Sayed Farghaly Mohamed, Abd Elbaset Ebrahem Elham, Eid Mohamed Mahmoud Adel
Pak J Biol Sci. 2018 Jan;21(6):307-313. doi: 10.3923/pjbs.2018.307.313.
Olive by-products could be a suitable alternative feedstuffs ingredient in ruminants rations. This study was carried out to evaluate effects of replacing clover hay by olive cake with or without addition of poly ethylene glycol in growing lambs ration.
Thirty five Barki lambs averaged 34 kg body weight and 5 months old were divided into 5 groups (7 animals of each) according to live weight for 90 days feeding trial. Olive cake was treated mechanically by hummer mill, screened to produce screening olive cake (treated olive cake, TOC).
Data of dry matter and organic matter digestibility were decreased with ration containing 20% TOC from ration or 67% from clover hay comparing with others. No significant differences were observed among groups in crude protein digestibility. Total digestible nutrients (TDN) as an energy measurement for the experimental rations cleared that replacing process of clover hay by TOC up to 20% of DM intake or 67% of clover hay, given lower values (65.32 and 66.80%). The rumen pH values were not affected by the different experimental rations including control. The highest rumen NH3 was recorded with lambs fed ration containing 33% TOC without PEG instead of clover hay, while the lowest values was recorded with that group fed ration containing 33% TOC with PEG. No significant differences were detected in total gain, ADG as well as feed efficiency among the experimental rations. Dry matter intake slightly increased with feeding growing lambs on TOC containing rations except R5 compared to the control group.
Summing up partially de-stoned olive cake by screening could be used in replacing clover hay for growing lamb rations, at inclusion levels up to 33 and 67% with or without poly ethylene glycol, with no adverse on performance of growing lambs.
橄榄副产品可能是反刍动物日粮中合适的替代饲料成分。本研究旨在评估在生长羔羊日粮中用橄榄饼替代三叶草干草并添加或不添加聚乙二醇的效果。
将35只平均体重34千克、5月龄的巴尔基羔羊按体重分为5组（每组7只），进行为期90天的饲养试验。橄榄饼用锤式粉碎机进行机械处理，筛选后得到筛选橄榄饼（处理橄榄饼，TOC）。
与其他日粮相比，含有20% TOC的日粮或67%三叶草干草的日粮中干物质和有机物消化率数据降低。各组粗蛋白消化率无显著差异。作为实验日粮能量衡量指标的总可消化养分（TDN）表明，用TOC替代三叶草干草，替代量高达干物质摄入量的20%或三叶草干草的67%时，TDN值较低（65.32%和66.80%）。瘤胃pH值不受包括对照组在内的不同实验日粮的影响。饲喂不含聚乙二醇、含33% TOC替代三叶草干草日粮的羔羊瘤胃氨含量最高，而饲喂含聚乙二醇、含33% TOC日粮的羔羊瘤胃氨含量最低。各实验日粮在总增重、平均日增重以及饲料效率方面均未检测到显著差异。与对照组相比，除R5外，用含TOC的日粮饲喂生长羔羊时干物质摄入量略有增加。
综上所述，通过筛选得到的部分去石橄榄饼可用于替代生长羔羊日粮中的三叶草干草，添加或不添加聚乙二醇时的添加水平分别可达33%和67%，且对生长羔羊的性能无不利影响。
