Qualidade fisiológica de sementes de Soja (Glycine max (L.) Merrill) em resposta ao tratamento com fertilizantes

Abstract

Brazil is the largest producer and largest exporter of soy in the world. Each year, grain production is expanded, mainly due to the greater productive capacity of crops, combining genetics of cultivars and production technologies. Among the techniques most used by soy producers is seed treatment, which consists of applying chemical or biological products directly to the seeds before sowing. The objective of seed treatment is to protect the seeds against pathogens and insects, as well as to promote the proper initial development of the crop. The use of biostimulants and nutrients based on zinc, molybdenum, among other compounds, has been widely studied regarding their efficiency and influence on seed quality. The objective of this work was to evaluate the quality of seeds through germination and emergence tests in soybean cultivars treated with the commercial product foliar fertilizer Oro-Cinetic®. Four soybean cultivars (RK6813RR, RK5813RR, RK7518IPRO and Desafio) and six doses of Oro-Cinetic® (White, zero, full dose, half dose, one third dose and one quarter dose) were evaluated in a 4 x 5 factorial. in the seed treatment, adding the control treatment and the application of sugar as an adjuvant. The percentages of germination, abnormal seedlings and dead seeds were calculated from the germination test, as well as the emergence speed in the field test. Data were analyzed by analysis of variance, followed by Tukey's test for the cultivar factor and regression analysis for the dose factor. In all variables studied, the cultivar RK 7518 showed lower responses to seed treatment with fertilizer. Regardless of the dose used, the cultivar RK6813 was superior to the others. From dose 2 on, the cultivars Desafio, RK5813 and RK 6813 had an improvement in the expression of vigor by the first germination reading.