Abstract
The objective of this study was to evaluate the performance, consumption and feed conversion of Angus x Nellore heifers fed hydrolyzed sugarcane. Twenty-four (1/2 Angus x Nellore crossbred) heifers were used with average body weight of 242 kg ± 23 kg, confined in individual pens with total area of 15 m 2 . The study consisted of six treatments distributed as follows: T1 – in natura sugarcane: sugarcane was given to animals after being chopped; T2 – hydrolyzed sugarcane with 0.5 % lime and 24 hours of air exposure; T3 – hydrolyzed sugarcane with 0.5 % lime and 48 hours of air exposure; T4 – hydrolyzed sugarcane with 1.0 % lime and 24 hours of air exposure; T5 – hydrolyzed sugarcane with 1.0 % lime and 48 hours of air exposure; T6 – hydrolyzed sugarcane with 1.0 % lime and 72 hours of air exposure. We used a completely randomized design with four replicates per treatment, and averages were compared by Tukey test at 5 % significant level of probability. No statistical difference was found for any of the treatments (P>0.05). The processing of sugarcane with lime did not increase the intake and performance of animals evaluated in this study. KEYWORDS: alkaline treatment; calcium oxide; hydrolysis; nutrition ruminants.
Highlights
A bovinocultura brasileira tem grande importância para o desenvolvimento nacional, visto que, além de ter o papel social de fixar o homem no meio rural, o leite, a carne e seus derivados têm presença marcante no hábito alimentar do brasileiro
heifers were used with average body weight of 242 kg ± 23 kg
The study consisted of six treatments distributed as follows
Summary
FELIPE NOGUEIRA DOMINGUES1, MAURO DAL SECCO OLIVEIRA2, DIEGO AZEVEDO MOTA3, DANIEL DE SOUZA FERREIRA4, JULIANA SANTOS5. Objetivou-se com este estudo avaliar o desempenho, o consumo e a conversão alimentar de novilhas Angus x Nelore alimentadas com cana-de-açúcar hidrolisada. Foram utilizadas 24 novilhas (1/2 sangue Angus x Nelore) com peso corporal médio de 242 kg ± 23 kg, confinadas em baias individuais com área total de 15 m2. O trabalho foi composto por seis tratamentos distribuídos da seguinte forma: T1 – cana in natura: a cana-de-açúcar era fornecida aos animais após picada; T2 – cana hidrolisada com 0,5% cal virgem e 24 horas de exposição ao ar; T3 – cana hidrolisada com 0,5% cal virgem e 48 horas de exposição ao ar; T4 – cana hidrolisada com 1,0% cal virgem e 24 horas de exposição ao ar; T5 – cana hidrolisada com 1,0% cal virgem e 48 horas de exposição ao ar; T6 – cana hidrolisada com 1,0% cal virgem e 72 horas de exposição ao ar. Não foram verificadas diferenças estatísticas em nenhum dos tratamentos (P>0,05). O tratamento da cana-de-açúcar com cal virgem não aumentou o consumo nem o desempenho dos animais avaliados neste trabalho. PALAVRAS-CHAVE: hidrólise; nutrição de ruminantes; óxido de cálcio; tratamento alcalino
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