Abstract

The objective of the two studies was to evaluate t effects of feeding on lactating Awassi ewes (study 1) and lambs (study 2), fed on a diet of Atriplex halimus L. (ATR) or olive cake (OC), as a foraging source substitute for wheat straw. In study 1, 33 newly lambed ewes and their lambs were randomly assigned one of three diets: The control diet (CON), 250 g/kg of OC, or 250 g/kg of ATR dry matter (DM). Ewes and lambs were housed in individual pens. Ewes fed CON diet had greater DM, neutral detergent fibre, and acid detergent fibre intakes than OC and ATR groups. Ether extract (EE) intake was greater (p < .0001) in OC diet compared to CON and ATR diets. Milk yield was similar (p = .99) among treatments. Content of milk total solids and fat were greater in ATR diet than CON and OC diets. Milk production cost was lower in the OC and ATR compared to the CON group. In study 2, 18 ewe lambs were assigned the same diets used in study 1 to evaluate the effects of OC and ATR on nutrient digestibility and N balance. Dry matter digestibility was greater in ATR compared to CON and OC groups. The digestibility of EE was greater in the OC group than in CON and ATR groups. Results showed that the inclusion of OC and ATR did not negatively impact lactation performance. Additionally, results proved the economic value of using such products, as they reduced the cost of milk production.

• Highlights

• Olive cake and Atriplex halimus L. were fed to Awassi ewes at a level of 250 g/kg of dietary DM.

• The inclusion of olive cake and A. halimus L. at 250 g/kg of dietary DM, as a source of fibre, did not negatively impact the lactation performance of sheep.

• Additionally, results proved the economic value of using such products, as they reduced the cost of milk production.

摘要

两项研究的目的是评估饲喂Atriplex halimus L.（ATR）或橄榄饼（OC）的饲喂饲喂哺养的Awassi母羊（研究1）和羔羊（研究2）的饲料效果。麦草的来源替代品。在研究1中，将33头新羔羊母羊及其羔羊随机分配为以下三种饮食之一：对照饮食（CON），250 g / kg OC或250 g / kg ATR干物质（DM）。母羊和小羊放在单独的围栏中。与OC和ATR组相比，饲喂CON日粮的母羊的DM，中性洗涤剂纤维和酸性洗涤剂纤维的摄入量更高。与CON和ATR饮食相比，OC饮食中的乙醚提取物（EE）摄入量更大（p <.0001）。牛奶产量相似（p= .99）。ATR日粮中的牛奶总固体和脂肪含量高于CON和OC日粮。与CON组相比，OC和ATR的牛奶生产成本更低。在研究2中，为18只母羊羔羊分配了与研究1相同的日粮，以评估OC和ATR对养分消化率和氮平衡的影响。与CON和OC组相比，ATR中的干物质消化率更高。OC组的EE消化率高于CON组和ATR组。结果表明，加入OC和ATR不会对泌乳性能产生负面影响。此外，结果证明了使用此类产品的经济价值，因为它们降低了牛奶的生产成本。

• 强调

• 以250 g / kg的日粮DM水平将橄榄饼和Atriplex halimus L.喂入Awassi母羊。

• 日粮DM中含有250 g / kg的橄榄饼和halimus L.作为纤维的来源，不会对绵羊的泌乳性能产生负面影响。

• 此外，结果证明了使用此类产品的经济价值，因为它们降低了牛奶的生产成本。