Produtividade do milho em função de três mecanismos de transmissão no disco dosador de sementes em duas profundidades de semeadura

• Autor(a) principal: Berchieri, João Pedro de Oliveira
• 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/11449/214927
• topic: Milho; Semeadura; Engenharia agronômica

To supply the large-scale cultivation of corn, it is necessary to use technologies that are aimed at increasing productivity in crops. The objective was to evaluate the corn productivity components as a function of three transmission mechanisms in the seed metering and two sowing depths. The present work was developed in the experimental area of the Teaching, Research and Extension Farm of the College of Agricultural and Veterinary Sciences, Jaboticabal - SP. The experimental design was in randomized blocks in subdivided plots, with two plots and three subplots and five repetitions. The treatments consisted of two seeding depth adjustments, PS1 (7 cm) and PS2 (5 cm) and three transmission mechanisms that drive the seed metering disc (subplots), MT1 (Encapsulated chain), MT2 (Eliot cable), MT3 (Soretto cable). The corn yield components were evaluated. Regarding sowing depth, there was statistical variation, and sowing depth 1 presented a reduction in the emergence speed index, a reduction of 16.27% in relation to sowing depth 2. It is observed that only at seeding depth 1 (7 cm) there was significance and drive mechanism 2 (Elliot cable) presented higher grain yield. The sowing depths did not influence the corn productivity components, except for the initial and final plant population, average number of days for the emergence of corn seedlings and seed depth. The highest corn yield was obtained at 7 cm seed depth (PS 1) with the Elliot handle (MT 2) in the drive mechanism.