Effect of heat or formaldehyde treatment on the rumen degradability and intestinal tract apparent digestibility of protein in soya-bean meal and in rapeseed meals of different glucosinolate content |
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| Institution: | 1. Department of Medical Oncology, Leiden University Medical Center, Leiden, The Netherlands;2. Department of Medical Oncology, Erasmus MC Cancer Institute, Rotterdam, The Netherlands;3. Department of Clinical Pharmacy and Toxicology, Leiden University Medical Center, Leiden, The Netherlands;4. Department of Pathology, Leiden University Medical Center, Leiden, The Netherlands;5. Department of Medical Oncology, University of Groningen, University Medical Center Groningen, Groningen, The Netherlands;6. Department of Medical Oncology, Antoni van Leeuwenhoek – Netherlands Cancer Institute, Amsterdam, The Netherlands;1. Animal & Grassland Research & Innovation Centre, Teagasc, Mellows Campus, Athenry, Co. Galway, Ireland;2. School of Veterinary Medicine, University College Dublin, Belfield, Dublin 4, Ireland;3. School of Agriculture and Food Science, University College Dublin, Belfield, Dublin 4, Ireland;1. Department of Neurosurgery, Nanoori Gangnam Hospital, Seoul, Republic of Korea;2. Department of Neurosurgery, Nanoori Suwon Hospital, Suwon, Republic of Korea;3. Department of Neurosurgery, Nanoori Incheon Hospital, Incheon, Republic of Korea;4. Department of Orthopaedic Surgery, Kathmandu Medical College, Kathmandu, Nepal;1. Department of Agricultural and Environmental Sciences, Udine University, Via Sondrio, 2/A, 33100 Udine, Italy;2. Associazione Allevatori del Friuli Venezia Giulia, Codroipo, Udine, Italy;3. Unità Locale Socio Sanitaria, Asolo, Treviso, Italy |
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| Abstract: | Three Hereford × Friesian/Holstein heifers were each fitted with rumen and simple T-piece duodenal cannulae. They were used in an experiment of latin square design to study the rumen degradability and intestinal apparent digestibility (using the mobile dacron bag technique) of protein in soya-bean meal (SBM) and in low and high glucosinolate rapeseed meals (LgsRSM and HgsRSM, respectively) each in untreated (UT), heat treated (HT) and formaldehyde treated (FT) forms. For rumen incubation times of 24 h there were no significant protein source × processing treatment interactions for either degrability of protein in the rumen (dgN) or for the proportion of food protein undegradable in the rumen and digestible in the small intestine (DUDN). At this time dgN values for FT, HT and UT were 0.263, 0.374 and 0.418 (SEM 0.0078; P < 0.001) respectively and DUDN values for SBM, LgsRSM and HgsRSM were 0.320, 0.348 and 0.386 (SEM 0.0078; P < 0.001) respectively. Compared with UT, and to a lesser extent HT, FT at all times after 0 h incubation significantly decreased dgN values and increased DUDN values for all three protein sources. Compared with UT, HT significantly decreased dgN. Apparent digestibility of the protein of SBM in the intestines was greater than that of LgsRSM and HgsRSM, and overall the values of available undegraded protein for FTLgs and HgsRSM, but not of FTSBM, were similar to or greater than for the UT sources. FT tended to decrease the total tract apparent digestibility of the protein sources. |
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