Institute of Animal and Dairy Sciences, University of Agriculture Faisalabad, Faisalabad, 38000, Pakistan.
School of Agriculture and Environmental Sciences, University of the Gambia, Serrekunda, Gambia.
Trop Anim Health Prod. 2022 Jul 21;54(4):236. doi: 10.1007/s11250-022-03226-3.
The objective of the study was to evaluate the effect of forage to concentrate ratio (F:C) on growth performance and feeding behavior of Thalli lambs. For this purpose, twenty-one male Thalli lambs with initial live body weight (26.30 ± 3.02 kg) were selected and divided into three experimental groups in a randomized complete block design. The experimental duration was 12 weeks. The experimental diets were F:C (100:0), F:C (80:20), and F:C (60:40). Alfalfa hay was used as forage source. Lambs fed F:C (60:40) and F:C (80:20) diets showed higher dry matter intake (DMI), total dry matter intake (TDMI), organic matter intake (OMI), weight gain, growth rate, better feed conversion ratio, and feed efficiency as compared to the lambs fed F:C (100:0) (P < 0.05). The results also showed that crude protein (CP), ether extract (EE), and total digestible nutrient (TDN) intake were maximum in F:C (60:40)-fed lambs (P < 0.05). However, higher crude fiber (CF), neutral detergent fiber (NDF), and acid detergent fiber (ADF) intakes were seen in the F:C (100:0)-fed lambs (P < 0.05). The results of nutrient digestibilities revealed the improved OM, DM, CP, and ADF digestibilities in lambs fed with F:C (60:40) and F:C (80:20) (P < 0.05). The digestibility of NDF and CF were not affected by the all-dietary treatments (P > 0.05). Behavior results explored that eating time, and chewing time was higher in F:C (100:0)-fed lambs (P < 0.05), while standing time, lying time, and abnormal behavior were increased in lambs fed with F:C (60:40) and F:C (80:20) (P < 0.05). Based on the results, it is concluded that the addition of concentrate at 20% and 40% improves growth performance and increases DMI, TDMI, OMI, and nutrient digestibility. However, standing time, lying time, and abnormal behavior increase by feeding of the 20% and 40% concentrate. Therefore, it is suggested that the concentrate should be supplied in restricted amounts to improve lambs' welfare and normal behavior without influencing their performance.
本研究旨在评估饲料与浓缩物比例（F:C）对塔里羔羊生长性能和采食行为的影响。为此，选择了 21 只初始活体体重（26.30±3.02kg）为 26.30±3.02kg 的雄性塔里羔羊，并采用随机完全区组设计将其分为三个实验组。实验持续时间为 12 周。实验日粮为 F:C（100:0）、F:C（80:20）和 F:C（60:40）。紫花苜蓿干草用作饲料源。与 F:C（100:0）组相比，饲喂 F:C（60:40）和 F:C（80:20）日粮的羔羊表现出更高的干物质采食量（DMI）、总干物质采食量（TDMI）、有机物采食量（OMI）、体重增加、生长速度、更好的饲料转化率和饲料效率（P<0.05）。结果还表明，F:C（60:40）组羔羊的粗蛋白（CP）、乙醚提取物（EE）和总可消化养分（TDN）摄入量最高（P<0.05）。然而，F:C（100:0）组羔羊的粗纤维（CF）、中性洗涤剂纤维（NDF）和酸性洗涤剂纤维（ADF）摄入量较高（P<0.05）。养分消化率的结果表明，F:C（60:40）和 F:C（80:20）组羔羊的 OM、DM、CP 和 ADF 消化率提高（P<0.05）。所有日粮处理对 NDF 和 CF 的消化率没有影响（P>0.05）。行为结果表明，F:C（100:0）组羔羊的采食时间和咀嚼时间较高（P<0.05），而 F:C（60:40）和 F:C（80:20）组羔羊的站立时间、躺卧时间和异常行为增加（P<0.05）。基于这些结果，可以得出结论，添加 20%和 40%的浓缩物可以提高生长性能并增加 DMI、TDMI、OMI 和养分消化率。然而，通过喂食 20%和 40%的浓缩物，站立时间、躺卧时间和异常行为增加。因此，建议以限量的方式提供浓缩物，以提高羔羊的福利和正常行为，而不影响其性能。
