Cutting system in vegetative stage alters nutritional parameters and aerobic stability of Winter cereals silage

G.F.M. Leão C.C. Jobim M. Neumann A.V.I. Bueno M.G. Ribeiro F.A. Jacovaci E.H. Horst M.R.H. Silva E.J. Askel About the authors

ABSTRACT

The use of cutting regimes in vegetative stage for winter cereals is interesting when it seeks to intensify the forage production for ruminants. However, it is necessary to ascertain the impact of this management on the characteristics of the resulting silage. Thus, the aim of the experiment was to evaluate the nutritional quality and aerobic stability of winter cereal silages submitted to cutting regimes in vegetative stage, before ensiling. The materials used were: wheat (Triticum aestivum cv. BRS Gralha Azul); barley (Hordeum vulgare cv. BRS Brau); white oat (Avena sativa cv. URS Guará); black oat (Avena strigosa cv. Embrapa 139) and triticale (X Triticosecale cv IPR 11); associated with three management strategies: without previous cuts (Only silage), one cut and two cuts in vegetative and posterior silage making. Barley owned low values of ADF (311.7 and 375.3g kg de DM-1) and high TDN (569.2 and 533.4g kg de DM-1) for one and two-cut system, respectively. For aerobic stability, materials were quite stable after opening the silos, with the exception of black and white oat in management without cuts. Triticale and barley silage had the highest nutritional stability with the increase in the number of cuts.

Keywords:
barley; protein; triticale; wheat

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