Department of Animal and Poultry Nutrition, Gorgan University of Agricultural Science and Natural Resources, Gorgan, Iran.
Department of Animal Science, Shahid Bahonar University of Kerman, Kerman, Iran.
Vet Med Sci. 2023 Jul;9(4):1771-1780. doi: 10.1002/vms3.1149. Epub 2023 Apr 25.
Oilseeds such as linseed, canola and sunflower contain unsaturated fatty acids that play important functions in the body. The aim of this study was to assess the effects of different levels of processing linseed on growth performance, nutrient digestibility, blood parameters and ruminate behaviour of lambs.
Fifty-six Moghani male lambs (3 months of age, initial average body weight = 28 ± 1.2 kg) were allocated to seven experimental diets in randomized design (eight lambs per each treatment). The experimental diets were as follows: (1) control diet (without linseed), (2) 5% raw linseed, (3) 10% raw linseed, (4) 5% micronized linseed, (5) 10% micronized linseed, (6) 5% extruded linseed and (7) 10% extruded linseed. Lambs were fed ad libitum a basal diet as total mixed ration consisting of 25% concentrate and 75% hay.
The results showed that linseed level and processing method had no significant effect on dry matter intake. Average daily gain, final body weight and feed conversion ratio (FCR) in lambs were affected by experimental diets. The use of 10% micronized linseed and 10% of extruded linseed in the lambs' diet improved dry matter and crude protein digestibility significantly (p < 0.001). Blood glucose concentration observed for lambs fed 10% of micronized or extruded linseed (LS) was not different from that observed in other groups, only from the values shown by lambs fed diets 1 (control) and 2 (5% raw LS). The lowest cholesterol and the highest blood urea nitrogen concentrations were related to lambs fed the control diet (p < 0.001). Feeding processed linseed relative to control diet had no effect on feeding behaviour in lambs.
Results of this research showed that the use of extruded and micronized linseed at the level of 10% can improve FCR, nutrient digestibility, and blood parameters.
亚麻籽、油菜籽和向日葵等油籽含有不饱和脂肪酸，这些脂肪酸在体内发挥着重要作用。本研究旨在评估不同水平加工亚麻籽对羔羊生长性能、养分消化率、血液参数和反刍行为的影响。
将 56 只 Moghani 雄性羔羊（3 月龄，初始平均体重=28±1.2kg）随机分配到 7 种实验日粮中（每种处理 8 只羔羊）。实验日粮如下：（1）对照日粮（不含亚麻籽），（2）5%生亚麻籽，（3）10%生亚麻籽，（4）5%微粉化亚麻籽，（5）10%微粉化亚麻籽，（6）5%挤压亚麻籽和（7）10%挤压亚麻籽。羔羊自由采食基础日粮，基础日粮为全混合日粮，由 25%浓缩料和 75%干草组成。
结果表明，亚麻籽水平和加工方法对干物质采食量没有显著影响。平均日增重、终体重和饲料转化率（FCR）受实验日粮的影响。在羔羊日粮中添加 10%微粉化亚麻籽和 10%挤压亚麻籽显著提高了干物质和粗蛋白消化率（p<0.001）。饲喂 10%微粉化或挤压亚麻籽（LS）的羔羊的血糖浓度与其他组没有差异，仅与饲喂日粮 1（对照）和 2（5%生 LS）的羔羊的血糖浓度有差异。最低的胆固醇和最高的血尿素氮浓度与饲喂对照日粮的羔羊有关（p<0.001）。与对照日粮相比，饲喂加工亚麻籽对羔羊的采食行为没有影响。
本研究结果表明，在 10%的水平下使用挤压和微粉化亚麻籽可以提高 FCR、养分消化率和血液参数。
