Awais Muhammad, Sharif Muhammad, Ashfaq Khurram, Aqib Amjad Islam, Saeed Muhammad, Di Cerbo Alessandro, Alagawany Mahmoud
Institute of Animal and Dairy Sciences, University of Agriculture, Faisalabad 38000, Pakistan.
Department of Clinical Medicine and Surgery, University of Agriculture, Faisalabad 38000, Pakistan.
Animals (Basel). 2021 Jun 8;11(6):1713. doi: 10.3390/ani11061713.
A study was carried out to evaluate the effect of single cell protein (SCP) supplement as a protein source on nutrient intake, digestibility, nitrogen balance and in situ digestion kinetics in four buffalo bulls. Four iso-caloric and iso-nitrogenous concentrates containing 3, 6, 9 and 12% of -fermented citrus pulp were formulated. All animals were fed a ration with a concentrate/forage ratio of 50:50. Diets were provided ad libitum twice a day as a total mixed ration in a 4 × 4 Latin Square Design. Each experimental period lasted 3 weeks while the overall study 12 weeks. The first 2 weeks of each experimental period were used as adaptation period while the third week as collection period. Chemical composition of fermented citrus pulp appeared as an excellent source of protein. No significant difference was observed on dry matter intake, digestibility of nutrients and SCP among all the treatments. Moreover, no significant effect was observed on ruminal pH and ammonia nitrogen at different times. Rate of disappearance and lag time of in situ dry matter digestion kinetics remained nonsignificant regardless of SCP percentage. Based on results of similar nutrients intake, nutrient digestibility, and ruminal parameters it is concluded that SCP could be used in the concentrate diet of ruminant up to 12%. Furthermore, the SCP has the potential of an alternative protein source in animal diet formulation.
开展了一项研究，以评估单细胞蛋白（SCP）作为蛋白质来源对四头水牛公牛营养摄入、消化率、氮平衡和原位消化动力学的影响。配制了四种等热量和等氮的精饲料，分别含有3%、6%、9%和12%的发酵柑橘渣。所有动物均饲喂精饲料与粗饲料比例为50:50的日粮。日粮以全混合日粮的形式，按4×4拉丁方设计，每天分两次随意提供。每个试验期持续3周，整个研究持续12周。每个试验期的前2周用作适应期，第3周用作收集期。发酵柑橘渣的化学成分显示是一种优质的蛋白质来源。在所有处理之间，干物质摄入量、养分消化率和SCP均未观察到显著差异。此外，在不同时间，瘤胃pH值和氨氮也未观察到显著影响。无论SCP百分比如何，原位干物质消化动力学的消失速率和滞后时间均无显著差异。基于相似的营养摄入、养分消化率和瘤胃参数结果，得出结论：SCP可用于反刍动物的精饲料中，比例可达12%。此外，SCP在动物日粮配方中具有作为替代蛋白质来源的潜力。
