Resumo

BALLESTEROS RODRIGUEZ, Elia et al. Fractionation of nitrogen recovery efficiency and protein concentration in triticale (xTriticosecale Wittmack). Rev. Mex. Cienc. Agríc [online]. 2016, vol.7, n.3, pp.585-598. ISSN 2007-0934.

The recovery efficiency of nitrogen fertilizer is affected by the timing and the mood in which the nitrogen is distributed in crops. The aim of this study was to determine the recovery efficiency of nitrogen (ERN), applied to the soil in installments in three phenological stages of the crop, triticale (xTriticosecale Wittmack). Two experiments in the field (E1 and E2) at different sites of the State of Mexico were conducted during 2013. The treatments consisted of application of fractional doses of 0,150 and 250 kg ha-1 nitrogen for three phenological stages of the crop: tillering, terminal spikelet and leaf flag. The experimental design was randomized complete block design with three replications. The nitrogen content in grain, biomass, and the percentage of protein nitrogen recovered by cultivation quantitated. The grain ERN in E1 was 34.5% between 29 and while for E2, values between 13 and 36% were obtained. In the E1 no differences were observed by the fractionation of N applied in treatments and among cultivars; E2, differences between cultivars were observed. Triticale showed 0.5% nitrogen in the aerial part for E1 and E2 1.2% for grain a value of 1.8% was achieved for both experiments. Fractionation of nitrogen fertilization did not affect the parameters of nitrogen concentration in tissues, or ERN, even in applications in the flag leaf stage.

Palavras-chave : xTriticosecale Wittmack; biomass; grain.

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