Author(s)

Rubia Diana Mantai¹, José Antonio Gonzalez da Silva², Emilio Ghisleni Arenhardt³, Airam Tereza Zago Romcy Sausen¹, Manuel Osório Binello¹, Vidica Bianchi⁴, Dionatas Rodrigues da Silva², Luiz Michel Bandeira²

¹Department of Exact Sciences and Engineering, Regional University of the Northwest of Rio Grande do Sul State, Ijuí, Brazil.
²Department of Agrarian Studies, Regional University of the Northwest of Rio Grande do Sul State, Ijuí, Brazil.
³Department of Crop Plants, Federal University of Rio Grande do Sul, Porto Alegre, Brazil.
⁴Department of Life Sciences, Regional University of the Northwest of Rio Grande do Sul State, Ijuí, Brazil.

The oat panicle components were changed by the forms of nitrogen use influencing productivity. The aim of the study was to determine the direct and indirect effects of oat panicle components on grain yield by N-fertilizer rates in succession systems of high and reduced release of N-residual. The study was conducted in the years 2013 and 2014 in a randomized complete block with four replications in a factorial 3 × 2, for nitrogen rates (30, 60 and 120 kg·ha^-1) and oat cultivars (Barbarasul and Brisasul) the soybean/oat and corn/oat systems. The panicle weight and grain per panicle show greater sensitivity to the change of nitrogen rates. Grain yield was favored by the direct effect of harvest index panicle and indirect by grain weight per panicle. In the system soybean/ oat, the grain weight of panicle shows greater efficiency in promoting positive direct effects on grain yield.

Avena sativa L., Ureia, Relation C/N, Correlation and Path Analysis

Mantai, R. , Silva, J. , Arenhardt, E. , Sausen, A. , Binello, M. , Bianchi, V. , Silva, D. and Bandeira, L. (2016) The Dynamics of Relation Oat Panicle with Grain Yield by Nitrogen. American Journal of Plant Sciences, 7, 17-27. doi: 10.4236/ajps.2016.71003.