Abstract：
As a cost-effective typical co-product of walnut processing; this study aimed to investigate the effects of feeding poor quality, unsaleable walnut kernel, also known as wasted walnut (WW) kernel, on growth performance, carcass characteristics, meat quality and fatty acid (FA) composition of fattening lambs. The experiment was conducted using 24 fattening lambs (27 ±1.07 kg initial BW) assigned to two total mixed concentrate-based diets, over a 80-day experimental period on a completely randomized design. Dietary treatments were: 1) WW (10% WW), and 2) CON (without WW). Average daily and total gain, and final weight increased with WW inclusion (P < 0.05). Also, a significant enhancement in feed conversion ratio (P < 0.05) and carcass cooler shrink loss (P = 0.03) were observed by feeding WW. Dry matter intake (DMI) was not influenced by feeding WW as did carcass prime cuts, meat, bone and fat-tail; however, the backfat thickness was increased (P = 0.01). WW inclusion reduced cholesterol and increased protein load in muscle tissue (P ≤ 0.05). Moreover, this inclusion led to higher concentration of vaccenic acid (VA), conjugated linoleic acid (CLA) and C20 polyunsaturated FAs (PUFA), total n3 and n6 PUFA in muscle and fat-tail (P ≤ 0.05). Due to enhanced animal performance, also chemical and FA composition of muscle and adipose tissue, WW can be included in fattening lamb diets as a rich source of protein and PUFA.
摘要：
作为核桃加工的典型成本效益高的副产品；本研究旨在探讨饲喂质量差的影响，无法销售的核桃仁，也被称为废弃核桃(WW)仁，关于增长绩效，car体特征，育肥羔羊的肉品质和脂肪酸（FA）组成。实验是使用24只育肥羔羊（27±1.07kg初始BW）进行的，这些羔羊被分配到两种总的混合浓缩物饮食中，在完全随机设计的80天实验期间。饮食治疗是：1）WW（10%WW），和2)CON(无WW)。平均日收益和总收益，最终体重随WW含量的增加而增加（P<0.05）。此外，通过饲喂WW观察到饲料转化率（P<0.05）和car体冷却器收缩损失（P=0.03）显着提高。干物质摄入量（dry）不受饲喂WW的影响，car体初切，肉，骨头和脂肪尾巴；然而，背脂肪厚度增加(P=0.01)。WW内含物降低了胆固醇，增加了肌肉组织中的蛋白质负荷（P≤0.05）。此外，这种包含导致更高浓度的疫苗酸（VA），共轭亚油酸（CLA）和C20多不饱和脂肪酸（PUFA），肌肉和脂肪尾部的n3和n6PUFA总量(P≤0.05)。由于增强了动物的性能，还有肌肉和脂肪组织的化学和FA组成，WW可以作为蛋白质和PUFA的丰富来源包括在育肥羔羊日粮中。
