Desempenho produtivo do milho influenciado pela associação de fosfatos e inoculação com Bacillus sp.

Abstract

The cerrado usually has soils of the Latosols type, where they have a low 30 amount of phosphorus, due to their mineralogical nature and acidic reaction, which is 31 why it is necessary to carry out phosphate fertilization, and thus seek higher yields. The 32 objective of this work was to evaluate the productive performance of maize in response 33 to isolated or associated application of a natural and soluble source of P, in the presence 34 and absence of inoculation with Bacillus sp. The work was carried out in the 35 experimental area of the Federal University of Mato Grosso do Sul Foundation, in the 36 municipality of Chapadão do Sul – MS. The experiment was carried out in a 37 randomized block design with five replications in a strip scheme. The first factor 38 consisted of the presence or absence of BiomaPhos, while the second factor consisted of 39 P2O5 sources. The treatments were: T1 (control – without P application), T2 (100 kg 40 P2O5 ha-1 – super simple – (SS), T3 (4 t ha-1 of rock phosphate - FN) and T4 (100 kg 41 P2O5 ha -1 of SS + 4 t ha-1 of FN (total P2O5 = 6.068%). The plant height, ear 42 insertion height, stem diameter, the relative chlorophyll index, thousand grain mass, ear 43 diameter, and grain yield were evaluated. The highest yields are found in the presence 44 of Biomaphos and mineral P (SS) regardless of whether organic P was present or noT