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The objective of this study was to evaluate the effect of three vegetative stage cuts schemes (Without cut; one cut and two cuts), production and nutritional aspects of five winter cereals, harvested for silage production. Cereals used were the wheat (Triticum aestivum cv. BRS Blue Jay), barley (Hordeum vulgare CV. BRS Brau), oats (Avena sativa cv URS Guará), black oats (Avena strigosa cv. Embrapa 139) and triticale (X Triticosecale cv. IPR 11). For the mass of total dry forage, the increase in the number of cuts generated reduction in production for all cereals. The triticale presented the greatest productive stability, since there were no differences (P > 0.05) for the blunt (12,317 kg DM/ha) and with a cut (11,944 kg DM/ha). The scheme of cuts influenced the morphological components, because there was a reduction of the culm and leaf percentages and increased the percentage of cob and the amount of senescent leaves towards the leaves. The TDN levels were not influenced negatively by cutting regimes, with the exception of white oats. For cereals, barley evaluated presented minor values (P < 0.05) of ADF (333.5; 359.2 and 314.2 g/kg DM) and higher values of TDN at the time, independent of the silage cutting regime. Triticale can be used in a vegetative stage and silage production. [ABSTRACT FROM AUTHOR]

The objective was to evaluate the productive, nutritional and bioeconomic aspects of six corn hybrids for silage: SG 6030 YG, LG 6036 PRO, LG 6038 PRO, BRAS 3010, PL 6880 and PL 1335. Regarding the productive aspect, there was a significant difference (p<0.05) between the materials, and the SG 6030 YG, LG 6036 PRO, LG 6038 PRO hybrids, had the highest dry biomass (29,457; 28,089 and 25,609 kg ha-1, respectively) and grains production (12,360; 11,426 and 11,405 kg ha-1, respectively). It can be seen, from the nutritional aspect that there were no statistical difference (p>0.05) among the silages of the hybrids evaluated for MM values, CP, ADF, HEM and TDN having averaged 1.78%, 6.03% , 28.86%, 27.11% and 67.42% DM, respectively. However, NDF values were lower for the LG 6038 PRO hybrids, SG 6030 YG and PL 6880 (54.92%, 54.13% and 54.04%, respectively). The hybrids which obtained the highest yields (LG 6038 and LG 6036 PRO PRO) also showed better bioeconomic results, with costs of R$ 48.56 and R$ 48.80 per ton of NM, respectively. Thus, the LG 6038 PRO, PRO LG 6036 and SG 6030 YG hybrid are recommended for silage in the central-southern region of Paraná. [ABSTRACT FROM AUTHOR]