Qualidade fisiológica de sementes de algodoeiro submetidas a tratamento com bioinsumo a base de Bacillus aryabhattai e arbolina.

Abstract

The cotton plant crop presents high sensitivity to water deficit, which compromises its development and productivity. In this context, the present study had as objective to evaluate the effects of the cotton seed treatment with Bacillus aryabhattai and Arbolina on germination, emergence, rooting, development and productivity of the crop submitted to water stress. The experiment was conducted on a laboratory and a greenhouse, utilizing BRS 700 B3RF cultivar seeds. The experimental design adopted was completely randomized in a 2 × 4 × 2 factorial scheme, considering the presence or absence of Bacillus aryabhattai (Auras️) inoculation, four doses of Arbolina (0, 2, 4 e 8 mL kg⁻¹ of seed) and two water regimes (irrigated and deficit). The analyzed variables included germination and emergence rates, emergence The cotton plant crop presents high sensitivity to water deficit, which compromises its speed index, shoot and root systems dry mass, as well as the plant development under water stress conditions. The laboratory results indicated a significant effect of Auras (Bacillus aryabhattai) and Arbolina treatments on germination and root development, with the 4 ml kg⁻¹ Auras dose showing the highest germination percentage. The interaction between the factors significantly influenced the seedling emergence and the germination speed index. Complementary studies will be conducted to evaluate the impacts on the final crop productivity.