Valor nutritivo da silagem de cana-de-açúcar tratada com uréia e acrescida de rolão-de-milho

Abstract

Resumo O objetivo deste trabalho foi determinar o valor nutritivo da silagem de cana-de-açúcar tratada com 0,5% de uréia e acrescida de 0, 40, 80 e 120 kg de rolão-de-milho/t de cana-de-açúcar picada e ensilada. O experimento foi desenvolvido no Instituto de Zootecnia, em Nova Odessa, SP, em delineamento de blocos completos ao acaso com quatro repetições. O teste de consumo e digestibilidade foi efetuado com ovelhas em gaiolas com coletor e separador de fezes e urina. O teste constou de três períodos de 10, 10 e 5 dias, que corresponderam, respectivamente, aos períodos de adaptação, controle do consumo e coleta. A adição de rolão-de-milho melhorou o padrão de fermentação das silagens. O consumo de matéria seca e fibra insolúvel em detergente neutro, os coeficientes de digestibilidade da matéria seca e fibra insolúvel em detergente neutro, bem como a ingestão de nutrientes digestíveis totais, aumentaram linearmente com a elevação dos níveis de rolão-de-milho adicionados. O valor nutritivo das silagens aumentou com a adição de rolão-de-milho.Termos para indexação: produtos fermentados, digestibilidade, alimentação animal, ovinos. Nutritive value of sugarcane silage treated with urea and added ground corn earsAbstract The objective of this work was to determine the nutritive value of the silage of sugarcane treated with 0.5% of urea plus 0, 40, 80 and 120 kg of ground corn ears/ton of chopped sugarcane conserved as silage. The experiment was developed at Instituto de Zootecnia, in Nova Odessa, SP, Brazil, according to a randomized complete blocks design, with four replications. Intake and digestibility trials were made in 10, 10 and 5 day periods, corresponding to adaptation, intake and collection periods, respectively, with female sheep. The addition of ground corn ears improved fermentation pattern of the silages. The silage nutritive value measured as dry matter and neutral detergent fiber intake, dry matter and neutral detergent fiber digestibility coefficients and total digestible nutrients intake increased linearly with levels of ground corn ears.

Mixed sugarcane and elephant grass silages with or without bacterial inoculant

“…These results were predictable because of the higher yeast concentration in the silages with greater sugarcane proportions, as reported previously. The ethanol values of sugarcane silage alone were similar to those reported by other authors, with values ranging from 69 to 80 g/kg (Andrade et al, 2001;Bernardes et al, 2007;Pedroso et al, 2007). Losses through gases are very important at sugarcane silage because they are highly correlated to the ethanol content (903 g/kg) and to the dry matter recovery (893 g/kg) (Pedroso et al, 2007).…”

Chemical and microbiological characteristics of sugar cane silages treated with microbial inoculants

“…According to the tested contrasts, inoculation with these bacteria increased the final acetic acid concentration of the silages, so that the highest values were observed for the silages inoculated with L. brevis compared to those inoculated with L. buchneri. In the present study, the acetic acid concentrations in the silages inoculated with heterofermentative bacteria were equal to those found by Freitas et al (2006), who reported values between 2.6 and 4.5%, that were higher than those reported by Andrade et al (2001) and Pedroso et al (2007) who obtained values varying between 0.9 and 2.2% and of 1.93 to 2.9% for sugar cane with different additives.…”

“…Values between 1.5 and 4.3% of this acid in the DM can be found in the literature (Alli et al, 1983;Alcântara et al, 1989;Andrade et al, 2001;Freitas et al, 2006). Pedroso et al (2007) reported values of 5.2 a 7.6 for sugar cane silages with different additives.…”

Consumo e desempenho de ovinos alimentados com silagens de cana-de-açúcar tratadas com óxido de cálcio e cloreto de sódio

“…Para este tratamento, possivelmente houve maior digestibilidade aparente da MS, o que resulta em maior consumo, como descrito por Andrade et al (2001). Segundo Restle et al (2000), o maior consumo de MS associado à alta concentração energética das dietas implica aumento no consumo de ED.…”