Efeito de bioestimulantes e nutrientes em características fisiológicas de sementes de milho

Abstract

Corn is the most produced cereal in the world. However, although this 27 crop has the capacity to achieve high production potential, in Brazil, the average level of 28 productivity is considered low, making it necessary to implement new technologies that 29 can promote an increase in productivity, such as the use of phytohormones and 30 biostimulants. Thus, the objective of this work was to evaluate the effect of 31 biostimulants and nutrients on germination and initial development of maize seeds. The 32 experimental design used was completely randomized, with 8 treatments and four 33 replications. Treatments consisted of application of Stimulate, Baltiko, Nicotinamide, 34 Active seeds, Control Active Seeds, Cobalt + Molybdenum and Azospirillum, plus the 35 control treatment. The germination test, first germination count, emergence, 36 germination speed index, shoot and root length, shoot and root dry mass, and total dry 37 mass were performed. Despite the application of Baltiko harming the speed of 38 emergence of corn seedlings, this biostimulant increases the components of shoot and 39 root length, and shoot, root and total dry mass of corn, being recommended for better 40 initial development of corn seedlings. The application of Azospirillum brasilense, 41 activating seeds and Stimulate also promotes longer corn shoot length.