Padronização de sementes de trigo e a influência na expressão do vigor: caracteres agronômicos e produtividade das plantas

Abstract

The objective of this work was to study the influence of wheat seed classification on the expression of vigor, agronomic traits and plant productivity. The objective of this study was to evaluate the influence of the classification on the expression of vigor, and evaluated the mass of one thousand seeds, hectoliter weight, germination, first germination count, germination speed index, field emergence, emergency speed index, aerial and root length of seedlings, shoot dry mass and seedling root, electrical conductivity, and correlation analysis between physical and physiological characters. It is concluded that there is variability of the physical and physiological attributes against the thickness of the wheat seeds, specific for the effects of cultivar and seed lots. Seeds of wheat with intermediate thickness potentiate the vigor, and seeds with smaller and larger thickness present less vigor. In Chapter II the objective was to evaluate the influence of seed size on the agronomic traits related to the growth of wheat plants, and evaluated the number of fertile tiller, height of insertion of the main plant stem, height of the main plant, height of insertion of the secondary spike, secondary height, where it was possible to conclude that there is a tendency for smaller seeds to result in plants with lower stem plant insertion, main plant height, main plant height, and height of stem insertion. And the plants originating from the oblong hole <2.00 mm provide inferior field performance. The objective of this study was to determine the influence of wheat seed size on grain yield and yield components. The number of spikelets per spike of the main plant, number of spikelets per spike of primary tiller, number of spikelets per spike were evaluated. secondary tillers, number of seeds of primary plant, number of primary tiller seeds, number of secondary tiller seeds, contribution of tiller in productivity, main plant contribution in grain yield, grain yield, thousand seed mass, weight hectoliter and economic analysis. It can be concluded that wheat seed size influences the number of spikelets of the main plant, primary and secondary seed numbers, number of seeds of the main plant, primary and secondary seed, mass of one thousand seeds, hectoliter weight, and productivity that the seeds <2.00 mm resulted in plants with lower yield, seeds from the sieve 2.5 to 2.99 formed plants with higher productivity, being 2.3% greater to the original sample, as well as 2% to more than seeds> 3.0 mm, 2.7% relative to 2.0 to 2.49 mm, and 6% of seeds <2.0 mm.