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猪用中草药添加剂组方及应用效果的研究
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摘要
本研究根据中医理论和养猪的实际情况及各不同生长时期的特点,采取基础方酌加减的方法进行中草药组方,研制开发了猪三个阶段(小猪、中猪和大猪)的中草药饲料添加剂。通过饲养试验、屠宰试验和肉质分析检验其应用效果。
     选用20Kg左右的“杜长大”三元杂交猪72头,随机分成负对照组、试验组、正对照组三组,每组24头,3个重复,每个重复8头。分别进行饲养试验,屠宰试验和肉品质分析试验。试验结果表明:
     (1)猪在20~30kg阶段,试验组、正对照组的日增重,分别比负对照组提高了9.57%(P<0.05)、和5.98%(P<0.05)。料重比分别降低了4.97%、1.10%。试验组供试猪未发生腹泻,正对照组猪的腹泻率,较负对照组降低了93.64%(P<0.01)。在30~70kg阶段,三组之间的日增重差异不显著(P>0.05)。但料重比,分别比负对照组降低了8.76%、5.52%。在70~110kg阶段,试验组、正对照组的日增重,分别比负对照组提高了13.76%(P<0.05)和12.74%(P<0.05)。料重比分别比负对照组降低了11.43%、7.01%。在20~110kg的全程饲养试验中,试验组、正对照组的日增重,分别比负对照组提高了8.60%(P<0.05)和7.19%(P<0.05)。料重比分别比负对照组降低了14.12%和10.58%。
     (2)猪体重110kg左右屠宰时,三个组的屠宰率差异不显著(P>0.05)。瘦肉率试验组比正对照组和负对照组分别提高了3.22%(P<0.05)和3.33%(P<0.05)。脂肪率:试验组分别比正对照组和负对照组降低了33.72%(P<0.05)和38.35%(P<0.05)。眼肌面积:试验组、正对照组分别比负对照组增加了12.22%(P<0.05)、和0.73%(P>0.05);试验组比正对照组增加了11.41%(P<0.05)。平均背膘厚:试验组分别比正对照组和负对照组降低了27.42%(P<0.05)和28.57%(P<0.05)。表明添加中草药添加剂与正对照组和负对照组相比,胴体瘦肉率提高,脂肪率降低,差异显著;平均背膘厚降低,差异显著。
     (3)试验组的肌肉嫩度、滋味、多汁性和汤味都达到优秀;负对照组和正对照组,除嫩度、多汁性指标达到良好外,滋味和汤味均为中等。表明添加中草药添加剂与正对照组和负对照组相比,有效的改善了肉质和风味。
     以上试验结果证明:通过合理组方,提取天然中草药有效成分添加到猪日粮中,能有效改善生长育肥猪的生长速度,促进猪的生长发育,其效果与抗生素相当。表明中草药添加剂可以替代抗生素,起到促生长的作用,并能有效防止20~30kg仔猪发生腹泻。特别是在提高生长性能的基础上,显著提高胴体瘦肉率,增大眼肌面积;降低胴体脂肪率、背膘;改善肉品风味。
     研制开发的猪用中草药添加剂,通过饲养试验、屠宰试验和肉质分析,证实其达到了在组方时的目的:提高肉猪整体的防病抗病能力,均衡、协调生长;替代流行的抗生素、化学合成药物饲料添加剂,生产安全优质的猪肉;解决当前养猪生产上猪皮毛不红亮、腹泻等问题。经济效益明显。我们研究开发的不同阶段的猪用中草药添加剂值得在养猪生产上推广应用。
Based on the Chinese medicine theory and the practical conditions of swine production and the biology characteristics of pigs at different growth periods, a set of Chinese herbs feed additive for three stages of swine (postweaning , growing, finishing swine) were developed. And a feeding trial (from 20kg-110kg) was conducted to examine its effects on performance and carcass quality of growing-finishing pigs. 72 pigs (Duroc x Landrace x Yorkshire, 20kg initially) were selected and allocated to 3 groups at random which including a negative control group(NC), a Chinese herbs extract supplemented group (CHE), a positive control group (PC, antibiotics supplemented). Each group had 24 pigs with 3 replicates. A slaughter test was conducted at the end of the feeding trial, carcass index and meat qualities were examined . The results show:
    (1) The daily gain of the pigs in the CHE and PC was increased during 20-30kg. Compared with NC, the average daily gain (ADG) was increased by 9.57% and 5.98% (p<0.05) respectively. The feed conversion ratio was decreased by 4.97% and 1.10% respectively. No scour was observed for the pigs of the CHE group . And the rate of scouring in the PC was decreased by 93,64%(p<0.01), compared with NC. There was no significant difference for the daily gain among 3 groups during the growing period of 30~70kg (p>0.05).But the feed conversion rate of CHE and PC were decreased by 8.67%and 5.52%. During the 70~110kg period, daily gain was increased by 13.76% (p<0.05) and 12,74(p<0.05) and the feed conversion rate was decreased by 11.43% and 7.01% respectively. During 20~110kg, the daily gain of CHE and PC group were increased by 8.60% and 7.19% (p<0.05) compared with NC, the feed conversion rate of CHE and PC were decreased by 14.12% and 10.58%.
    
    
    
    (2)There was no significant difference in carcass weight and dressing percent among 3 teams when pigs were slaughtered at 110kg . the lean meat percent was increased significantly by supplement of CHE, and the fat percent in the CHE was decreased by 33.72% (p<0.05)and 38.35% (p<0.05) comparing with PC and NC. Area of lion muscle of CHE and PC group were increase by 12.22% (p<0.05) and 0.73(p<0.05) compared with NC. And TG was increased by 11,41%(p<0.05), compared with PC .The average meat back-fat thickness of CHE was decreased by 27.42%(p<0.05)and 28.57%(p<0.05),compared with PC and NC.
    (3)The tenderness degree of the muscle, the flavor , rich-in-juice and soup flavor in CHE were evaluated as excellent while only good and medium for that of NC and PC group.
    Based on the results of the present investigation, it is suggested that the Chinese herb extract, as feed additive can improve performance, carcass quality and meat quality of growing-finishing pigs provided it was developed reasonably. And its growth promoting effect is as good as antibiotics. It could be an alternative of antibiotics.
引文
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