that is, close to the standard dose (5700 kg ha-1 ) calculated and applied in 2017. The inoculation of A. brasilense also provided lower levels of Aluminum and higher levels of calcium, magnesium and V%, when compared to uninoculated ones, in layers 0-0.10, 0.10-0.20 and 0.20-0.40 m, 24 months after plastering. Inoculation with A. brasilense in pre-soybean grass crops increases grain yield.