Path analysis between yield components of wheat under different top-dressing nitrogen management
Alan Junior de Pelegrin1, Maicon Nardino2, Mauricio Ferrari3, Ivan Ricardo Carvalho4, Vinicius Jardel Szareski3, Antonio Costa de Oliveira1, Velci Queiróz de Souza5 and Luciano Carlos da Maia1
1 Universidade Federal de Pelotas, Capão do Leão, RS, Brasil
2 Universidade Federal de Viçosa, Viçosa, MG, Brasil
3 SLC Agrícola, Porto Alegre, RS, Brasil
4 Universidade Regional do Noroeste do Estado do Rio Grande do Sul, Ijuí, RS, Brasil
5 Universidade Federal do Pampa, São Gabriel, RS, Brasil
There is little research that addresses associations between the yield of wheat grains and their components in different managements of nitrogen fertilization top dressing. The objective this work linear estimate associations cause and effect between production components and the yield grains in the difference scenarios nitrogen (N) management in top dressing wheat two crops 2012 and 2013. Experimental design was randomized blocks, arranged scheme split-split-plot, with three genotypes × two crops × two source N × four management in top dressing. (3×2×2×4), in the three replications. Linear correlation and path analysis were estimate in the different N management. Management N in top dressing change magnitude linear associations in the wheat. Number fertile tillers independent management in top dressing have positive relation of cause and effect with yield grains in the wheat. Mass grains spike principal in the management II, III and IV prove positive relation cause and effect with yield grains in the wheat.
1. Nitrogen management top dressing changes magnitude of linear association.
2. Number fertile tillers has positive cause relation with yield grains in wheat.
3. Mass of grains of main spike can have positive-causal relation with wheat yield grains depending on the top-dressing management.