首页 | 本学科首页   官方微博 | 高级检索  
相似文献
 共查询到20条相似文献，搜索用时 640 毫秒
1.
试验研究了3种不同类型的小肽产品等蛋白取代喷雾干燥血浆蛋白粉对21d断奶仔猪的生产性能和血液生化指标的影响。选用体重近似的192头(21±1)d断奶的皮杜长大四元杂交仔猪,随机分为4个处理,每个处理6个重复,每个重复栏8头猪。4个处理日粮分别为:添加2%喷雾干燥血浆蛋白粉的对照组和分别添加2%小肽产品A、B和C等蛋白取代血浆蛋白粉的T1、T2和T3试验组。试验期为21d。试验结果表明,添加3种不同肽产品等蛋白取代血浆蛋白粉对断奶仔猪的生产性能和血液生化指标均无显著影响(P>0.05),小肽产品可以部分等蛋白取代断奶仔猪日粮中的血浆蛋白粉。  相似文献   

2.
饲料肽对断奶仔猪生长及血液生化指标的影响   总被引：1，自引：0，他引：1  
将(21±1)d断奶的皮×杜×长×大仔猪144头随机分为3个处理组,每个处理6个重复。3个处理分别为:添加2%喷雾干燥血浆蛋白粉的对照组和分别添加1%、2%饲料肽等蛋白取代血浆蛋白粉的试验组,试验期21d。结果表明:添加饲料肽的试验组平均日增重、平均日采食量、饲料增重比和腹泻率均和血浆蛋白粉组差异不显著(P>0.05),各处理组的血液生化指标也没有显著差异(P>0.05)。日粮中添加1%～2%饲料肽可以等蛋白取代血浆蛋白粉,对断奶仔猪的生长没有显著影响。  相似文献   

3.
文章旨在评估用不同水平的单细胞蛋白或蛋白肽替代鱼粉对断奶仔猪生长性能、营养物质表观消化率及肠道绒毛形态的影响。试验将平均断奶日龄为(28±1)d、平均体重为(7.93±0.99)kg的断奶仔猪800头随机分为5组,每组5个重复,每个重复32头。对照组饲喂玉米-豆粕-鱼粉型日粮,处理组分别用3%和6%的单细胞蛋白和蛋白肽替代鱼粉,在为期28d的饲养试验后采集小肠,用于测定肠绒毛形态。结论 :鱼粉组断奶仔猪日增重较6%单细胞蛋白和6%蛋白肽组分别显著提高9.14%和7.87%(P 0.05),同时料重比显著降低9.43%和7.69%(P 0.05),鱼粉组、3%单细胞蛋白和蛋白肽组较6%单细胞蛋白和蛋白肽组显著提高了粗蛋白质表观消化率(P 0.05)。鱼粉组、3%单细胞蛋白和蛋白肽组空肠、回肠绒毛高度及绒毛高度与隐窝深度比值显著高于6%单细胞蛋白和蛋白肽组(P 0.05)。综上所述,在本试验条件下,在日粮营养水平相同的基础上,用3%的单细胞蛋白和蛋白肽替代鱼粉可以使断奶仔猪获得相似的生长性能、养分消化和肠道形态。  相似文献   

4.
本试验旨在对喷雾干燥鸡血浆蛋白粉在仔猪上的营养价值进行评定。试验采用单因子设计,将24头健康的"杜×长×大"三元杂交去势公猪(初始体重(24.96±1.05)kg)随机分配到3个处理,每个处理8个重复。分别饲喂无氮饲粮、玉米-豆粕型基础饲粮、鸡血浆蛋白粉饲粮(等氮替代基础饲粮中40%的氮)。所有仔猪预饲6d后,进行4d的消化代谢试验,收集全部粪尿,用于测定养分消化率和利用率。试验结束后所有仔猪麻醉屠宰,采集回肠末端食糜,用于测定氨基酸表观回肠消化率和标准回肠消化率。结果表明:喷雾干燥鸡血浆蛋白粉的粗蛋白质高达69.36%,赖氨酸含量为4.53%,蛋氨酸含量为1.65%,赖氨酸∶蛋氨酸∶色氨酸∶苏氨酸=100∶36∶30∶91,与猪的理想蛋白质氨基酸模式较接近;鸡血浆蛋白粉的表观消化能为16.02 MJ·kg-1,表观代谢能为15.39MJ·kg-1;粗蛋白质的表观消化率和真消化率分别为87.58%和91.11%;除了甘氨酸外,所有氨基酸的标准回肠消化率都高于80%。综上表明,喷雾干燥鸡血浆蛋白粉是一种优质的动物性蛋白质原料。  相似文献   

5.
本文利用 35日龄断奶仔猪对鱼粉、喷雾干燥血浆粉、浸出豆粕和经膨化后的浸出豆粕 4种蛋白质饲料进行了粗蛋白质和氨基酸的消化率测定。结果表明 :4种日粮的粗蛋白质表观消化率分别是81 .54%、86 .55%、76 .6 6 %和 79.86 % ;可消化粗蛋白含量分别是 1 4 .6 3%、1 5.53%、1 2 .2 7%和 1 4 .3% ;蛋白质净利用率分别是 6 6 .91 %、6 8%、6 1 .7%、6 4.4 0 % ;蛋白质生物学价值分别是 81 .4 2 %、78.51 %、73.2 2 %和 74 .87% ;4种日粮的赖氨酸表观消化率分别是 93.80 %、93.4 0 %、89.97%和 88.87%。通过本消化试验说明 ,该试验所用的血浆粉作为仔猪日粮的蛋白饲料原料与鱼粉效果相当 ,甚至优于鱼粉 ,为此在研制早期断奶仔猪全价日粮配方时可把血浆粉作为一种很好的蛋白饲料原料  相似文献   

6.
《饲料工业》2019,(9):26-32
为了探明大豆酶解蛋白替代仔猪饲粮中血浆蛋白粉、肠膜蛋白或鱼粉的功效。研究选择28 d断奶三元杂交(杜×长×大)仔猪320头,随机分为4个处理,每个处理4个重复,每个重复20头。分别饲喂:处理1:3%血浆蛋白+3%肠膜蛋白+3%鱼粉日粮;处理2(无血浆蛋白质):9%大豆酶解蛋白+3%肠膜蛋白+3%鱼粉日粮;处理3(无肠膜蛋白):4%大豆酶解蛋白+3%血浆蛋白+3%鱼粉日粮;处理4(无鱼粉):3.5%大豆酶解蛋白+3%血浆蛋白+3%肠膜蛋白日粮。试验猪于28 d开始饲喂各自日粮,于42～49 d,每个重复选择2只猪,用AIA法测定养分利用率(常规养分、氨基酸和总能表观消化率)。研究结果证明:以典型的3%血浆+3%肠膜+3%鱼粉日粮对比,9%大豆酶解蛋白+3%肠膜+3%鱼粉、4%大豆酶解蛋白+3%血浆+3%鱼粉和3.5%大豆酶解蛋白+3%血浆+3%肠膜组合的仔猪日粮可以获得较高的EE、CP、OM、CHO和GE表观利用率,可以使表观消化能分别提高2.2%、0.5%和1.6%(P0.05)。9%大豆酶解蛋白+3%肠膜+3%鱼粉、4%大豆酶解蛋白+3%血浆+3%鱼粉和3.5%大豆酶解蛋白+3%血浆+3%肠膜组合的仔猪日粮可以获得较高的日粮必需氨基酸(赖氨酸、蛋氨酸、色氨酸、精氨酸、组氨酸、亮氨酸、异亮氨酸、苯丙氨酸、苏氨酸和缬氨酸)和非必需氨基酸(天冬氨酸、丝氨酸、谷氨酸、甘氨酸、丙氨酸、胱氨酸、络氨酸)表观利用率。总必需氨基酸表观消化率可以分别提高0.96%、0.84%和2.74%。总非必需氨基酸表观利用率可以分别提高0.46%、0.75%和3.02%(P0.05)。由此证明,使用9%的大豆酶解蛋白可以替代日粮中3%的血浆蛋白粉,4%的大豆酶解蛋白可以替代日粮3%的肠膜蛋白质,3.5%大豆酶解蛋白可以替代日粮中3%的鱼粉。大豆酶解蛋白有提高仔猪日粮养分和能量利用率的功效。  相似文献   

7.
试验旨在研究日粮中添加中药复方发酵粉对断奶仔猪生长性能、养分表观消化率和消化酶活性的影响。选择32头体重为(14.96±0.96)kg的健康42日龄"杜×长×大"三元断奶仔猪,随机分成4个处理,每个处理8个重复,每个重复1头猪。对照组饲喂基础日粮,其余3组分别在基础日粮的基础上添加金霉素75 mg/kg、中药复方发酵粉600 mg/kg及金霉素75 mg/kg+中药复方发酵粉600 mg/kg。试验期为42 d。结果表明,日粮中添加中药复方发酵粉显著提高了仔猪的干物质、有机物和碳水化合物的表观消化率及表观消化能(P0.05),提高了必需氨基酸和非必需氨基酸(甘氨酸、天冬氨酸、丙氨酸、胱氨酸、酪氨酸)的表观消化率及脂肪酶活性(十二指肠、空肠、回肠)和淀粉酶活性(回肠)(P0.05)。金霉素和中药复方发酵粉对仔猪日增重、粗脂肪和粗蛋白质的表观消化率及表观消化能和亮氨酸、苯丙氨酸、丝氨酸的表观消化率有显著的交互效应(P0.05);与对照组相比,金霉素组和中药复方发酵粉组显著提高了日增重、粗脂肪和粗蛋白质的表观消化率及苯丙氨酸和丝氨酸的表观消化率(P0.05),但两组间差异不显著(P0.05)。由此可见,日粮中添加600 mg/kg中药复方发酵粉能提高断奶仔猪养分表观消化率、氨基酸表观消化率和肠道消化酶活性。  相似文献   

8.
本试验旨在研究喷雾干燥血浆蛋白粉对仔猪生长性能和养分表观消化率的影响。选择160头31日龄仔猪,随机分为对照组和试验组,对照组饲喂基础日粮,试验组添加3%喷雾干燥血浆蛋白粉,试验期14d。结果表明:日粮添加3%喷雾干燥血浆蛋白粉显著提高了仔猪的日增重(P0.05),降低了仔猪腹泻率(P0.05);显著提高了仔猪对饲料干物质的表观消化率(P0.05),对钙、磷、粗蛋白质的表观消化率有提高的趋势,但差异不显著(P0.05)。喷雾干燥血浆蛋白粉适合仔猪的营养需要,可以应用于生产。  相似文献   

9.
研究主要考察大米浓缩蛋白部分或全部替代鱼粉对断奶仔猪生长性能、养分消化率和肠道发育的影响。选择108头25日龄DLY断奶仔猪,按照单因素试验设计,分别饲喂对照日粮(含鱼粉5%),大米浓缩蛋白粉替代50%或100%鱼粉的日粮,试验期21 d。结果发现,大米浓缩蛋白替代50%鱼粉对断奶仔猪生长性能和养分表观消化率没有显著影响(P0.05)。大米浓缩蛋白全部替代鱼粉显著降低日采食量和日增质量(P0.05),显著提高料重比(P0.05),同时显著降低能量、干物质和粗蛋白表观消化率(P0.05)。各处理组对肠道绒毛高度、隐窝深度和绒毛高度/隐窝深度比值没有显著影响(P0.05)。总结以上数据,大米浓缩蛋白可部分替代断奶仔猪日粮中鱼粉而不影响生长性能。  相似文献   

10.
为了给新型蛋白质饲料(鸡肉粉和羽毛粉)的应用提供理论依据,试验用《饲料中氨基酸的测定方法》(GB/T 18246—2000)测定鸡肉粉、羽毛粉和鱼粉三种动物源性蛋白质饲料中氨基酸的含量并进行分析。结果表明:在三种动物源性蛋白质饲料中,鱼粉中含硫氨基酸含量最高,为2.132%;鱼粉中的缬氨酸(Val)与赖氨酸(Lys)比值为0.606,最接近断奶仔猪的营养需求;鱼粉中的必需氨基酸(EAA)与非必需氨基酸(NEAA)比值为68.709%;必需氨基酸与总氨基酸(TAA)比值为41.432%,与联合国农粮组织(FAO)/世界卫生组织(WHO)的标准规定值差异不显著(P0.05);羽毛粉中的TAA、支链氨基酸(BCAA)和鲜味氨基酸(FAA)含量高于鸡肉粉和鱼粉,分别为80.603%、15.673%和33.826%;鸡肉粉的TAA含量和FAA含量(分别为65.335%和30.771%)高于鱼粉。说明鱼粉是一种优质的动物蛋白质饲料,羽毛粉和鸡肉粉可作为鱼粉的补充替代品。  相似文献   

11.
1-(2-Chloroethyl)3-cyclohexyl-1-nitrosourea (CCNU) is an alkylating agent in the nitrosourea subclass. A prospective evaluation of CCNU was done to determine the maximally tolerated dosage of CCNU in tumor-bearing cats. Response data were obtained when available. Twenty-five cats were treated with CCNU at a dosage of 50-60 mg/m3 body surface area. Complete hematologic data were available for 13 cats. Neutropenia was the acute dose-limiting toxicity. The median neutrophil count at the nadir was 1,000 cells/microL (mean, 2,433 cells/microL; range, 0-9,694 cells/microL). The time of neutrophil nadir was variable, occurring 7-28 days after treatment, and counts sometimes did not return to normal for up to 14 days after the nadir. Based on these findings, a 6-week dosing interval and weekly hematologic monitoring after the 1st treatment with CCNU are recommended. The nadir of the platelet count may occur 14-21 days after treatment. The median platelet count at the nadir was 43,500 cells/microL. No gastrointestinal, renal, or hepatic toxicities were observed after a single CCNU treatment, and additional studies to evaluate the potential for cumulative toxicity should be performed. Five cats with lymphoma and 1 cat with mast cell tumor had measurable responses to CCNU. Phase II studies to evaluate antitumor activity should be completed with a dosing regimen of 50-60 mg/m3 every 6 weeks.  相似文献   

12.
Continuous rate infusion (CRI) of furosemide in humans is considered superior to intermittent administration (IA). This study examined whether furosemide CRI, compared with IA, would increase diuretic efficacy with decreased fluid and electrolyte fluctuations and activation of the renin-angiotensin-aldosterone system (RAAS) in the horse. Five mares were used in a crossover-design study. During a 24-hour period, each horse received a total of 3 mg/kg furosemide by either CRI (0.12 mg/kg/h preceded by a loading dose of 0.12 mg/kg IV) or IA (1 mg/kg IV q8h). There was not a statistically significant difference in urine volume over 24 hours between methods; however, urine volume was significantly greater after CRI compared with IA during the first 8 hours ([median 25th percentile, 75th percentile]: 9.6 L [8.9, 14.4] for CRI versus 5.9 L [5.3, 6.0] for IA). CRI produced a more uniform urine flow, decreased fluctuations in plasma volume, and suppressed renal concentrating ability throughout the infusion period. Potassium, Ca, and Cl excretion was greater during CRI than IA (1,133 mmol [1.110, 1,229] versus 764 mmol [709, 904], 102.7 mmol [96.0, 117.2] versus 73.3 mmol [65.0, 73.5], and 1,776 mmol [1,657, 2.378] versus 1,596 mmol [1,457, 1,767], respectively). Elimination half-lives of furosemide were 1.35 and 0.47 hours for CRI and IA, respectively. The area under the excretion rate curve was 1,285.7 and 184.2 mL x mg/mL for CRI and IA, respectively. Furosemide CRI (0.12 mg/kg/h) for 8 hours, preceded by a loading dose (0.12 mg/kg), is recommended when profound diuresis is needed acutely in horses.  相似文献   

13.
The epidemiology of H. placei and of other gastrointestinal nematodes in yearling dairy cattle was examined on two farms in Kiambu District, central Kenya during each of 13 one-month periods from April 1993 to April 1994. On each farm, 32 newly weaned dairy calves were given a single dose of albendazole and then placed on experimental pastures. Twelve of the animals were designated for bi-monthly slaughter (n = 2) and analysis of worm population characteristics and 20 were designated for blood and faecal collection and for weighing. Two parasite-free tracer calves were grazed alongside the weaner calves each month throughout the study period and were also slaughtered for analysis of worm populations. Faecal egg counts, haematological and serum pepsinogen determinations, herbage larval counts, and animal live weight changes were recorded monthly. The study revealed that Haemonchus placei, Trichostrongylus axei, Cooperia spp. and Oesophagostomum radiatum were responsible for parasitic gastroenteritis and that H. placei was the predominant nematode present in the young cattle on both farms. Faecal egg counts from resident cattle and necropsy worm counts revealed that pasture larval levels were directly related to the amount of rainfall. The total worm burdens in the animals were highest during the rainy season (March–June and October–December) and lowest during the dry seasons (July–September and January–February). The very low recovery of immature larvae of H. placei from the tracer calves indicated that arrested development is not a feature of the life cycle of this parasite in central Kenya. The maintenance of the parasite population depended on continuous cycling of infection between the host and the pasture. The agroclimatic conditions of the study area were such that, in general, favourable weather conditions for the development and survival of the free-living stages of gastrointestinal nematodes existed all year round.  相似文献   

14.
The occurrence of ectoparasites in sheep flocks is frequently reported but seldom quantified. Sheep production used to be a predominantly family activity in the state of Sa~o Paulo (Brazil), but it began to become a commercial activity in the past decade. Thus, information about the ectoparasites existing in sheep flocks has become necessary. The present data were obtained by means of questionnaires sent to all sheep breeders belonging to the `Associaça~o Paulista de Criadores de Ovinos' (ASPACO; Sa~o Paulo State Association of Sheep Breeders). Response reliability was tested by means of random visits paid to 10.6% of the respondents. Most of the properties (89.5%) reported the presence of one or more ectoparasites. Screw-worm (Cochliomyia hominivorax) was the most frequent ectoparasite (72.5%), followed by bot fly larvae (Dermatobia hominis, 45.0%), ticks (Amblyomma cajennense) and Boophilus microplus, 31.3%) and finally lice (Damalinia ovis, 13.8%). Combined infestations also occurred, the most common one being screw-worm with bot fly larvae (36.0%) followed by bot fly larvae with ticks (13.9%), screw-worm with ticks (9.3%), bot fly larvae with lice (6.9%), and ticks with lice (5.0%). The most common triple combination was screw-worm, bot fly larvae and ticks (12.8%). Breeds raised for meat or wool were attacked by bot fly larvae and ticks more often than other breeds. Lice were only absent from animals of indigenous breeds. The relationships among these ectoparasites are discussed in terms of sheep breeds, flock size, seasonality and the ectoparasitic combinations on the host.  相似文献   

15.
Comparison of different tests to diagnose feline infectious peritonitis   总被引：1，自引：0，他引：1  
  相似文献   

16.
An experiment was conducted to study disappearance of C14 to C18 fatty acids, lag times and biohydrogenation (BH) rates of C18 fatty acids of ground soya bean and canola seeds in situ. Three ruminally fistulated Dallagh sheep were used to determine ruminal BH of unsaturated fatty acids (UFAs). Differences in the disappearance of fatty acids through the bags and lag times were observed between the oilseeds. We saw that the longer the incubation time of the oilseeds in the rumen, the lower the content of C18:2 and C18:3. Significantly higher lag times for both C18:2 and C18:3 were observed in ground canola compared to ground soya bean. BH rates of C18:2 and C18:3 fatty acids in soya bean were three times higher than those of canola. These results suggest that the fatty acid profile of fat source can affect the BH of UFAs by rumen micro‐organisms. So that UFAs of canola had higher ability to escape from ruminal BH. It seems that fatty acid profile of ruminant products is more affected by canola seed compared to soya bean seed.  相似文献   

17.
Serum biochemical values and the wet weight to dry weight ratios of tissues were determined in yaks in Shandan county of Gansu province. The liver, kidney, heart and muscle contents of seven elements in yaks were also analysed. Most serum biochemical values were similar to those of cattle, camels and sheep, but the calcium concentration was considerably above the normal range for other ruminants. The liver contained the highest concentrations of copper, manganese and cobalt and the kidney of selenium, iron and calcium.Abbreviations Alb albumin - ALT alanine aminotransferase - AST aspartate aminotransferase - BUN blood urea nitrogen - Chol cholesterol - Glob globulin - -GT -glutamyl transpeptidase - IP inorganic phosphorus - TP total protein  相似文献   

18.
A knowledge of the microbiological status of milk and of the different structures in the mammary glands has great importance in elucidating the pathogenesis of mammary gland infections. The objective of this study was to evaluate the microbiological status of various structures in the mammary glands from naturally infected dairy cows following slaughter. A total of 94 samples of milk, 184 samples of mammary parenchyma, 168 samples of gland cisterns, and 168 samples of teat cisterns were collected for microbiological examination. Microorganisms were detected in 59.9% of all samples, 67.0% of the milk samples, 70.1% of the mammary parenchymas, 55.9% of the gland cisterns and 48.8% of the teat cistern samples. When all samples were considered, coagulase-negative Staphylococcus were the most prevalent (35.7%) followed by coagulase-positive Staphylococcus (12.2%), Corynebacterium bovis (2.4%), Prototheca sp. (1.9%), and Streptococcus dysgalactiae (1.5%). There was a significantly higher occurrence of microorganisms in the milk and mammary parenchyma compared to the gland cisterns and teat cisterns. This revised version was published online in July 2006 with corrections to the Cover Date.  相似文献   

19.
Four grass plots were sequentially contaminated with goat faeces containing known numbers of unembryonated eggs of predominantly Haemonchus contortus and Trichostrongylus spp. between October 1982 and April 1983. Four other plots were similarly contaminated with sheep faeces between February and May 1987. An additional plot was repeatedly contaminated with sheep faeces from February to April 1987. Populations of free-living stages in faeces and of infective larvae (L3) in the herbage were subsequently monitored until the end of April and June of 1983 and 1987 respectively. During February and May 1987 two control cultures of sheep faeces were incubated in the laboratory at 25°C–30°C and at a constant temperature of 50°C and the free-living development was also monitored. L3 developed very readily in the faeces cultured at 25°C–30°C and in those spread on a grass plot in October, at the end of the wet season, but developed less on the plot contaminated in May at the start of the wet season. Worm eggs in faeces deposited on plots during the hot dry season (December to April) or incubated at 50°C died and disintegrated after 24–48 h exposure to the high environmental temperatures. The results indicate that it is unlikely that gastrointestinal nematodes of sheep and goats can develop or survive on open pasture during the dry season in the Nigerian derived savanna zone.  相似文献   

20.
  相似文献   

设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号