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植酸酶和木聚糖酶对断奶仔猪生长性能及蛋白质利用率的影响 总被引：1，自引：0，他引：1
本试验研究了在饲粮中添加植酸酶和木聚糖酶对断奶仔猪生长性能及蛋白质利用率的影响。采用完全随机设计．将90头35日龄的断奶仔猪分为5组．每组3个重复．每个重复6头。5个处理组分别为：（1）玉米-豆粕基础日粮（正对照组．PC），（2）基础日粮-75％磷酸氢钙（负对照组．NC）．（3）负对照组＋植酸酶（植酸酶组，phy），（4）负对照组＋木聚糖酶（木聚糖酶组，xy），（5）负对照组＋植酸酶＋木聚糖酶（植酸酶-木聚糖酶组，phy—xy）．植酸酶的添加量为750U／kg，木聚糖酶的添加量为4000U／kg。结果表明：低磷饲粮添加植酸酶或木聚糖酶后．平均日增重和平均日采食量都得到了明显改善（P〈0．05）．植酸酶和木聚糖酶同时添加对仔猪平均日增重的改善极显著（P〈0．01）。在低磷口粮组单独添加植酸酶或同时添加植酸酶和木聚糖酶极显著提高了蛋白质生物学价值（P〈0．01）。饲粮加酶后，血清尿素氮浓度显著降低（P〈0．05）．添加植酸酶或同时添加植酸酶和木聚糖酶后．血清总蛋白浓度显著升高（P〈0．05）．但添加酶对蛋白质表观消化率无显著影响．总之．在断奶仔猪低P日粮中添加植酸酶或木聚糖酶都不同程度地改善了仔猪生长性能．促进了蛋白质的利用．二酶同时添加对仔猪的平均日增重有显著的协同效应． 相似文献
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以断奶仔猪为试验对象,探讨海滨锦葵块根粉和酶制剂对断奶仔猪生长和免疫的影响。64头28日龄断奶仔猪随机分为4组,对照组饲喂基础日粮,试验I、Ⅱ、Ⅲ组分别饲喂基础日粮添加0．02％复合酶制剂、0．50％和1．00％海滨锦葵块根粉。试验期28d。结果表明,酶制荆和海滨锦葵块根粉对断奶仔猪的日采食量和日增重有提高趋势,但差异不显著（P〉0．05）;与对照组相比,酶制剂和海滨锦葵块根粉对断奶仔猪血清中溶菌酶活性无显著影响（P〉0．05）;有降低血清中TNF-Ⅱ含量的趋势,但差异不显著（P〉0．05）;与对照组相比,酶制剂可以显著降低IL-6含量（P〈0．05）,海滨锦葵块根粉也降低了IL6含量,但差异不显著（P〉0．05）;与对照组相比,酶制剂组、0．50％和1．00％的海滨锦葵块根粉组的猪瘟疫苗抗体效价分别提高了15．27％（P〉0．05）、18．18％（P〉0．05）和5I．64％（P〈0．05）。结果提示,酶制剂与海滨锦葵块根粉对断奶仔猪生长性能有提高趋势,同时也可以提高断奶仔猪的机体免疫力。 相似文献
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试验选用600只樱桃谷肉鸭,随机分为5组,分别为Ⅰ组（正对照组,饲喂基础日粮）,Ⅱ组（负对照组,有效磷水平降低,未添加植酸酶）,Ⅲ组（负对照＋500U／kg植酸酶）,Ⅳ组（负对照十1000U／kg植酸酶）及Ⅴ组（负对照＋10000U／kg植酸酶）,每组6个重复,研究植酸酶对肉鸭屠宰性能及血清学指标的影响。结果表明：（1）与负对照Ⅱ组相比,Ⅳ组21日龄肉鸭血清BUN及42日龄UA水平分别降低41．74％与7．92％,而Ⅳ、Ⅴ组42日龄肉鸭的TP含量分别提高15．55％和15．45％（P〈0．05）;（2）与Ⅱ组相比,试验Ⅲ、Ⅳ、Ⅴ组屠宰率、半净膛重、全净膛重、全净膛率、胸肌率和腿肌率均有提高趋势（P〉0．05）;（3）与Ⅰ组相比,Ⅱ组21日龄肉鸭肝脏重显著提高17．60％（P〈0．05）;Ⅱ组42日龄肉鸭肝脏指数分别比Ⅰ、Ⅳ、Ⅴ组提高25．719／6、26．02％和29．04%（P〈0．05）。结果表明,日粮中添加植酸酶可不同程度提高肉鸭蛋白沉积,促进器官发育,提高屠宰性能,以1000U／kg添加水平效果最佳。 相似文献
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选择健康的14日龄三黄鸡375羽（311．31±7．49g），按同质原则随机分成5组，正对照组为正常有效磷水平，中鸡料和大鸡料有效磷水平分别为0．40％和0．35％；负对照组日粮有效磷水平降低0．05％，中鸡料和大鸡料有效磷水平分别为0．35％和0．30％），产品1组、产品2组、产品3组分别为负对照组基础上分别添加3个不同厂家的植酸酶产品。结果表明：（1）15～52日龄负对照组平均日增重显著低于正对照组（P〈0．05），料肉比有高于正对照组的趋势（P〈0．10）；添加植酸酶的各组中，除产品3组外，其它组的采食量均显著低于正对照组（P〈0．05），产品3组的日增重显著高于正负对照组（P〈0．05）。（2）负对照组胫骨灰分、钙、磷含量显著低于正对照组（P〈0．05）。植酸酶添加组中，产品3组的胫骨灰分、钙、磷含量均与正对照组无显著差异，且产品3组的胫骨灰分和钙、磷含量显著高于负对照组（P〈0．05）；产品2组的胫骨灰分和钙含量与正对照组无显著差异，而磷含量显著低于正对照组（P〈0．05）；产品1组胫骨灰分、钙、磷含量均显著低于正对照组（P〈0．05）。由此可知，日粮可以通过添加植酸酶降低饲料无机磷的含量，但不同植酸酶产品的效果存在差异；本试验中，产品3植酸酶的效果相对较好. 相似文献
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饲粮中添加稀土对生长肥育猪生产性能的影响 总被引：1，自引：0，他引：1
试验选用胎次、体重和日龄相近的杜长大三元杂交猪为试验动物,其中断奶仔猪58头,育成猪56头,肥育中猪34头,公母各半,随机将其分别分成试验组、对照组。试验组饲粮中添加0．1％稀土饲料添加剂,有机稀土水剂,饲粮稀土氧化物含量为75mg／kg。结果表明,断奶仔猪试验组平均日增重0．477kg,比对照组（0．388kg）提高了22．90％（P＜0.05）;育成猪试验Ⅰ组和试验Ⅱ组平均日增重分别为0．267和0．464kg,分别比对照Ⅰ组、Ⅱ组提高了20.27％（P＜0．05）和18．07％（P＜0．05）;肥育中猪试验组日增重0．720kg,比对照组提高了13．03％（P＜0．05）;各试验组饲料效率和经济效益均优于各对照组,生产性能明显改善。 相似文献
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该试验选取28日龄杜×长×大三元杂交断奶仔猪60头,称量始重,差异不显著（P〉0．05）,随机分成3组,每组20头,分剐为对照组（日粮中不添加溶菌酶）、试验Ⅰ组（每吨日粮添加溶菌酶300g）、试验Ⅱ组（每吨日粮添加溶菌酶500g）,每组两个重复,每个重复组10头,试验期为4周。试验结果表明：在断奶仔猪日粮中添加溶菌酶500g／t能够控制腹泻,提高日增重16．68％,差异显著（P〈0．05）;降低料重比12．00％,差异显著（P〈0．05）。 相似文献
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选择80只断奶新西兰白兔，按体重、性别均匀分为4组，对照组日粮中含未经发酵处理的花生秧粉35％，试验Ⅰ、Ⅱ、Ⅲ组分别在日粮中添加15％、25％、35％的发酵花生秧粉代替未经发酵的花生秧粉，测定30～70日龄阶段的日增重、耗料量和饲料转化率。结果显示：日粮添加发酵草粉能显著提高日增重和饲料转化率，试验Ⅰ、Ⅱ、Ⅲ组只均增重和日增重与对照组均存在显著差异（P〈0．05）或极显著差异（P〈0．01）；试验Ⅰ、Ⅱ、Ⅲ组的料重比与对照组均存在显著差异（P〈0．05）或极显著差异（P〈0．01），分别降低6．16％、7．84％、12．32％；试验Ⅰ、Ⅱ、Ⅲ组发病死亡率与对照组分别下降5％、10％和20％；试验Ⅰ、Ⅱ、Ⅲ组只均获利分别比对照组提高14．87％、23．56％、45．36％。 相似文献
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试验选用64头25日龄杜×（大×长）三元杂交断奶仔猪。随机分为4组：A、B、C为试验组,分别用猪肠膜蛋白粉（DPS）、大豆浓缩蛋白（SPC）、喷雾干燥猪血浆蛋白粉（SDPP）部分取代基础饲粮的鱼粉;D为对照组,饲喂基础饲粮（玉米-豆粕-鱼粉）。试验从仔猪25日龄断奶开始,70日龄结束。结果显示：试验组日增重均显著高于对照组,其中B组比对照组高13．18％（P〈0．05）;A组、C组分别比对照组高11．53％（P〈0．05）、4．43％（P〈0．05）;B组和A组日增重差异不显著（P〉0．05）,但均显著高于C组,分别高8．38％（P〈0．05）、6．80％（P〈0．05）。B组日采食量比对照组高4．82％（P〈0．05）,A组、C组与对照组相比,日采食量有提高的趋势,但差异不显著（P〉0．05）。A组、B组与对照组相比,料肉比有降低的趋势（P〉0．05）。由此可见,本试验条件下,大豆浓缩蛋白、猪肠膜蛋白粉、猪血浆蛋白粉对早期（25日龄）断奶仔猪的饲喂效果均优于鱼粉,且大豆浓缩蛋白、猪肠膜蛋白粉对仔猪日增重的改善幅度大于喷雾干燥猪血浆蛋白粉（P〈0．05）。 相似文献
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以蛋白含量17％、有效磷含量0.2％的低氮低磷日粮为基础日粮,对照组不添加植酸酶,试验组分别按照0.01％、0.02％、0.03％、0.04％（试验Ⅰ、Ⅱ、Ⅲ、Ⅳ组）添加植酸酶,研究低磷日粮中添加植酸酶对仔猪生产性能和钙、磷及微量矿物元素表观消化率的影响.结果表明：与对照组相比,试验Ⅲ组生长性能和矿物元素消化吸收显著高于对照组（P＜0.01）和其他试验组（P＜0.05）.与对照组相比,试验Ⅲ组,日增体质量显著提高16.11％,料重比显著降低11.36％,其磷、钙、铁、锌、铜、锰表观消化率分别提高16.90％、14.79％、16.53％、24.03％、28.39％、11.43％,粪尿磷含量降低50.10％;可见,低磷仔猪日粮中添加0.03％植酸酶,能有效提高仔猪的生产性能,降低料重比,提高钙、磷及微量矿物元素的表观消化率,减少粪尿磷含量,降低环境污染. 相似文献
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魏静 《四川畜牧兽医学院学报》2009,(4):28-32
在现代法律秩序中,商会自治规范是制定法的基础和必要的补充,甚至在某些方面替代了制定法;商会自治规范主要包括商会组织规范、行为规范、惩罚规范以及争端解决规范等;其效力仅及于其内部成员;商会自治规范和制定法之间存在冲突,但也存在整合的基础。 相似文献
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本文概述了猪的毛色类型、猪的毛色遗传模式,着重综述了猪毛色基因分子基础的研究进展,指出存在问题并就未来发展方向做了思考。 相似文献
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REASONS FOR PERFORMING STUDY: Centesis of the bicipital bursa using an 8.9 cm long spinal needle has been reported but the alternative of employing a 3.8 cm long hypodermic needle requires validation. OBJECTIVE: To compare the efficacy of 2 different methods of centesis of the bicipital bursa and to evaluate the usefulness of ultrasonographic imaging to determine the location of solution administered when centesis of the bursa is attempted. METHODS: For Trial 1, 6 clinicians, who had no previous experience of centesis of the bicipital bursa, attempted to inject a solution composed of an aqueous radiopaque contrast medium and physiological saline solution (PSS) into the bicipital bursae of 2/12 horses using the previously described distal approach to inject one bursa and a proximal approach to inject the contralateral bursa. The bicipital tendon and bursa were examined ultrasonographically before and after injection; and both shoulders were examined radiographically to identify the location of the medium. In Trial 2, another 6 clinicians, also with no previous experience of centesis, repeated Trial 1, using 6 horses, but the radiopaque contrast medium was mixed with air instead of PSS. RESULTS: Accuracy of centesis using the proximal approach was 39% and that of the distal approach 28%. Ultrasonographic examination of the shoulder allowed the location of solution and air to be accurately predicted in all 12 shoulders examined. CONCLUSIONS: Clinicians who have had no previous experience performing centesis of the bicipital bursa are unlikely to be successful in centesis using either approach. Radiographic examination after injecting a radiopaque contrast medium may be necessary to assess the success of centesis especially if bursal fluid is not obtained during centesis. Injecting air along with the radiopaque contrast medium provides more accurate ultrasonographic confirmation of centesis and better radiographic definition than does injection without air. 相似文献
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Effects of size of ingestively masticated fragments of plant tissues on kinetics of digestion of NDF
Ingestively masticated fragments were collected and sized via sieving. Different sizes of esophageal masticate and ruminal digesta fragments, and ground fragments of larger masticated pieces were incubated in vitro, and undigested NDF remaining at intervals of up to 168 h of incubation was determined. The ruminal age-dependent time delay (tau) for onset of digestion of NDF was positively correlated (P < 0.004) with the mean sieve aperture estimated to retain 50% of the fragments between successive sieve apertures (MRA). Degradation rate of potentially degradable NDF (PDF) and level of indigestible NDF were not related (P > 0.10) to MRA of masticated and ground fragments. Estimates of tau were positively related to MRA, with slopes of bermudagrass < corn silage < ruminal fragments of corn silage. It was concluded that fragment size-, and consequently, ruminal age-dependent onset of PDF degradation of a mixture of different fragment sizes results in an age-dependent rate of degradation of the more rapidly degrading of two subentities of PDF. Models are proposed that assume a tau before onset of simultaneous degradation of PDF from two pools characterized as having gamma-modeled age-dependency and age-constant rates. The ruminal age-dependent pool seems to be associated with the faster-degrading pool, and its rate parameter increases with range in MRA in the population of fragments. Conceptually, the ruminal age-dependent rate parameter for PDF degradation seems to represent a composite of several effects: 1) effects of the size-dependent tau; 2) range in MRA of the population of ingestively masticated fragments; and 3) subentities of PDF that degrade via more rapid age-dependent rates compared with subentities of PDF that degrade via age-constant rates. The estimated fractional rates of ruminative comminution of ingestively masticated fragments (0.060 to 0.075/h) were of a magnitude similar to the mean fractional rates of PDF digestion (0.030 to 0.085/h), which implies that ruminative comminution may be first-limiting to fractional rate of PDF digestion. The in vivo roles of ingestive and ruminative mastication of fragments on PDF degradation must be considered in any kinetic system for estimating PDF digestion in the rumen. These results and others in the literature suggest that the rate of surface area exposure rather than intrinsic chemical attributes of PDF may be first-limiting to degradation rate of PDF in vivo. 相似文献
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以国际标准强毒Ｒ株人工感染非免疫产蛋鸡,定时扑杀,分别从鼻窦、眶下孔、气管、肺、气囊、卵巢和输卵管分离ＭＧ,并收集感染鸡所产蛋分离ＭＧ。结果表明,人工感染４８小时后上、下呼吸道及肺已被全面感染,９６小时气囊已被感染,１２０小时输卵管已能分离到ＭＧ,卵巢始终分离不到ＭＧ。人工感染鸡自１４４小时便能在其所产蛋中分离出ＭＧ。药物治疗能在７２小时内消除感染,油乳剂苗则需２４天后逐渐降低蛋内ＭＧ分离率,药物卵内注射、种蛋药浴、高温处理均能杀死卵内ＭＧ,但以研制的种蛋浸泡剂药浴效果为最好。 相似文献