妊娠中后期添加酵母培养物对母羊生产性能、产后血清指标及瘤胃发酵参数的影响

doi:10.16431/j.cnki.1671-7236.2026.02.027

Abstract

Abstract:

Objective The aim of this study was to investigate the persistent effects of yeast culture （YC） supplementation during mid-to-late gestation on the productive performance， postpartum serum biochemical indices and rumen fermentation parameters of primiparous ewes. Method Thirty-six healthy Hu sheep weighing （37.72±1.91） kg on the 51st day of gestation were selected for the experiment， and were randomly divided into 2 groups according to the principle of similarity in body weight， with 6 replicates in each group and 3 sheep in each replicate. After 9 days of pre-feeding， the experimental feeding was conducted from gestation day 60 to 150. The ewes in control group （CK group） were fed a total mixed ration， while in experimental group （YC group） were fed the same ration supplemented with 5% YC. After lambing， both groups were fed the same diet as the CK group. On postpartum day 20， blood and rumen fluid samples were collected from the ewes for determination of serum biochemical， immune， and antioxidant indices， as well as rumen fermentation parameters. The production performance of the ewes and lambs was also measured to assess the sustained effects of YC. Result Compared with CK group， ① The birth weight of lambs in YC group was significantly increased （P<0.05）， and the weight of lambs on day 20 was also tended to increase （0.05<P<0.10）； ② The serum cortisol （COR） content of ewes in YC group was extremely significantly increased （P<0.01）， the total protein （TP） content was significantly increased （P<0.05）， and the albumin （ALB） content tended to increase （0.05<P<0.10）； ③ The serum interleukin-2 （IL-2） and tumor necrosis factor-α （TNF-α） contents of ewes in YC group were extremely significantly increased （P<0.01）， and the immunoglobulin G （IgG） content was significantly increased （P<0.05）； ④ In the serum of ewes in YC group， the activity of glutathione peroxidase （GSH-Px） was extremely significantly increased （P<0.01）， the total antioxidant capacity （T-AOC） was significantly increased （P<0.05）， the activity of superoxide dismutase （SOD） showed an increasing trend （0.05<P<0.10）， and the content of malondialdehyde （MDA） showed a decreasing trend （0.05<P<0.10）； ⑤ In the rumen fluid of YC group， the content of microbial protein （MCP） and the concentration of propionic acid showed an increasing trend （0.05<P<0.10）. Conclusion Adding YC in the middle and late stages of pregnancy could improve the production performance of primiparous ewes and improve their immune function and antioxidant capacity.

Key words: primiparous Hu sheep; yeast culture; production performance; serum indices; ruminal fermentation parameters

CLC Number:

S816.7

YANG Zhenxiang, LI Lingui, LI Changchang, MA Wenbin, LIU Yanfeng, YANG Huiguo, WANG Wenqi, LI Changqing. Effect of Adding Yeast Cultures During Mid to Late Gestation on Production Performance， Postpartum Serum Indices and Rumen Fermentation Parameters in Ewes[J]. China Animal Husbandry & Veterinary Medicine, 2026, 53(2): 810-818.

Figures/Tables 6

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Table 6

References 33

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原料 Ingredients	对照组 CK group	试验组 YC group	营养成分 Nutrient components^②	对照组 CK group	试验组 YC group
苜蓿 Alfalfa	20.00	20.00	干物质 DM	92.59	92.54
小麦麦秸 Wheat straw	30.00	30.00	粗灰分 Ash	4.23	4.42
玉米 Corn	33.65	30.29	粗蛋白质 CP	16.88	16.56
酵母培养物 YC	—	5.00	中性洗涤纤维 NDF	40.65	39.96
小麦麸 Wheat bran	3.05	2.74	酸性洗涤纤维 ADF	20.80	20.21
豆粕 Soybean meal	1.00	0.90	粗脂肪 EE	3.25	2.88
棉蛋白 Cotton protein	6.64	5.98	代谢能 ME/（MJ/kg）	13.13	13.05
预混料 Premix^①	3.91	3.51	钙 Ca	1.40	1.34
大豆油 Soybean oil	1.00	0.90	磷 P	0.67	0.65
磷酸氢钙 CaHPO₄	0.75	0.68
合计 Total	100.00	100.00

项目Items	对照组CK group	试验组YC group	P值P-value
母羊初始体重 IBW of ewe/kg	52.87±4.15	53.54±3.98	0.676
母羊终末体重 FBW of ewe/kg	42.23±2.81	44.06±3.20	0.137
母羊产后失重 PWL of ewe/kg	10.64±2.43	9.49±1.87	0.184
羔羊初生重 LBW of lamb/kg	3.23±0.41^b	3.60±0.53^a	0.026
羔羊20日龄体重 BW at 20-day of lamb /kg	5.97±0.35	6.32±0.65	0.052
羔羊平均日增重 ADG of lamb/g	136.64±20.83	136.00±19.36	0.925

项目Items	对照组CK group	试验组YC group	P值P-value
总蛋白TP/（g/L）	60.97±3.57^b	66.74±2.81^a	0.044
白蛋白ALB/（g/L）	27.18±1.34	29.14±1.67	0.091
球蛋白GLB/（g/L）	35.50±5.98	37.60±4.30	0.577
总胆固醇TC/（mmol/L）	1.43±0.11	1.37±0.10	0.507
甘油三酯TG/（mmol/L）	0.60±0.03	0.61±0.02	0.831
高密度脂蛋白HDL/（mmol/L）	0.67±0.05	0.70±0.06	0.560
低密度脂蛋白LDL/（mmol/L）	0.28±0.06	0.33±0.08	0.307
血糖GLU/（mmol/L）	3.50±0.16	3.54±0.15	0.737
β-羟基丁酸BHBA/（mmol/L）	0.56±0.06	0.50±0.07	0.195
皮质醇COR/（ng/ml）	48.06±1.78^A	43.09±1.36^B	0.004

项目Items	对照组CK group	试验组YC group	P值P-value
免疫球蛋白A IgA/（g/L）	1.57±0.09	1.65±0.10	0.284
免疫球蛋白G IgG/（g/L）	19.93±0.55^b	21.70±0.57^a	0.018
免疫球蛋白M IgM/（g/L）	1.30±0.12	1.38±0.08	0.336
白细胞介素-2 IL-2/（pg/mL）	274.04±9.72^A	232.10±11.54^B	0.003
白细胞介素-6 IL-6/（pg/mL）	111.05±2.79	106.65±6.54	0.343
肿瘤坏死因子-α TNF-α/（pg/mL）	41.21±2.48^A	27.24±1.08^B	<0.001

项目Items	对照组CK group	试验组YC group	P值P-value
丙二醛MDA/（nmol/mL）	3.84±0.29	3.37±0.30	0.067
超氧化歧化酶SOD/（U/mL）	84.59±3.49	90.60±3.63	0.054
谷胱甘肽过氧化物酶GSH-Px/（U/mL）	163.68±3.00^B	174.17±2.40^A	0.002
总抗氧化能力T-AOC/（U/mL）	10.75±0.46^b	11.71±0.73^a	0.048

Effect of Adding Yeast Cultures During Mid to Late Gestation on Production Performance， Postpartum Serum Indices and Rumen Fermentation Parameters in Ewes

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项目Items	对照组CK group	试验组YC group	P值P-value
pH	6.67±0.27	6.77±0.19	0.476
氨态氮NH₃-N/（mg/dL）	8.03±1.15	7.24±0.83	0.346
微生物蛋白MCP/（mg/dL）	21.45±1.56	23.67±0.71	0.059
总挥发性脂肪酸T-VFA/（mmol/L）	61.89±3.71	64.56±1.96	0.239
乙酸/（mmol/L）	35.33±2.68	35.80±1.52	0.767
丙酸/（mmol/L）	14.59±1.06	15.92±0.98	0.093
丁酸/（mmol/L）	9.16±1.03	9.93±0.97	0.294
戊酸/（mmol/L）	2.81±0.25	2.90±0.26	0.605
乙酸/丙酸	2.43±0.14	2.26±0.19	0.165

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