Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
5542993 | Livestock Science | 2017 | 20 Pages |
Abstract
Two experiments were conducted to evaluate the effect of alkaline treatments (20, 40 or 60 g CaO/kg) or water extraction on glucosinolate (GIs) concentration in crambe meal (CM), and to determine effects of replacing soybean meal with CM on intake, digestibility and nitrogen balance in sheep. Twenty-five samples of CM (300 g each) were randomly assigned to one of the following treatments: Control (446 mg GI/kg dry matter (DM)); alkaline treatment (20, 40 or 60 g CaO/kg CM); and water extraction. Alkaline treatment and water extraction of CM did not differ (P > 0.05) in GI concentration. In addition, the level of CaO added (20, 40 or 60 g/kg CM as feed) did not affect (P = 0.47) the GIs concentration. Eight Santa Inês male sheep (25.6 ± 2.6 kg body weight) were distributed to two 4 à 4 Latin squares with four periods of 15 days each (10 days of adaptation and 5 days of sample collection) and received one of the following four different isonitrogenous diets (160 g CP/kg dry matter), formulated by substituting soybean meal: Control (soybean meal); untreated CM; Alkaline-treated CM (40 g CaO/kg); and water extracted CM. Replacing soybean meal with CM did not affect (P > 0.05) feed intake, apparent total-tract digestibility, nitrogen balance and urinary excretion of allantoin. Alkaline treatment or water extraction partially decreased GIs concentration in CM by 46 ± 12% (P < 0.05), but did not affect (P > 0.05) feed intake, apparent total-tract digestibility, nitrogen balance and urinary excretion of allantoin. The processing method (alkaline treatment vs. water extraction) had no effect (P > 0.05) on feed intake, apparent total-tract digestibility, nitrogen balance and urinary excretion of allantoin. Therefore, CM with GIs concentrations under 450 mg/kg DM can be used as substitute for soybean meal as an exclusive protein source in ruminant diets.
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Authors
Daiane Caroline Moura, Tatiane da Silva Fonseca, Suziane Rodrigues Soares, Henrique Melo da Silva, Flavio Junior Gonçalves Vieira, Leonardo Antônio Botini, Adilson de Paula Sinhorin, Ibukun Michael Ogunade, André Soares de Oliveira,