Melendez Pedro, Ramirez Romina, Marin María P, Duchens Mario, Pinedo Pablo
College of Veterinary Medicine, University of Georgia, Tifton, GA, 31793, USA.
College of Veterinary Medicine, University Santo Tomás, Viña del Mar, Chile.
Anim Nutr. 2020 Mar;6(1):47-53. doi: 10.1016/j.aninu.2019.11.008. Epub 2019 Dec 31.
The objective of this study was to compare the effect of linseed and canola expeller on average daily weight gain (ADG), concentrate intakes, incidence of diarrhea, serum haptoglobin, interleukin (IL)-1, and resolvin-E1 in female Holstein calves from birth to weaning. A sample size of 20 calves per group was calculated and were randomly allocated at the time of birth. Linseed group (LIN) was fed a starter with linseed expeller, while canola group (CAN) received a similar concentrate, but with canola expeller. Both expellers were included at a rate of 25% dry matter (DM) basis of the starter. Pasteurized waste milk was fed twice a day until weaning. Calves were weighed at birth, 30, and 60 d of age. Starter intake was evaluated daily from 5 to 60 d. A blood sample was obtained at birth, 14, 28, 35, and 49 d of age, and bovine serum resolvin-E1, haptoglobin, and IL-1 were assayed by commercial enzyme-linked immunosorbent assay (ELISA) kits. Incidence of diarrhea and the duration of the events were also recorded. The effect of the interaction group by time on body weight (BW) and starter intake was not significant ( > 0.05). Average daily gains (ADG) from 0 to 60 d for CAN and LIN groups were 0.680 and 0.675 kg/d ( > 0.05), respectively. Incidences of diarrhea were 25% and 45% for CAN and LIN groups, respectively ( = 0.18). LIN group had greater concentrations of IL-1 at d 21, haptoglobin at d 7, and resolving-E1 at d 14 and 49 than CAN group, respectively. It is concluded that BW at weaning, ADG, and concentrate intakes were not different between groups fed starters containing linseed or canola expeller (25% inclusion). The concentrations of cytokines and haptoglobin were the greatest in LIN group.
本研究的目的是比较亚麻籽粕和油菜籽粕对雌性荷斯坦犊牛从出生到断奶期间平均日增重（ADG）、精料采食量、腹泻发病率、血清触珠蛋白、白细胞介素（IL）-1和消退素-E1的影响。计算得出每组20头犊牛的样本量，并在出生时随机分配。亚麻籽组（LIN）饲喂含亚麻籽粕的开食料，而油菜籽组（CAN）接受类似的精料，但含有油菜籽粕。两种粕类均以开食料干物质（DM）基础的25%比例添加。在断奶前，每天两次饲喂巴氏杀菌的废乳。在犊牛出生时、30日龄和60日龄时称重。从5日龄到60日龄每天评估开食料采食量。在出生时、14日龄、28日龄、35日龄和49日龄采集血样，使用商用酶联免疫吸附测定（ELISA）试剂盒检测牛血清消退素-E1、触珠蛋白和IL-1。记录腹泻发病率和发病持续时间。交互作用组随时间对体重（BW）和开食料采食量的影响不显著（P>0.05）。CAN组和LIN组从0到60日龄的平均日增重（ADG）分别为0.680和0.675千克/天（P>0.05）。CAN组和LIN组的腹泻发病率分别为25%和45%（P=0.18）。LIN组在21日龄时IL-1浓度更高，在7日龄时触珠蛋白浓度更高，在14日龄和49日龄时消退素-E1浓度分别高于CAN组。得出的结论是，饲喂含亚麻籽粕或油菜籽粕（添加量25%）开食料的各组之间，断奶时的体重、ADG和精料采食量没有差异。LIN组细胞因子和触珠蛋白的浓度最高。
