Nutritive Value of Five Sorghum Hybrids (Sorghum bicolor (L.) Moench) Silages under Increasing Fertilization Levels

[摘要] - The nutritive value of five sorghum hybrids (AG-2002, AG-2005E, AG-X202, AG-X213 and AG-X215) silages, cultivated under increasing fertilization levels (control, 0.5, 1.0, and 2.0 times of the recommended fertilization, corresponding to 0, 45.5, 91, and 182 kg/ha N; 0, 49, 98, and 196 kg/ha de P2O5; and 0, 14, 28, and 56 kg/ha de K2O, besides of 0, 42, 84, and 168 kg/ha S, respectively, that came from the used ammonia sulfate). A complete randomized block design in a factorial 5x4 arrangement (five hybrids and four fertilization levels) with four replicates was used. The seeding time was at 11.06.1997 and plots were harvested at the soft dough stage of grain. From each plot, a sample was collected to fill up the experimental silos, which were opened after 60 days and sampled again to determine the pre drying weight and the nutritive value (CP, fiber fractions and IVDMD). Data were interpreted by means of analysis of variance and regression. The hybrid x fertilizer interaction was unrolled independently of its significance. The qualitative factor means were compared by Tu

[学科分类] 兽医学

[关键词] fertilization;nutritive value;silage;sorghum     IntroduçãoO uso de forragens conservadas na forma de silagem está se tornando cada vez mais comum;principalmente entre os produtores de leite;como uma alternativa para amenizar o problema de escassez de pasto no período de estiagem (Pereira et al