Condutores de sementes: distribuição de sementes de soja em diferentes velocidades de plantio e ângulos do condutor de sementes

• Ano de defesa: 2024
• Autor(a) principal: Bamberg, Darlei München
• Tipo de documento: Dissertação
• Tipo de acesso: Acesso aberto
• Idioma: por
• Instituição de defesa: Universidade Federal de Santa Maria; Brasil; Agronomia; UFSM; Programa de Pós-Graduação em Agricultura de Precisão; Colégio Politécnico da UFSM
• Palavras-chave em Português: Tubos condutores; Distribuição de sementes; Semeadura precisa; Seed tubes; Seed delivery; Precise planting; CNPQ::CIENCIAS AGRARIAS::AGRONOMIA
• Link de acesso: http://repositorio.ufsm.br/handle/1/34073

There are factors that affect a sowing quality. However, it is from the seed meter to the soil that the main part of process takes place for successful planting. The dimensioning of the seed tube is part of good practice and is accompanied by other mechanism adjustments for good performance in a planter. The objective of this work was to evaluate the performance of different sowing speeds, at different angles of the seed conductor tubes, in a high precision planter in soybean crop. The experiment was conducted in the CEPAGRO experimental area (experimental area by University of Passo Fundo) in the town of Passo Fundo, Rio Grande do Sul (RS). The randomized block design method was used, with five treatments, three variables and four replications. The work consisted of the following treatments: increasing the speed of T1 (4 km/h), T2 (5 km h-1), T3 (6 km h-1), T4 (7 km h-1) and T5 (8 km h-1), at different angles of the seed tubes, 38° (control), 43° and 50°. To validate the work, the data was analyzed using the Sisvar application, using the Tukey test at a 5% probability of error for comparison between each treatment and each variable. The average productivity across all speeds using the seed tube with an angle of 50º was the highest soybean yield obtained (4101.4 kg*ha-1) and the control conductor tube with an angle of 38º was the least productive (3941.5kg*ha-1). At all speeds, the 50º angle of the conductor tube presented the best yield averages, except for to the planting speed of 8km/h. In relation to the angles of the seed tube, the larger angle (50º) presented the best yield, especially at lower speeds of 4, 5 and 6 km h-1, which demonstrates the favorable effect on culture performance of more pronounced tube angles in relation to the witness example. However, higher planting speeds counter the result obtained from the conductor tube angle and can reduce the crop's yield potential. The discussion on the effect of parameters associated with planting speed is highlighted, such as the seed exit speed from the metering disc and the mechanical vibration of the row unit, which could be addressed in new research opportunities.