包被氧化锌对断奶仔猪生长性能和腹泻指数的影响

发布时间：2018-03-28 05:30

本文选题：包被氧化锌　切入点：断奶仔猪　出处：《西北农林科技大学》2015年硕士论文

【摘要】：本试验旨在研究以硬脂酸为包膜材料的包被氧化锌在实际生产环境中对断奶仔猪促生长和抗腹泻作用的效果。选用26±2日龄"杜洛克×长白×约克夏(D×L×Y)"三元杂交断奶仔猪96头,断奶重约为7 Kg,随机分为4组(每组3个重复,每个重复8头),设置2个对照组(基础对照组和高锌对照组)和2个试验组,高锌对照组是在基础饲粮里添加3000mg/kg普通氧化锌,试验组分别饲喂添加450和750mg/kg包被氧化锌的试验饲粮。预饲期10天,正饲期14天。结果表明:1)与基础对照组相比,3000 mg/kg普通氧化锌可以显著提高断奶仔猪的生长性能(P0.05)和显著降低腹泻指数(P0.01),但同时粪锌也显著增加(P0.01),其中平均日增重和平均日采食量分别提高了79.04%和31.07%,料肉比降低了26.91%,粪锌含量是基础对照组的20倍之多;2)与基础对照组相比,450mg/kg包被氧化锌可以显著降低腹泻指数(P0.01),但对生长性能没有显著影响(P0.05);3)与基础对照组相比,750mg/kg包被氧化锌可以显著提高断奶仔猪的生长性能(P0.05)和显著降低腹泻指数(P0.01),但与高锌对照组存在很大的差异(P0.05);4)与高锌对照组相比,450和750mg/kg包被氧化锌均可以显著降低粪便中锌的含量(P0.01)。综合考虑各方面的因素,750mg/kg包被氧化锌有替代3000mg/kg普通氧化锌的潜力,而在实际生产环境中要达到既保证断奶仔猪的生长性能又减少环境污染的目的,包被氧化锌的最佳添加量还待进一步验证。
[Abstract]:The purpose of this experiment was to study the effect of zinc oxide coated with stearic acid on growth promotion and diarrhea resistance of weaned piglets in actual production environment. 96 weaned piglets of "Duroc 脳 Landrace 脳 Yorkshire D 脳 L 脳 Y)" were selected as the age of 26 卤2 days. The weaning weight was about 7 kg, and was randomly divided into 4 groups (3 repeats in each group, 8 repeats in each group) and 2 control groups (basic control group and high zinc control group) and two experimental groups. The high zinc control group was fed with 3000mg/kg common zinc oxide in the basal diet. The experimental groups were fed with zinc oxide supplemented with 450 and 750mg/kg respectively. The pre-feeding period was 10 days. The results showed that the growth performance and diarrhea index of weaned piglets could be significantly increased by 3 000 mg/kg ordinary zinc oxide compared with the control group, but the fecal zinc also significantly increased the average daily gain of piglets, while the fecal zinc also significantly increased the growth performance of weaned piglets (P 0.05) and significantly decreased the diarrhea index (P 0.01), while the fecal zinc also significantly increased the average daily gain of piglets. The daily feed intake and average daily intake were increased by 79.04% and 31.07%, respectively, the feed / meat ratio decreased 26.91%, and the fecal zinc content was 20 times as much as that of the basic control group. Compared with the basic control group, zinc oxide coated with 450 mg / kg of zinc oxide significantly decreased the diarrhea index (P 0.01), but had no effect on growth performance. Compared with the control group, 750mg / kg coated zinc oxide significantly increased the growth performance of weaned piglets (P0.05) and significantly reduced the diarrhea index (P0.01C), but there was a great difference between the control group and the control group (P0.05 / kg) compared with the control group with high zinc (450mg / kg) and the control group (450mg / kg). Both 750mg/kg coated zinc oxide and 750mg/kg coated zinc oxide can significantly reduce the content of zinc in feces (P 0.01). Considering all factors, 750mg / kg coated zinc oxide has the potential to replace 3000mg/kg zinc oxide. However, in order to ensure the growth performance of weaning piglets and reduce environmental pollution in the actual production environment, the optimal amount of zinc oxide coated is still to be further verified.
【学位授予单位】：西北农林科技大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：S828.5

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