Avaliação do desempenho industrial da cultivar puitá submetida a diferentes doses de herbicidas do grupo da imidalizolinonas

Abstract

To achieve high grain yields in irrigated rice, there is the need to use chemical methods of weed. Herbicide application of imidalizolinonas group is one of the options available on the market. The experiment was conducted in the field, in the municipality of Itaqui / RS in the agricultural year 2012/13. The herbicides and their doses were: Clearfield (Kifix ® - imazapic + imazapyr: the doses 0, 75, 140, 215, 280 and g/ha-¹ Imazethapyr Nortox Plus ® - Imazethapyr: the doses 0, 0.5, 1.5, 1.5 and 2 L/ha-¹). Cultivar Puita INTA CL was sown in minimum tillage system, the density of 100 kg ha-¹. The objective of the study was to evaluate the effect of herbicides from the group of imidalizolinonas and different doses of the same, the components of income and on the quality of the grain industry. We evaluated the grain yield, number of panicles per m², panicle length in cm, number of grains per panicle, grain weight in grams and industrial income bran, grains esbramados, polished, whole, and broken and incidence defects. The results showed that there was no significant response in the different doses of the herbicides used in the experiment. This indicates that the different doses used did not affect the yield and quality of the variety used. As the applications were realized in the early stage of culture, before the flood of tillage, and application of nitrogen, herbicide application did not influence the performance of the cultivar or with the application of double the recommended dose, this was probably due to rice cultivation present a great recovery potential injury emerged in the initial phase.