Influência de diferentes épocas de simulação de chuva sobre a germinação na espiga de trigo

Abstract

The objective of this study was to evaluate the influence of different rainfall simulation times on germination in the spike in wheat cultivars. The experiment was conducted in greenhouse in the experimental area of the Federal University of Pampa, Itaqui-RS, using a completely randomized design in a factorial 8x8 (eight times of rainfall artificial simulation and eight cultivars), with three replications. After harvest, the spikes was tested for germination in the spike, first count, germination and standard germination. Data were subjected to variance analysis and subsequent averages comparison, finding interactions between simulation rain and cultivars. For variable germination in the spike was possible to identify the Horizonte and Raízes cultivars as moderately resistant, however, was not observed a time of rainfall simulation that improved germination of grain in the spike for all cultivars. For the first count germination and germination, treatments involving the simulation of rain at fifteen days after physiological maturity and their associations increased germination. Thus, this methodology enabled us to identify Horizonte and Raízes cultivars as moderately resistant to germination in the spike. The treatments with fifteen days of rainfall simulation associations after the physiology maturity were the most critical, affecting the first count of germination and germination cultivars.