Abstract
Abstract: The increase in spray volumes in industrial seed treatments may increase the deterioration and reduce the physiological potential of seeds, especially when stored in unfavorable environments. The aim of this study was to evaluate the effect of spray volumes obtained by the combination of different chemical products, via industrial treatment, on the physiological potential of soybean seeds during storage in different environments. A completely randomized experimental design was used in a 5 × 3 factorial arrangement, with four replications. The factors were five spray volumes (0, 600, 1200, 1800 and 2400 mL.100 kg-1 of seeds), obtained from the combination of different products in commercial use, and three storage periods (0, 60 and 120 days), evaluated separately in two environments (storage without climate control and cold storage). The following variables were evaluated: germination, first germination count, seedling emergence in sand, emergence speed index, seedling length (total, shoot, and root) and dry matter (shoot and root). The physiological potential of soybean seeds is reduced by increasing the spray volume used in the industrial treatment and by prolonging the storage period. However, this effect is mitigated by the controlled conditions of cold storage.
Highlights
Soybean holds the position of the most important crop in Brazilian agribusiness with prominence in planted area, production, and yield (CONAB, 2018)
There was a different response between the environments evaluated: in the environment of cold storage, there was significance in analysis of G, emergence speed index (ESI), SE, shoot length (ShL), and Shoot dry matter (SDM)
A significant effect was found for first germination count (FGC), germination (G), emergence speed index (ESI), seedling emergence in sand (SE), and shoot length (ShL) for both environments
Summary
Soybean holds the position of the most important crop in Brazilian agribusiness with prominence in planted area, production, and yield (CONAB, 2018). This creates the need for investments in research, especially to increase availability of cultivars with high yield potential and of quality seeds (Krzyzanowski et al, 2018). Techniques of production, quality control, storage, and seed treatment have been refined in recent years and have contributed to this rise in the production sector (Krzyzanowski et al, 2018). Due to new technologies linked to seed production, the value of this raw material has increased, with a significant effect on production costs. The seed market has been ever more demanding in regard to high quality seeds that perform their function: becoming adult plants with high vigor and yield (Peske, 2017)
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