Roda compactadora da semeadora adubadora na emergência da soja

Abstract

Fertilizer spreaders are fundamental for the implementation of annual crops since they provide adequate plant arrangement and satisfactory operational capacity. With this, the seeding operation can provide adequate conditions for germination when the fertilizer spreader is properly adjusted for the different soil conditions. The compacting wheels have the function of helping to close the furrow and increase soil contact with the seed. The objective of this research was to evaluate the emergence of soy plants, the mobilized soil area, and blistering when using different compactor wheel angles and pressures. Also, the objective was to evaluate the use of the soil compaction system in the sowing furrow. The work was carried out in the municipality of Porto Mauá - RS with a randomized block design, with 5 different combinations of pressure and compactor wheel angle. The results indicate that the configurations of angle and pressure of the compactor wheel have no interference in the emergence velocity index (EVI), in the emergence speed (VE) and in the final soybean plant stand in favorable soil humidity conditions. For the blistering it was possible to identify that lower rates were obtained when using less horizontal opening angle of the compacting wheels and higher compaction pressure. The use of the compacting wheels presented an increase in the LCI.