中国畜牧兽医 ›› 2026, Vol. 53 ›› Issue (2): 787-797.doi: 10.16431/j.cnki.1671-7236.2026.02.025

• 营养与饲料 • 上一篇    下一篇

稀土壳糖胺螯合盐对生长育肥猪生长性能、养分消化率、血清指标和粪便菌群结构的影响

罗琪1,2,3(), 龙定彪1,2, 王敬1,2, 肖融1,2, 王琪1,2()   

  1. 1.重庆市畜牧科学院,重庆 402460
    2.生猪技术创新中心(重庆),重庆 402460
    3.西南大学动物科学技术学院,重庆 402460
  • 收稿日期:2025-07-24 出版日期:2026-02-20 发布日期:2026-01-27
  • 通讯作者: 王琪 E-mail:2669645715@qq.com;wangq0418@126.com
  • 作者简介:罗琪,E-mail:2669645715@qq.com
  • 基金资助:
    国家生猪技术创新中心先导科技项目(NCTIP-XD/B04);重庆市现代化农业产业技术体系(CQMAITS202312)

Effects of Rare Earth-chitosan Chelate on Growth Performance, Digestibility of Nutrients, Serum Indices and Fecal Microbiota of Growing-finishing Pigs

LUO Qi1,2,3(), LONG Dingbiao1,2, WANG Jing1,2, XIAO Rong1,2, WANG Qi1,2()   

  1. 1.Chongqing Academy of Animal Science,Chongqing 402460,China
    2.Center of Technology Innovation for Pig (Chongqing),Chongqing 402460,China
    3.College of Animal Science and Technology,Southwest University,Chongqing 402460,China
  • Received:2025-07-24 Online:2026-02-20 Published:2026-01-27
  • Contact: WANG Qi E-mail:2669645715@qq.com;wangq0418@126.com

摘要:

目的 探讨稀土壳糖胺螯合盐(RECC)对生长育肥猪生长性能、养分表观消化率、血清指标及粪便微生物的影响。 方法 选取80头健康、体重接近(56.17 kg±0.05 kg)的“长白×荣昌”二元杂交猪,随机分为2组,每组5个重复,每个重复8头猪(公母各半)。对照组饲喂基础饲粮,试验组饲喂基础饲粮+200 mg/kg RECC。预试期3 d,正试期34 d。于试验开始和结束时空腹称重,记录采食量,并于试验结束当日采集饲料、粪便和血液样本,用于测定生长性能、养分消化率、血清生化、抗氧化指标、激素水平及粪便菌群结构。 结果 与对照组相比,①试验组生长育肥猪的终末体重和平均日增重呈升高趋势,料重比呈降低趋势(0.05≤P<0.10);②试验组生长育肥猪的粗蛋白质表观消化率极显著提高(P<0.01),总磷表观消化率有升高趋势(0.05≤P<0.10);③试验组生长育肥猪的血清生化指标均无显著变化(P>0.05),但血清总抗氧化能力(T-AOC)及谷胱甘肽过氧化物酶(GSH-Px)活性显著提高(P<0.05),丙二醛(MDA)含量显著降低(P<0.05);④试验组生长育肥猪血清胰岛素样生长因子-1(IGF-1)和生长激素(GH)水平极显著提高(P<0.01),四碘甲腺原氨酸(T4)水平显著提高(P<0.05);⑤试验组生长育肥猪粪便菌群香侬(Shannon)指数有升高趋势(0.05≤P<0.10),Beta多样性在空间上与对照组明显分离,螺旋体门的相对丰度显著降低(P<0.05)。 结论 在本试验条件下,饲粮中添加200 mg/kg RECC可提高生长育肥猪的养分消化率、血清抗氧化能力及激素水平,改善肠道菌群结构,对促进生长性能具有积极作用。本试验结果为RECC在猪生产中的应用提供理论依据和实践参考。

关键词: 稀土壳糖胺螯合盐; 生长育肥猪; 生长性能; 养分消化率; 血清指标; 粪便菌群

Abstract:

Objective This study aimed to investigate the effects of dietary supplementation with rare earth-chitosan chelate (RECC) on growth performance, nutrient digestibility, serum parameters, and fecal microbiota in growing-finishing pigs. Method Eighty healthy “Landrace×Rongchang” crossbred pigs with similar body weight (56.17 kg±0.05 kg) were randomly divided into 2 groups with 5 replicates per group and 8 pigs per replicate (half male and half female). The pigs in control group were received a basal diet, while in the experimental group were fed the basal diet supplemented with 200 mg/kg RECC. The trial period included a 3‑day adaptation period and a 34‑day experimental period. Pigs were weighted on an empty stomach at the beginning and end of the experiment, and daily feed intake was recorded. On the final day, feed, fecal, and blood samples were collected to determine growth performance, nutrient digestibility, serum biochemical indices, antioxidant capacity, hormone levels, and fecal microbial composition. Result Compared with control group, ①The final body weight and average daily gain of growing-finishing pigs in experimental group showed a tendency to increase, and the feed-to-gain ratio showed a tendency to reduce (0.05≤P<0.10); ②Apparent digestibility of crude protein of growing-finishing pigs in experimental group was extremely significantly increased (P<0.01), while apparent digestibility of total phosphorus was tended to increase (0.05≤P<0.10); ③Serum biochemical indices of growing-finishing pigs in experimental group had no significant effects (P>0.05), but the serum total antioxidant capacity (T-AOC) and glutathione peroxidase (GSH-Px) activity were significantly increased (P<0.05), and the content of malondialdehyde(MDA)was significantly reduced (P<0.05); ④The levels of serum insulin-like growth factor-1 (IGF-1) and growth hormone(GH) of growing-finishing pigs in experimental group were extremely significantly increased (P<0.01), and the level of tetriodothyronine (T4) was significantly increased (P<0.05); ⑤Shannon index of fecal microbiota of growing-finishing pigs in experimental group was tended to increase (0.05≤P<0.10), Beta diversity showed obvious spatial separation in two treatment groups, and the relative abundance of Spirochaetota at the phylum level was significantly reduced (P<0.05). Conclusion Under the conditions of this study, dietary supplementation with 200 mg/kg RECC improved nutrient digestibility, enhanced serum antioxidant capacity and hormone levels, and modulated the diversity and composition of gut microbiota, thereby promoting the growth and development of growing-finishing pigs. These findings provide a theoretical basis and practical reference for the application of RECC in pig production.

Key words: rare earth-chitosan chelate; growing-finishing pigs; growth performance; digestibility of nutrients; serum indices; fecal microbiota

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