Recobrimento de sementes de soja de diferentes níveis de qualidade fisiológica com aminoácidos: desempenho de plantas em campo e sementes

Abstract

The objective of this study was to evaluate the effect of the application of amino acids in coating the seeds of different physiological quality on the performance of plants and seeds. For the experiment were used three lots of soybean seeds of different physiological quality of cv BMX Power RR. The treatments consisted involving the combination of two factors, namely, seed lots of three levels of physiological quality and seed coating with product the amino acid based on the doses of 0, 200, 400, 600 and 800 ml of commercial product 100 kg seed-1, a total of 15 treatments. The experimental design was completely randomized experiment 1, and a randomized block experiment 2. In the first experiment evaluated the physiological performance of the coated seeds through germination tests, first count of germination, cold test, accelerated aging and length roots and shoots of seedlings. In the second experiment the coated seeds were sown in pits and rated the performance of individual plants, which at the time of harvest was determined plant height, stem diameter, number of branches per plant, number of pods and seeds per plant, weight a thousand seeds, productivity and physiological seed quality. The physiological seed quality was evaluated by the same variables used in the first experiment. The coating of seeds with amino acids does not promote the physiological performance of seeds and plant performance in the field. high physiological quality seeds perform better in physiological tests performed in the laboratory. The productivity of individual plants of soybean coming from lots of high physiological quality seeds is 15% higher than in plants from plots of reduced physiological seed quality. The effect of high seed quality transmits the seeds produced by the plants originate them, resulting in higher physiological quality seed production.