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1.
饲粮氨基酸水平对生长期固始白鹅生长性能影响   总被引：3，自引：0，他引：3  
本试验选取30日龄健康固始白鹅雏鹅162只，雌雄各半，随机分成9组，每组3个重复，每个重复6只。采用3×3三因素正交试验设计．研究30～60日龄固始自鹅对赖氨酸、蛋氨酸和苏氨酸的需要量。其中赖氨酸含量为0．75％、9．0％、1．05％；蛋氨酸为0．38％、0．48％、0．58％；苏氨酸为0．60％、0．70％、0．80％。结果表明．不同的赖氨酸、蛋氨酸和苏氮酸水平对固始白鹅的生长性能影响差异显著（P〈0．05）。当日粮中赖氨酸含量为0．90％、蛋氨酸含量为0．48％、苏氨酸含量为0．60％时，固始白鹅生长性能最佳。  相似文献   

2.
为了探索竹鼠的人工配合饲料，采用火焰原子吸收法对人工驯养的竹鼠与野生竹鼠肌肉、心脏、肝脏、肾脏内几种微量元素进行测定分析。结果表明：肌肉中Cu、Co含量差异显著（P〈0．05），Cr含量差异极显著（P〈0．01）。心脏中Co、Cr含量差异显著（P〈0．05）。肾脏中se含量差异显著（P〈0．05），Mn含量差异极显著（P〈0．01）。肝脏中Cr，Co含量差异显著（P〈0．05）。人工驯养竹鼠组与野生竹鼠组肌肉、心脏、肾脏、肝脏其他微量元素含量差异不显著。  相似文献   

3.
程嘉翎  肖龙云  张波 《蚕业科学》2006,32(4):577-579
改善桑叶茶的品质,有望促进桑树资源的综合利用,为此研究了外源硒对桑叶中硒及若干化学成分含量的影响分别对3组桑苗施用0．25、0．5、1．0mg/L Na_2seO_3溶液,并以蒸馏水作为对照,培养1个月后的调查测定结果表明：施用亚硒酸钠的浓度与桑叶中的硒含量成正相关,其中1．0mg/L Na_2seO_3处理组桑叶中的硒含量最高,与对照相比差异达显著水平,桑叶鲜物质中硒的含量由0．39μg/g上升到5．36μg/g;0．25、0．5mg/L Na_2SeO_3处理组桑叶中的氨基酸、可溶性蛋白、可溶性多糖以及桑叶黄酮类成分含量均高于对照组和1．0ng/L处理组。  相似文献   

4.
选择5头体重相近,体质外貌相似,生产性能相近,日产奶量为15 kg左右的健康 牛。在气温为10℃以下、10-20℃、20-30℃、30-40℃左右维持15 d,分别采取试验牛的血、 乳和毛样,经消化处理后,研究不同气温对其影响情况,结果表明,气温达20℃以上,牛血液中 Zn含量开始下降,当气温达30-40℃,牛全血中Zn含量最低(P<0．01),Fe浓度明显下降(P <0．05),Cr含量急剧减少(P<0．011),Cu、Mn、Co的含量增加、Se含量有减少,但差异不显著 (P>0．05)。环境温度升高可明显增加乳中Zn、Fe含量(P<0．01),同时,Se、Cr、Mn含量也增 加,Co的含量减少(P<0．05),Cu含量变化无规律。环境温度对毛中Zn、Fe、Cu无规律性影 响,但环境温度升高,Se、Mn含量增加,Cr、Co含量减少(P<0．05)。  相似文献   

5.
本试验选取1日龄健康的合浦雏鹅270只,随机分成9组,每组3个重复,每个重复10只,公母鹅各一半,采用3×3三因素正交试验设计,来确定0～4周龄肉仔鹅赖氨酸、蛋氨酸和苏氨酸的需要量。日粮中赖氨酸、蛋氨酸和苏氨酸含量分别为：赖氨酸各个水平为：0．85％、1．00％、1．15％;蛋氨酸各个水平为：0．35％、0．45％、0．55％;苏氨酸各个水平为：0．55％、0．65％、0．75％。实验结果表明,不同的赖氨酸、蛋氨酸和苏氨酸水平,对鹅的生长性能和血清生化指标有显著影响（P〈0．05）。以增重和料重比为衡量指标,当日粮中赖氨酸含量为1．00％、蛋氨酸含量为0．45％、苏氨酸含量为0．55％时,合浦肉仔鹅生长性能最佳。  相似文献   

6.
陈卢亮  李静 《中国奶牛》2011,(11):54-57
本试验以紫花苜蓿为研究材料,探讨添加发酵抑制剂对其乳酸菌数量和青贮品质的影响,试验设置了对照、甲酸（0．5％、0．8％）、丙酸（（）．5％、0．8％）、Silo guard（0．05％、0．1％）7个处理,调制青贮饲料,30d后开封并取样分析。结果表明,添加剂甲酸和丙酸（0．5％、0．8％）在一定程度上抑制了紫花苜蓿青贮饲料乳酸菌（LAB）的生长繁殖,乳酸含量较低,但pH值、氨态氮占总氮比例（NH3-N／TN）、丁酸含量均显著低于对照组（P〈0．05）,明显改善了紫花苜蓿青贮饲料的发酵品质。发酵抑制剂Silo guard（0．1％）也使pH值和丁酸含量显著下降（P〈0．05）而对乳酸含量没有明显影响。  相似文献   

7.
半乳甘露寡糖对犬营养消化率和肠道主要菌群的影响   总被引：1，自引：0，他引：1  
李桂伶 《饲料广角》2011,(16):30-32
本研究旨在评估半乳甘露寡糖（GGMO）对犬营养消化率和肠道菌群的影响。本试验犬分为6个日粮组．分别用0、0．5％、1％、2％、4％和8％的GGMO代替纤维素。结果显示,随着犬13粮中GGM0的增加,犬日粮中DM和OM的消化率也呈线性增加趋势（P〈0．001）,而日粮中CP的消化率呈线性下降趋势（P〈0．001）;犬粪样中醋酸、丙酸和总短链脂肪酸的含量也呈现线性增加趋势（P≤0．001）．而丁酸的含量呈线性下降趋势（P≤0．001）。随着犬日粮中GGMO含量的增加,犬粪样中pH值有所下降（P≤0．001）．而粪样评分分数呈现明显二次方增加趋势（P≤0．001）：粪样中吲哚（P≤0．01）和苯酚（P≤0．05）含量呈线性下降趋势：随着犬日粮中GGMO含量增加而粪样中的苯乙胺有所下降外．各处理组中犬粪样中的其他生物胺的含量差异不显著（P〈0．001）。各处理组中犬粪样中的大肠杆菌、乳酸杆菌、产气荚膜梭菌的含量差异不显著;而随着犬日粮中GGMO含量增加．粪样中的双歧杆菌的含量呈现明显的二次方增加趋势（P≤0．01）。总的来看,半乳甘露寡糖是犬的一种优质日粮来源。  相似文献   

8.
马铃薯又称土豆、山药蛋、洋山芋。马铃薯含有一种毒素叫龙葵素（亦称马铃薯素或茄碱）。马铃薯各部分中龙葵素的含量不同,绿叶中为0．25％,芽内为0．5％,花内为0．7％,果实内为1％,马铃薯外皮内为0．01％,成熟的块根内为0．004％,如果将发芽的块根放在太阳下,块根内龙葵素的含量可增到0．08％～0．5％,芽内增到4．76％,霉败的马铃薯龙葵素含量一般可达0．58％-1．34％。  相似文献   

9.
青海省大通县牛肉、羊肉中的部分微量元素检测分析   总被引：1，自引：0，他引：1  
采用原子吸收分光光度计检测了33份大通县生产销售的牛肉和羊肉中的铜、锰、铬、锌含量。结果发现,牛肉中的铜含量2．22 mg/kg ,显著地低于羊肉中的1．38 mg/kg ;牛肉中的锌含量22．06 mg/kg ,显著地低于羊肉中的28．73 mg/kg ;牛肉中的锰含量0．224 mg/kg ,显著地高于羊肉中的0．117 mg/kg ;牛肉中的铬含量0．280 mg/kg ,显著地高于羊肉中的0．165 mg/kg。  相似文献   

10.
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   

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.
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   

18.
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   

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   

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