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 171 毫秒
1.
选择120头本地饲养的哈白猪随机分为4组,每组设2个重复。4组分别饲喂养0mg/kg、10mg/kg、100mg/kg、1000mg/kg的商品用复合酶制剂。试验结果表明,猪日粮中添加酶制剂,可促进生长和改善饲料利用率。与对照组相比,添加10mg/kg酶制剂组平均日增重提高7．69％（P＜0．05）,饲养利用率提高,4．70％（P＜0．05）,经济效益提高50．76（P＜0．01）;添加100mg/kg酶制剂组平均日增重提高7．69(P<0.05),饲养利用率提高8．39％（P＜0．01）,经济效益提高79．72％（P＜0．01）;添加1000mg/kg酶制剂组平均日增重提高3．08％（P＞0．05）,饲料利用率提高5．70％（P＜0．05）,经济效益提高－10．90％（P＞0．05）。  相似文献   

2.
木聚糖酶在肉鸡小麦日粮中的应用效果   总被引：5，自引：0，他引：5  
选用健壮、活泼、均匀1日龄艾维茵肉鸡360羽，饲养至22日龄时进行称重，保证组间个体均重差异不显著。随机分为3个处理（每处理3个重复，每个重复40羽），分别饲喂正对照组饲粮（玉米-豆粕型日粮）、负对照组饲粮（小麦型饲粮）、小麦型日粮添加100g／t木聚糖酶的饲粮。试验在第22-49日龄进行，为期28d。自由采食、饮水。计算平均日增重、料重比、成活率，并进行经济效益分析。试验结果，与正对照组相比，负对照组的日增重降低2．16％，料重比和日采食量没有变化，差异均不显著（P〉0．05）；试验组日增重分别比正、负对照组提高2．38％（P〉0．05）和4．65％（P〈0．05），料重比均下降6．91％（P〉0．05），成活率显著提高6．47％（P〈0．05）。试验组对于正对照组和负对照组的生物学综合评定值分别为105、5％、103．7％，均大于100％，这说明小麦加木聚糖酶日粮比玉米日粮、小麦日粮更能促进肉大鸡生长性能的发挥。与正对照组相比，负对照组的单位增重饲料成本降低了0．15元／kg，试验组单位增重饲料成本降低了0．49元／kg。  相似文献   

3.
试验旨在研究饲料中添加中草药健肽风味速肥散对育肥猪的生产性能、胴体肉质及营养指标的影响。选用（60．25＋037）kg的“杜×长×大”三元杂交肉猪60头，采用单因子随机分组设计：对照组（基础日粮组）和试验组（基础日粮＋06％中草药健肽风味速肥散），每个处理组5个重复栏，每栏（3m×3m）6头，饲养周期为55d。研究结果显示，添加0．6％健肽风味速肥散试验组的三元猪平均日增重显著高于对照组，料重比显著低于对照组（P〈0．05）。健肽风味速肥散的添加对育肥猪的胴体参数和肉质也有显著的影响（P〈0．05）．与对照组相比，屠宰率无明显差异（P〉0．05），但试验组的瘦肉率和肌内脂肪含量分别提高了4．81％和4．5％（P〈0．05）．脂肪率、板油重和背膘厚分别降低了3．09百分点、0．28kg和0．45cm（P〈0．05）；添加0。6％健肽风味速肥散组的肉质嫩度、风味、多汁性和大理石纹也有明显改善（P〈0．05），失水率显著降低（P〈0．05），背肌蛋白含量和肌间脂肪含量也显著增加，总氨基酸含量和总氨基酸／蛋白质比例也显著提高（P〈0．05），有效地改善了育肥猪肉质。  相似文献   

4.
生长猪血液生化指标与生产性能及肉质的关系   总被引：17，自引：0，他引：17  
通过测定体重约50kg和90kg时雅南猪及其杂交后代长雅、约雅、汉雅、长杜雅（各20头）的血液生化指标，结果发现：随着年龄（体重）的增长，血清酶AKP和LDH活性变化较小（P＞0．05），血清总蛋白质和总胆固醇含量增加（P＜0．05），血液激素T3、T4含量降低（P＜0.01）。相关分析结果：90kg体重屠宰时AKP活性与日增重、饲料效率、瘦肉率和脂肪率的相关系数分另IJ为0．211、—0．286、0．231和—0．306（P＜0.01）；LDH活性与瘦肉率的相关系数为0．233（P＜005）；90kg作重时血清总胆固醇含量与瘦肉丰的相关和通径系数分别为—0．232和—0．131（P＜0．05）；90kg体重时血液生化性状与肉质性状间典型相关系数为0．536（P＜0．05），50kg体重血液生化性状与生产性能及肉质的相关相对较小。  相似文献   

5.
郭建凤  王继英  张印  武英 《养猪》2009,(3):25-27
研究测定了专门化品系ZFY猪肥育性能、胴体性能、肉质性状及背最长肌、腰大肌、后腿肉氨基酸、脂肪酸含量。结果表明,ZFY系猪30—100kg日增重818．87g,料重比2．40;胴体性能较高,肉质良好,屠宰体重103．43kg,胴体瘦肉率67．75％,肉色3．45、大理石纹3．45,pH6．60,肌内脂肪1．55％。每100g背最长肌、腰大肌及后腿肉的氨基酸总量和鲜味氨基酸含量都以背最长肌最高,分别比腰大肌和后腿肉提高2．70％（P〉0．05）和1．95％（P〉0．05）、1．03％（P〉0．05）和1．66％（P〉0．05）;必需氨基酸含量、鲜味氨基酸和必需氨基酸分别占氨基酸总量比例都以腰大肌最高,分别比背最长肌和后腿肉提高0．19％（P〉0．05）和0．66％（P〉0．05）、1．79％（P〉0．05）和1．50％（P〉0．05）、2．85％（P〉0．05）和1．42％（P〉0．05）。棕榈酸、硬脂酸、油酸和亚油酸4种脂肪酸含量3个部位间差异不显著。肌肉脂肪以后腿肉含量最高,分别比背最长肌和腰大肌提高91．94％（P〈0．05）、112．5％（P〈0．05）;肌肉蛋白质含量以腰大肌最高,分别比背最长肌和后腿肉提高0．22％（P〉0．05）、1．64％（P〉0．05）;肌肉干物质含量以后腿肉最高,比背最长肌和腰大肌分别提高5．19％（P〉0．05）、4．67％（P〉0．05）。  相似文献   

6.
高赖氨酸水稻;肉鸡;应用效果摘要：为研究不同比例高赖氨酸水稻替代玉米对肉用仔鸡生产、屠宰性能和部分血液生化指标的影响,选用150只1日龄AA肉鸡,分为3组,每组2个重复,每个重复25只鸡,分为前期（0～21d）和后期（22～42d）两个阶段饲养。对照组采用玉米一豆粕型日粮;试验组分别为高赖氨酸水稻替代40％、100％玉米组．分别在21日龄、42日龄测定各组肉鸡的生产性能、屠宰性能及部分血液生化指标。生长试验结果表明：前期高赖氨酸水稻替代40％玉米组肉鸡的平均日采食量、平均日增重、料重比与对照组差异不显著（P〉0．05）,高赖氨酸水稻替代100％玉米组肉鸡的平均日采食量、平均日增重与对照组差异不显著（P〉0．05）;后期高赖氨酸水稻替代40％玉米组和替代100％玉米组肉鸡的平均日采食量、平均日增重、料重比与对照组差异不显著（P〉0．05）。屠宰试验结果表明：前期试验组胸肌率有显著提高（P〈0．05）,全净膛率、腿肌率、腹脂率与对照组无显著差异（P〉0．05）;后期腿肌率有显著提高（P〈0．05）,全净膛率、腿肌率、腹脂率与对照组无显著差异（P〉0．05）。血液生化指标测定结果表明：前期对照组和试验组血液指标除碱性磷酸酶含量和总胆固醇含量有显著差异外（P〈0．05）,其他指标无显著差异（P〉0．05）;后期对照组和试验组各个血液指标间均无显著差异（P〉0．05）。结论：高赖氨酸水稻部分或完全代替玉米饲养肉鸡是可行的。  相似文献   

7.
糙米与玉米型饲粮对肉猪饲用价值比较研究   总被引：5，自引：0，他引：5  
研究了以糙米与玉米分别为主要能量饲料时,2种饲粮对生长育肥猪生产性能、消化代谢、胴体性状及肉品质的影响。结果表明,糙米与玉米型饲粮组生长育肥全期（29kg～90kg）平均日增重分别为715g、703g（P＞0．05）;料重比分别为3．17：1,3．19：1;糙米型饲粮的干物质、有机物质、无氮浸出物、总能的消化率比玉米型饲粮高,其差异达显著水平（P＜0．05）,粗蛋白质、粗脂肪消化率极显著高于玉米型饲粮组（P＜0．01）。糙米型饲粮氮沉积率较玉米型饲粮高22．7％、（P＜0．05）,能量代谢率显著高于玉米饲粮组（P＜0．05）。糙米型饲粮喂猪达上市体重时,其胴体性状及肉品质指标与玉米型饲粮差异不显著（P＞0．05）。  相似文献   

8.
植酸酶替代无机磷饲喂肉猪试验报告   总被引：6，自引：0，他引：6  
选择96头日龄、体重相近的断奶仔猪随机分成对照与试验2个组,每组48头,并设置3个重复（每个重复16头）。对照组与试验组营养水平相当,试验组添加500IU／kg浓度植酸酶替代日粮75％的磷酸氢钙进行为期90d的试验。结果表明：在肉猪日粮中添加500IU／kg的植酸酶替代75％的磷酸氢钙,可提高猪增重和降低饲料消耗（P＞0．05）;可降低Cu、Zn、Fe、Ca、P等有害微量元素的排放量,其中除P的排放量,试验组与对照组比较差异极显著外（P＜0．01）,其他指标均差异不显著（P＞0.05）;屠宰测定胴体性状试验组猪的屠宰率、眼肌面积、胴体瘦肉率、后腿比例均比对照组高,但差异不显著（P＞0．05）;肉质性状中肉色、失水率、贮藏损失明显优于对照组,其中肉色评分差异显著（P＜0.05;胫骨Ca、P含量差异不显著0＞0．05）。  相似文献   

9.
大蒲莲猪生长肥育性能和胴体及肉品质研究   总被引：2，自引：1，他引：1  
测定了山东省优良地方猪种大蒲莲猪的生长肥育性能、胴体品质和肉质特性。结果表明,试验猪25～90kg阶段平均日增重461．01g,料重比3．84;屠宰体重95．67kg,胴体瘦肉率42．24％;肉质优良,肉色和大理石纹评分分别为4．14、4．02,pH1为6．57,滴水损失较低为1．09％,肌内脂肪含量高为7．60％;大蒲莲猪每100g背最长肌胱氨酸含量较高,-9腰大肌差异极显著;必需氨基酸占氨基酸总量比例以腰大肌较高为41．23％,与背最长肌差异极显著;棕榈酸、油酸、肌内脂肪和干物质都以背最长肌含量较高,分别比腰大肌提高4．80％（P〈0．05）、21．71％（P〈0．01）、256．81％（P〈0．01）和15．29％（P〈0．01）;硬脂酸和亚油酸以腰大肌含量较高,分别比背最长肌高20．91％（P〈0．01）和68．23％（P〈0．01）。  相似文献   

10.
研究测定了鲁育大约克、杜洛克及长白猪生长肥育性能、胴体性能、肉质性状及背最长肌氨基酸、脂肪酸含量。结果表明,大约克、杜洛克及长白猪生长速度和饲料报酬差异不显著,达100kg活体瘦肉率长白猪最高,为65.22％,比大约克、杜洛克分别提高2．31％（P〈0．01）和2．48％（P〈0．01）。3个猪种胴体性能差异不显著,肉质性状差异显著。杜洛克肉色和大理石纹评分最高,滴水损失最低,肌内脂肪含量最高,肉质良好。每100g背最长肌氨基酸总量、鲜味氨基酸含量和必需氨基酸含量都以大约克最高,但3个猪种差异不显著;必需氨基酸占氨基酸总量比例也以大约克最高,且与长白猪差异显著,比杜洛克和长白猪分别提高0．94％（P〉0．05）和1．00％（P〈0．05）。棕榈酸、油酸和亚油酸含量3个猪种差异显著。棕榈酸和油酸含量都以大约克最高,分别比杜洛克和长白猪提高4．48％（P〉O．05）和16．73％（P〈0．05）、23．89％（P〈0．05）和56．19％（P〈0．01）,杜洛克油酸含量比长白猪提高26．07％（P〈0．05）;亚油酸含量长白猪最高,比大约克和杜洛克分别提高183．08％（P〈0．01）、63．94％（P〈0．01）。  相似文献   

11.
试验选用96头平均体重14.82 kg左右的杜×长×大断奶仔猪,随机分成4组,每组3栏,每栏8头(公母各半)。对照组饲喂基础日粮,试验1、2、3组分别添加1%80目白术、0.2%白术多糖和1%微米白术。试验期30 d。结果表明:在生长性能方面,与对照组相比,1%微米白术添加组可显著提高日增重(P0.05)、降低饲料增重比和腹泻率,而且效果优于1%80目白术组和0.2%白术多糖组,在肠道形态和肠道微生态区系方面,与对照组相比,日粮添加1%80目白术、0.2%白术多糖、1%微米白术均可不同程度的提高十二指肠和空肠的绒毛高度,加深十二指肠和空肠的隐窝深度,并且增加肠道微生态区系的多样性,其中以1%微米白术添加组的效果最佳。  相似文献   

12.
Sissay, M.M., Uggla, A. and Waller, P.J., XXXX. Prevalence and seasonal incidence of nematode parasites and fluke infections of sheep and goats in eastern Ethiopia. Tropical Animal Health and Production, XXXX. A 2-year abattoir survey was carried out to determine the prevalence, abundance and seasonal incidence of gastro-intestinal (GI) nematodes and trematodes (flukes) of sheep and goats in the semi-arid zone of eastern Ethiopia. During May 2003 to April 2005, viscera including liver, lungs and GI tracts were collected from 655 sheep and 632 goats slaughtered at 4 abattoirs located in the towns of Haramaya, Harar, Dire Dawa and Jijiga in eastern Ethiopia. All animals were raised in the farming areas located within the community boundaries for each town. Collected materials were transported within 24 h to the parasitology laboratory of Haramaya University for immediate processing. Thirteen species belonging to 9 genera of GI nematodes (Haemonchus contortus, Trichostrongylus axei, T. colubriformis, T. vitrinus, Nematodirus filicollis, N. spathiger, Oesophagostomum columbianum, O. venulosum, Strongyloides papillosus, Bunostomum trigonocephalum, Trichuris ovis, Cooperia curticei and Chabertia ovina), and 4 species belonging to 3 genera of trematodes (Fasciola hepatica, F. gigantica, Paramphistomum {Calicohoron} microbothrium and Dicrocoelium dendriticum) were recorded in both sheep and goats. All animals in this investigation were infected with multiple species to varying degrees. The mean burdens of adult nematodes were generally moderate in both sheep and goats and showed patterns of seasonal abundance that corresponded with the bi-modal annual rainfall pattern, with highest burdens around the middle of the rainy season. In both sheep and goats there were significant differences in the mean worm burdens and abundance of the different nematode species between the four geographic locations, with worm burdens in the Haramaya and Harar areas greater than those observed in the Dire Dawa and Jijiga locations. Similar seasonal variations were also observed in the prevalence of flukes. But there were no significant differences in the prevalence of each fluke species between the four locations. Overall, the results showed that Haemonchus, Trichostrongylus, Nematodirus, Oesophagostomum, Fasciola and Paramphistomum species were the most abundant helminth parasites of sheep and goats in eastern Ethiopia.  相似文献   

13.
Tropical Animal Health and Production -  相似文献   

14.
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   

15.
Our particular attention in this article was given to natural mediators for macrophages isolated from the sites of tissue injury. A number of chemotactic factors, which may satisfy many criteria making them acceptable as inflammatory leucocyte chemotactic factors, has been separated. Among them, our laboratory has isolated three macrophage (monocyte) chemotactic factors (MCF-a, -b and -c). Their purification, characterization and functional specificity are discussed.  相似文献   

16.
Human and equine athletes are reported to have a high prevalence of gastric disease, and anecdotal evidence suggests a similar phenomenon applies to racing sled dogs. To investigate the prevalence of gastric disease in racing sled dogs, we conducted 2 gastroscopy studies on dogs competing in the annual Iditarod Sled Dog Race. A pilot study of dogs that were either dropped from the 2000 Iditarod Sled Dog Race because of illness or that finished the race indicated that, approximately 5 days after competing, 10 of 28 dogs (35%) had endoscopic evidence of gastric ulceration, erosion, or hemorrhage. The next year, an endoscopic study of 73 dogs participating in the 2001 Iditarod race was performed in order to evaluate a larger population of dogs. Data from 70 of these dogs could be used; 34 (48.5%) had ulceration, erosion, gastric hemorrhage, or some combination of these findings. When this group of 70 dogs was compared retrospectively to a control group of 87 dogs presented to the Texas A&M University (TAMU) Veterinary Medical Teaching Hospital, the Iditarod sled dogs had a significantly higher prevalence (P = .049) of gastric lesions. These findings suggest that, similar to athletes of other species, elite canine athletes have an increased prevalence of gastric disease compared to the canine population at large.  相似文献   

17.
Genetic variations in chromosome Y are enabling researchers to identify paternal lineages, which are informative for introgressions and migrations. In this study, the male‐specific region markers, sex‐determining region‐Y (SRY), amelogenin (AMELY) and zinc finger (ZFY) were analysed in seven Turkish native goat breeds, Angora, Kilis, Hair, Honaml?, Norduz, Gürcü and Abaza. A SNP in the ZFY gene defined a new haplotype Y2C. All domestic haplogroups originate from Capra aegagrus, while the finding of Y1A, Y1B, Y2A and Y2C in 32, 4, 126 and 2 Turkish domestic goats, respectively, appears to indicate a predomestic origin of the major haplotypes. The occurrence of four haplotypes in the Hair goat and, in contrast, a frequency of 96% of Y1A in the Kilis breed illustrate that Y‐chromosomal variants have a more breed‐dependent distribution than mitochondrial or autosomal DNA. This probably reflects male founder effects, but a role in adaptation cannot be excluded.  相似文献   

18.
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   

19.
The objective of this report was to characterize 20-year changes in proportion of calcium oxalate (CaOx) calculi and struvite calculi in dogs, and associations with breed, age, and sex. In this retrospective study, results of analysis of urinary calculi from dogs were reviewed for specimens received between July 1, 1981, and December 31, 2001. Breed, sex, age, year of submission of the specimen, and mineral type(s) were analyzed statistically. CaOx or Struvite or both were contained in 18,966 of 20,884 (91%) specimens. For both sexes, a 20-year statistically significant increase was observed in the proportion of calculus specimens that contained CaOx. The increase in this proportion was greater in females (1% to 31%) than in males (18% to 82%). From 1998 to 2001, when proportions may have plateaued, the odds of specimens containing CaOx were markedly higher in 18 breeds, markedly lower in 5 breeds, and not significantly different in 13 breeds compared with crossbreds. For both sexes, a 20-year statistically significant decrease was observed in the proportion of calculus specimens that contained struvite. This decrease in proportion was greater for males (79-16%) than for females (97-68%). From 1998 to 2001, when proportions plateaued, the odds of calculi containing struvite were markedly lower in 20 breeds, markedly higher in 1 breed, and not significantly different in 15 breeds when compared with crossbreds. Breed, age, and sex were associated statistically with CaOx or struvite urolithiasis. In conclusion, there appears to have been a long-term increase in the proportion of specimens of canine urinary calculi that contain CaOx as well as a long-term decrease in the proportion of specimens of calculi that contain struvite for both male and female dogs. The rate of change appeared to begin leveling off in the period 1998 to 2001. The recent proportion of dogs with either CaOx- or struvite-associated urolithiasis may depend on breed, age, and sex, and on interactions among these 3 factors.  相似文献   

20.
<正>1.INTRODUCTION Ensuring transportation network security is one Of the most daunting challenges confronting homeland security agencies today.Significant research has been dedicated.To model and analyze the vulnerability of transportation systems,while notably fewer studies propose specific strategies for deploying defensive technologies to safeguard these systems.  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