【作者】 谢铁牛；

【导师】 王继成；

【作者基本信息】 湖南农业大学 ， 动物营养与饲料科学， 2003， 硕士

【摘要】 选用日龄、平均体重相近、公母各半的三元杂交(杜长大)断奶仔猪72头，断奶日龄为34±2天，采用完全随机单因子设计将其分成4个处理，每个处理设3个重复，对照组按试验猪场原饲养水平饲养，试验1、2、3组，分别按0.6％、4％、5.5％的添加比例添加油脂(豆油)，在此基础上设计对照组、试验1、2、3组蛋能比分别为14.2，12.8，12.6，12.5(g／MJ)。 试验结果表明： 1．在试验期0-2周，各项指标的差异均未达到显著水平。日增重、采食量、饲料转化率随油脂添加量增加而增加，以4％的豆油组最高。因此，断奶后0-2周的日粮添加油脂不影响仔猪生长性能。2-4周，各项指标均随豆油添加量提高而变化，且以4％的豆油添加水平最好(p＜0.05)，饲料转化率也相对较高。综上所述，试验期0-4周日增重、采食量的变化，4％的豆油处理组显著高于其它处理组(p＜0.05)，日增重分别比0％、0.6％、和5.5％豆油处理组分别提高26.2％、20.4％和19.8％。本试验表明，过高比例(5.5％)的油脂添加，生产性能的各项指标均有所下降。 2．试验1组、试验2组腹泻率低于对照组；试验3组仔猪腹泻率高于对照组；其中试验2组(4％豆油)仔猪腹泻率最低。 3．试验结束后，分别从每组每个重复随机抽取一头猪作胰腺脂肪酶和空肠脂肪酶活性测定。结果表明，对照组、试验1、2、3组胰腺脂肪酶活性及空肠脂肪酶活性差异不显著(p＞0.05)。说明，随着日龄的增加，达到断奶后4周末，添加油脂对脂肪酶活性没有显著影响。 本试验，以4％油脂添加组脂肪酶活性最高。更多还原

【Abstract】 Seventy-two health crossbred weanling pigs(DurocxLandracexLarge Yorshire),with same ages and average initial body weight,and the same amounts of male and female,wlich were weaned on the days of 34? and then were assigned to four dietary treatments according to completely randomly individual factorial design.Each treatment has three repeats.The control group was fed as uaual feeding level.Grease were added at the ratio of 0.6% 4% and5.5% respectively to the trial groups of 1, 2, 3, on the base of which different ratios of 14.2% 12.8%, 12.6% 12.5%g/MJ of protein and energy were designed for control group and the trial groups of 1, 2, 3The results showed that:1.Growth performance: During the phase 1(0 to 2 weeks),there was no significant different of each indexAverage daily gain(ADG) Average daily feed intake(ADFI) feed conversion ratio (FCR) were increased with the increasement of grease.The trial group with 4% grease was highest among of them.Therefore,adding grease has no effect on the growth performance of piglets on the 0 to 2 weeks after weaned.During the phase 2(2 to 4 weeks),each index all have changes as second gear curve with the increasement of grease .Among of dl the treatments,the group with 4% grease was best,ADG and ADFI of which were significantly higher than that of the treatments with 0% 0.6% 5.5%of grease(P<0.05),and FCR is higher than them.In conclusion,ADG and ADFI have the secong gear curve changes on the 0 to 4 weeks,and the treatment with 4% of grease was significantly higher than that of othergroups(P<0.05).ADG of the treatment with 4% of grease was improved 26.2% 20.4%and 19.8% than the treatments with 0% 0.6%and 5.5% of grease.So we can have the conclusion:adding too high ratio(5.5%) of grease to the diet,each index of growth performance would be graded.2. Diarrhea rate: Diarrhea rate of the first treatment and second treatment were lower than control group, but the third group was higher than control group; Diarrhea rate of the second group (4% of grease)was the lowest.3. One piglet was randomly selected from each repeat to appraise the activity of pancreas fat enzyme and enteron fat enzyme. The results showed that the activity of fat enzyme had no significant difference among the treatments(P>0.05). At implied that soybean oil had no significant influence on the activity of fat enzyme after four weeks. The actioity of fat enzyme of 4% soybean oil treatment was highest.更多还原