Crescimento inicial em arroz cultivado e daninho submetidos a diferentes concentrações de ácido salicílico

Abstract

The rice (Oryza sativa L.) is considered one of the main cereals grown around the world. In Brazil occupies a prominent place in grain production, concentrating its production of Rio Grande do Sul State, the main rice producer in Brazil. Rice harmful and the temperature is a major loss in rice crops, and the use of salicylic acid can help to prevent competition between the biotypes. The objective of this study was to evaluate the initial growth of a cultivar of rice and red rice biotype subjected to different concentrations of salicylic acid. The work was conducted on the premises of the Federal University of Pampa, Itaqui campus in 2014, we used a cultivar of rice and also biotype of red rice with the application of salicylic acid. Seeds were soaked in concentrations of zero; 0.01; 0.1; 0.5; 1.0 uM of salicylic acid during the 24 hour period at 25 ° C afterwards BOD camera, later to be sown in pots with a capacity of 0.3 dm³ with peat substrate type and taken to the house vegetation, which were subjected to the following tests: shoot length and root; Dry weight of shoot and root. The exogenous application of salicylic acid in greenhouse conditions was not favorable results for rice grown in relation to the red rice, which has had the highest values in all the variables. The red rice excelled in all variables, this fact may be due to red rice present inert characteristics. It is concluded that salicylic acid can act in different ways to plant and at different doses.