Influência da pressão de semeadura na emergência de sementes de soja

Abstract

Different planting forces can significantly influence the uniformity of emergence and initial plant development. Therefore, the objective of this study was to evaluate the emergence of soybean seedlings and the height of these plants subjected to different seeding pressures. Planting DeltaForce (DF) were tested: Automatic Light (AL), Automatic Standard (APA), Automatic Heavy (APE), manual 2 kg (M2), manual 47 kg (M47), manual 101 kg (M101), and manual 165 kg (M165). Seed germination was evaluated from the 5th to the 9th day after planting. At 25 days, plant height was measured using a tape measure, with three plants per plot being evaluated. The results obtained reinforce the importance of selecting the appropriate seeding pressure to maximize initial germination and ensure a uniform stand. In the case of the DeltaForce system, the treatments demonstrated their effectiveness in adapting the planting pressure in real time, contributing to a uniform emergence of plants. The manual application of specific pressures, especially the highest ones (M101 and M165), proved to be equally effective on the 5th day, but with less consistency on subsequent days. DeltaForce technology can provide advantages in seeding pressure management, resulting in rapid and uniform emergence of soybean seeds, which is fundamental to positively influence soybean productivity. The pressures used in sowing showed similar results among them in the emergence of soybean seedlings, with higher values in the first evaluation, corresponding to the fifth day. As for plant height, seeding pressure did not influence, only the evaluation days, with the first evaluation having the highest average.