Abstract
The displacement velocity of the tractor-seeder set, associated with the furrowing mechanism, influences the plant distribution and the establishment of a correct plant stand in the field. The objective of this study was to evaluate the operational performance of a seeder-fertilizer in the non-tillage sunflower crop, according to sowing speeds and furrow mechanisms. The experimental design used was the randomized blocks, with treatments arranged in a split-plot scheme, where the plots were the furrowing mechanisms (chisel openers and double disk) and the subplots were the sowing speeds (3.2; 4.6; 6.2 and 7.0km h-1), with three replicates. The following were determined in this study: the emergence speed index, the emergence in the field, the average distance between the plants, plant height, plant population and the longitudinal distribution of plants. Sunflower sowing using a chisel openers provides greater emergence in the field, emergence speed index and, consequently, greater plant population. Sowing speed ranging from 3.2 to 7.0km h-1 do not influence field emergence, emergence speed index, height and population of sunflower plants.
Highlights
Several factors affect the performance of sunflower with high productive potential, such as the sowing time, the cultivar, the adequate management of soil fertility and environmental conditions, such as the uniform water distribution over the crop cycle (BEZERRA et al, 2014).Sowing is a fundamental operation for the crop establishment in the field as it is associated with the uniformity of longitudinal distribution of plants and the final stand (ARCOVERDE et al, 2017)
The furrowing mechanisms must be studied in different edaphoclimatic and operational conditions, as the efficiency of such mechanisms depends on factors such as type of soil, depth of sowing and fertilization, sowing speed, soil water content and soil tillage (FURLANI et al, 2013)
Considering the little information related to the performance of seeder-fertilizer machines in the sunflower crop under different operating conditions, the objective of this study was to evaluate the operational performance of a seeder-fertilizer machine in sunflower growing in non-tillage system as a function of four sowing velocities and two furrowing mechanisms
Summary
Several factors affect the performance of sunflower with high productive potential, such as the sowing time, the cultivar, the adequate management of soil fertility and environmental conditions, such as the uniform water distribution over the crop cycle (BEZERRA et al, 2014).Sowing is a fundamental operation for the crop establishment in the field as it is associated with the uniformity of longitudinal distribution of plants and the final stand (ARCOVERDE et al, 2017). Several factors affect the performance of sunflower with high productive potential, such as the sowing time, the cultivar, the adequate management of soil fertility and environmental conditions, such as the uniform water distribution over the crop cycle (BEZERRA et al, 2014). The action of the furrowing mechanisms, in addition to minimizing the demand for traction power and promotion of an adequate soil mobilization improve seed germination, seedling emergence and crop productivity (FURLANI et al, 2013). The furrowing mechanisms must be studied in different edaphoclimatic and operational conditions, as the efficiency of such mechanisms depends on factors such as type of soil, depth of sowing and fertilization, sowing speed, soil water content and soil tillage (FURLANI et al, 2013)
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
