Aplicação de cobalto e molibdênio via foliar em dois estádios de desenvolvimento da cultura da soja

• Autor(a) principal: Santos, Raquel Soares dos
• Data de Publicação: 2021
• Tipo de documento: Trabalho de conclusão de curso
• Idioma: por
• Título da fonte: Repositório Institucional da UNESP
• Texto Completo: http://hdl.handle.net/11449/215914
• topic: Micronutrients; Foliar fertilization; Glycine max (L.) Merril; Micronutrientes; Adubação foliar

The objective of this work was to evaluate the yield components and physiological quality of soybean seeds, as a function of different doses of cobalt (Co) and molybdenum (Mo) applied foliarly, at two stages of crop development. The experiment was carried out at the Teaching, Research and Extension Farm of the Faculty of Engineering of UNESP – Ilha Solteira College, located in the city of Selvíria, MS. The cultivar TMG 7063 IPRO was used, and the following doses of product based on Co and Mo (0; 0,5; 1,0; 1,5; 2,0 L ha-¹ ). The experimental design used was randomized blocks, in a 4 x 2 + 1 factorial scheme [Doses x application times (stage V4-3) and V4-6) + control], totaling 9 treatments, with four replications. The results obtained allowed to conclude that the foliarly application of Co and Mo did not interfere in soybean crop yield, electrical conductivity, germination percentage, germination speed, emergence speed index, leaf N content and seedling emergence. The quality of soybean seeds was negatively influenced when 2,0 L ha-¹ was applied at stage V4-3, when application occurred at stage V4-6, the observed effect was satisfactory, conferring increase in shoot and root length, increase in the percentage of normal seedlings due to aegd seeds and higher seedling dry mass. No significant differences were found between application times, except for the first count of normal seedlings before storage. Considering the variables analyzed in this work, it is recommended for both stages of soybean development, the application of 1,0 L ha-¹ of Co and Mo foliarly.