Usability of whey powder as an alternative protein source in ruminant nutrition
Makaleler > Tam Makale · 2022
Yazarlar: Reza Yousefi, Akbar Taghizadeh, Hamid Paya, Ali Hossein-Khani, Valiollah PALANGI, Soheila Abachi, Shahram Shirmohammadi, Maghsoud Besharati
CLEAN TECHNOLOGIES AND ENVIRONMENTAL POLICY, SCI Expanded İndekslerine Giren Dergi, Uluslararası, Wos, 2022, cilt 24, ss 2967-2974
DOI: 10.1007/s10098-022-02363-5
Özet
Remaining agricultural and food waste in the environment without use can cause environmental pollution. However, some of these agricultural wastes can be identified and used as feedstuff in ruminants, which in addition to preventing environmental pollution can reduce the cost of animal feed. The present study was performed to evaluate the nutritional value of whey powder as one of the agricultural wastes in ruminant nutrition. This study has investigated the effect of various heat treatments on the nutritional value of whey powder using an in vitro gas production method. Various heat treatments were tested in this study: (1) dry heating (60 and 120 degrees C for 10 min), (2) warming for 10 min at 100 degrees C, and (3) microwave thermal processing (3, 5, and 7 min). The protein fragmentation system of Cornell University was used to determine sections A, B, and C. According to our results, there were significant differences in the production of various treatments at different hours of incubation and different protein sections at different hours (P < 0.05). Protein degradation analyses showed that heat treatments have statistically significant effects on the degradability. The highest percentage of microbial protein and non-protein nitrogen were associated with microwave heating of 60 degrees C and 7 min treatment. Treated whey had lower amounts of part A and higher quantities of part B fractions. Thus, according to protein fractionation calculations, there was a significant difference between treatments. Dry matter was highest in dry heat-treated samples followed by microwave-treated ones (7 min). High-pressure heat had insignificant effect on dry matter. Net energy for lactation (NEl) and metabolizable energy (ME) were different in the treatment. Our observations are a confirmation of the fact that ruminant feed could be supplemented with heat-treated whey powder as a cost-effective source of energy and protein thus improving fermentation and energy production in the animals.[GRAPHICS].