Manejo da adubação de base em soja no Noroeste do Rio Grande do Sul

Adequate practices in fields of seed and grain production are fundamental to achieve high productivity. The use of high quality seeds, as well as the correct nutritional management of the crop, are pillars to achieve high productivity. Thus, this study aimed to evaluate the performance of soybeans in the Northwest of the State of Rio Grande do Sul, submitted to different doses and sources of basic fertilization. The treatments consisted of the following combinations: 350 organomineral (T1), 350 mineral (T2), 530 organomineral (T3), 210 organomineral + 230 potassium chloride (T4), 210 mineral + 230 potassium chloride (T5) and 440 of organomineral + 230 Kg / ha of potassium chloride (T6). The experimental design used was a randomized block, evaluating the yield components and the physiological quality of the seeds produced. The best results in treatments Brazilian Journal of Development Braz. J. of Develop., Curitiba, v. 6, n. 6, p. 38913-38923 jun. 2020. ISSN 2525-8761 38915 T3 and T5, both treatments differed both in the source and in the fertilization dose. There were no major differences between the treatments that received mineral fertilizers or organomineral fertilizers, which makes organomineral fertilizers an option to be taken into account by the producer. The increase in doses of potassium and phosphate fertilization did not lead to an increase in the vigor of soybean seeds.