Influência de diferentes níveis de vigor nas características fisiológicas e de produtividade de soja (Glycine max L.)

Abstract

The use of seeds with high added value, with physical, physiological, and sanitary quality assumes a fundamental role to obtain the full productive potential of soybean (Glycine max L.). High-quality seeds relate to a series of characteristics, among which are the physiological attributes that are germination and vigor. Given this, the study aims to assess the influence of vigor on the physiological and productivity characteristics of soybean plants, still, it will be possible to show the plant population by correcting the germination percentage of each seed batch to 100% germination. For this, the cultivar TMG 7062 IPRO was used, with all the lots presenting 80% in the germination percentage. By the Accelerated Aging test, the cultivar lots were divided into low, medium, and high vigor. The experimental design was in randomized blocks (DBC), with five treatments and four replications. Characteristics such as germination, plant height, dry matter, number of plant knots, the weight of a thousand grains, and final productivity were evaluated. The results showed that seeds from the low, medium, and high vigor lots of TMG 7062 IPRO did not differ significantly in characteristics such as initial plant count, the weight of a thousand seeds, and productivity. Regarding the number of nodes per plant, seeds from the high vigor lot had a higher average value (19.35). The population adjustment, according to the germination test, can better condition indexes in the field, even if the seed has different levels of vigor.