共查询到20条相似文献，搜索用时 140 毫秒
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文章旨在评估羽扇豆完全替代豆粕对肉兔生长性能、盲肠发酵及经济效益的影响.试验将384只28日龄平均体重为986.39 g的肉兔随机分为2组,每组192只.两组肉兔在为期42?d的饲养试验中分别饲喂以12％豆粕和12％羽扇豆为主要蛋白原料的日粮.结果:豆粕组70?d肉兔体重、50～70?d平均日增重和28～49?d平均日... 相似文献
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文章旨在评估日粮添加不同水平的昆虫蛋白替代豆粕对肉鸡生长性能和肠道健康的影响.试验选择1日龄平均体重为(60.25±0.16)g的624只商品肉仔鸡,随机分为3组,每组8个重复,每个重复26只.T1～T3组肉鸡分别饲喂昆虫蛋白原料添加水平为0、8％和16％的日粮,试验持续42 d.结果:日粮昆虫蛋白添加水平对肉鸡体重、... 相似文献
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本研究评估了日粮添加昆虫蛋白粉(黄粉虫)替代豆粕对肉兔生长性能、养分消化及饲养成本的影响.试验选择平均体重为(712.16±0.37)g的60只肉兔,随机分为2组,每组5个重复,每个重复6只.对照组和处理组肉兔在整个为期8周的饲养试验中分别饲喂8％豆粕型和8％黄粉虫型基础日粮.结果:处理组肉兔12?w体重较对照组显著提... 相似文献
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文章旨在研究日粮添加不同蛋白原料(豆粕、葵花粕或羽扇豆)对生长育肥期肉兔生长性能、养分消化率及屠宰性能的影响。试验选择37 d断奶的肉兔120只,随机分为3组,每组4个重复,每个重复10只兔。试验设计3种日粮,日粮中蛋白原料分别是豆粕(10%)、葵花粕(17%)和羽扇豆(15%),试验共进行6周。结果:葵花粕组较豆粕和羽扇豆组有降低肉兔总能、酸性洗涤纤维和淀粉表观消化率的趋势(P=0.06,P=0.08,P=0.09),同时中性洗涤纤维显著低于其他两组(P<0.05)。豆粕组较葵花粕和羽扇豆组有提高其他挥发性脂肪酸含量的趋势(P=0.08),同时豆粕组有提高盲肠及其内容物相对重量的趋势(P=0.09,P=0.06)。与豆粕组和葵花粕组相比,羽扇豆组显著提高了盲肠乳酸含量(P<0.05)。葵花粕组较其他组显著提高了肉兔各阶段平均日采食量(P<0.05)。葵花粕组较羽扇豆组显著提高了59~79 d肉兔的死亡率(P<0.05)。羽扇豆组较豆粕组和葵花粕组显著提高了肉兔的屠宰率(P<0.05)。结论:羽扇豆是生长育肥肉兔饲料中较好的蛋白原料,可以完全替代饲料中的豆粕,对肉兔生长性能、屠宰性能以及养分消化、盲肠相关指标无负面影响。 相似文献
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为探讨玉米浆酶解蛋白质饲料替代豆粕对肉兔生产性能及血清生化指标的影响,采用单因子试验设计,选择"伊高乐"商品肉兔144只,按体重一致的原则随机分为4个处理,每个处理6个重复,每个重复6只,进行为期28 d的饲养试验,对照组(处理1组)饲喂主要蛋白来源为豆粕的基础饲粮,3个试验组分别饲喂用玉米浆酶解蛋白质饲料替代对照组中1/3豆粕(处理2组)、2/3豆粕(处理3组)和全部豆粕(处理4组)的试验饲粮,测定试验肉兔各项生长性能和血清生化指标。结果表明:玉米浆酶解蛋白质饲料替代豆粕对肉兔无不良影响,2/3替代可降低15～28 d采食量和料肉比,2/3～3/3替代可提高血清总蛋白和球蛋白水平,降低尿素氮含量,改善肉兔健康状况。说明玉米浆酶解蛋白质饲料替代配方中豆粕是可行的,替代2/3的比例较为适宜。 相似文献
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试验选用1日龄黄羽肉鸡320只,随机分为4个处理组,每个处理组4个重复.Ⅰ组为对照组,饲喂玉米-豆粕型基础饲粮,试验Ⅱ、Ⅲ、Ⅳ组在对照日粮基础上,分别用脱酚棉籽蛋白替代30％、60％、100％的豆粕,在饲粮中的添加量前期(0～3周龄)分别是8.87％、17.70％、29.5％,后期(4～7周龄)分别是8.19％、16.37％、27.2％.试验周期为49 d,观察脱酚棉籽蛋白对黄羽肉鸡生产性能、屠宰性能和血液指标的影响.结果表明:在保证饲粮代谢能、粗蛋白、赖氨酸和蛋氨酸水平相当的情况下,以脱酚棉籽蛋白部分或全部替代豆粕,可以获得黄羽肉鸡在玉米-豆粕型常规饲粮条件下的生长效果,且对屠宰性能、血液指标没有明显的负面影响. 相似文献
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文章旨在评估饲料添加不同水平百香果籽提取物对肉兔生长性能、肉品质及抗氧化指标的影响.试验将144只50?d平均体重为(668.38±1.55)g的肉兔随机分为3组,每组4个重复,每个重复12只肉兔.在为期7周的饲养期间,对照组肉兔饲喂基础日粮,T1和T2组肉兔分别饲喂基础日粮+100和200?mg/kg百香果籽提取物.... 相似文献
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文章旨在评估日粮添加不同植物蛋白原料对肉鸡生长性能、血清生化指标及盲肠微生物含量的影响。试验将1日龄、平均体重为（60.74±0.35）g的720只肉鸡随机分为4组,每组5个重复,每个重复36只。对照组饲喂玉米～豆粕型基础日粮,处理组日粮分别用5%芽孢杆菌发酵豆粕（T1）、乳酸杆菌发酵豆粕（T2）和大豆浓缩蛋白（T3）替代豆粕。结果：T1和T2组21和42?d肉鸡的体重显著高于对照组（P＜0.05）,同时,T1组1～21?d和1～42?d肉鸡的平均日增重显著高于对照组（P＜0.05）。在1～21?d时,T1和T2组饲料报酬较对照组分别显著提高6.50%和6.11%（P＜0.05）,而整个试验期（1～42?d）,T1组饲料报酬较对照组显著提高2.55%（P＜0.05）。与对照组相比,T1组胸肌相对重量显著提高7.78%（P＜0.05）。T2和T3组肉鸡盲肠细菌总数显著高于对照组和T1组（P＜0.05）,而T1和T2组盲肠乳酸杆菌数量显著高于对照组和T3组（P＜0.05）,但大肠杆菌数量显著降低（P＜0.05）。与对照组相比,处理组盲肠芽孢杆菌数量分别显著提高19.62%、22.05%和20.49%（P＜0.05）。结论：生长早期日粮用5%发酵豆粕替代豆粕可以改善肉鸡日增重,促进盲肠有益微生物的生长,有利于肉鸡整个生长阶段的饲料效率。
[关键词]植物蛋白|肉鸡|生长性能|血清生化|盲肠微生物 相似文献
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为研究肉兔基础日粮中添加不同比例黄秋葵粉对肉兔屠宰性能、免疫性能和抗氧化性能的影响,试验选用35日龄健康新西兰肉兔120只,随机分成5组,每组3个重复,每个重复8只,预试期7 d,正试期28 d,试验Ⅰ、Ⅱ、Ⅲ、Ⅳ组分别在基础日粮中添加1％、2％、3％及4％黄秋葵粉.结果表明:与对照组相比,试验Ⅱ、Ⅲ组屠宰体重提高6.... 相似文献
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Nadine Pa?lack Barbara Mainzer Monika Lahrssen-Wiederholt Helmut Schafft Richard Palavinskas Angele Breithaupt Jürgen Zentek 《Journal of veterinary science (Suw?n-si, Korea)》2015,16(1):57-66
This study was conducted to measure the concentrations of strontium (Sr), barium (Ba), cadmium (Cd), copper (Cu), zinc (Zn), manganese (Mn), chromium (Cr), antimony (Sb), selenium (Se), and lead (Pb) in canine liver, renal cortex, and renal medulla, and the association of these concentrations with age, gender, and occurrence of chronic kidney disease (CKD). Tissues from 50 dogs were analyzed using inductively coupled plasma mass spectrometry. Cu, Zn, and Mn levels were highest in the liver followed by the renal cortex and renal medulla. The highest Sr, Cd, and Se concentrations were measured in the renal cortex while lower levels were found in the renal medulla and liver. Female dogs had higher tissue concentrations of Sr (liver and renal medulla), Cd (liver), Zn (liver and renal cortex), Cr (liver, renal cortex, and renal medulla), and Pb (liver) than male animals. Except for Mn and Sb, age-dependent variations were observed for all element concentrations in the canine tissues. Hepatic Cd and Cr concentrations were higher in dogs with CKD. In conclusion, the present results provide new knowledge about the storage of specific elements in canine liver and kidneys, and can be considered important reference data for diagnostic methods and further investigations. 相似文献
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Breed differences for weight (CW), height (CH), and condition score (CS) were estimated from records (n = 12,188) of 2- to 6-yr-old cows (n = 744) from Cycle IV of the U.S. Meat Animal Research Center's Germplasm Evaluation (GPE) Program. Cows were produced from mating Angus and Hereford dams to Angus, Hereford, Charolais, Shorthorn, Galloway, Longhorn, Nellore, Piedmontese, and Salers sires. Samples of Angus and Hereford sires were 1) reference sires born from 1962 through 1970 and 2) 1980s sires born in 1980 through 1987. The mixed model included cow age, season of measurement and their interactions, year of birth, pregnancy-lactation code (PL), and breedgroup as fixed effects for CW and CS. Analyses of weight adjusted for condition score included CS as a linear covariate. The model for CH excluded PL. Random effects were additive genetic and permanent environmental effects associated with the cow. Differences among breed groups were significant (P < 0.05) for all traits and were maintained through maturity with few interchanges in ranking. The order of F1 cows for weight was as follows: Charolais (506 to 635 kg for different ages), Shorthorn and Salers, reciprocal Hereford-Angus (HA) with 1980s sires, Nellore, HA with reference sires, Galloway, Piedmontese, and Longhorn (412 to 525 kg for different ages). Order for height was as follows: Nellore (136 to 140 cm), Charolais, Shorthorn, Salers, HA with 1980s sires, Piedmontese, Longhorn, Galloway and HA with reference sires (126 to 128 cm). Hereford and Angus cows with reference sires were generally lighter than those with 1980s sires. In general, breed differences for height followed those for weight except that F1 Nellore cows were tallest, which may in part be due to Bos taurus-Bos indicus heterosis for size. 相似文献
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In experiment 1, 6 pregnant mares received a concentrate that contained a trace mineral premix that provided 14.3 mg Cu, 40 mg Zn, 28 mg Fe, 28 mg Mn, 0.08 mg Co, 0.16 mg I, and 0.16 mg Se/kg concentrate (group A). Seven mares received the same concentrate plus 502 mg Zn and 127 mg Cu once daily (group B). No differences (P > .05) in foal growth data, or Cu, Zn, and Fe concentrations of mare milk, mare serum, or foal serum were observed. In experiment 2, 6 pregnant mares received the same concentrate as group A (group C), and 8 mares received the same concentrate fortified with 4× the trace mineral premix (group D). Group C mares had higher serum Zn concentration at 1 day (P < 0.01) and 56 days (P < 0.04). Group C mares had higher milk Fe concentration at 28 days (P < .01), and group D mares had higher milk Cu concentration at 56 days (P < .01). Group C foals had higher serum Cu concentration at 14 days (P < .03). The results from this study provide no evidence to indicate that supplementing late gestating and lactating mares with higher dietary trace mineral levels than those recommended currently by NRC has any influence on foal growth and development, or on the Cu, Zn, and Fe concentrations of the mare milk, mare serum, or foal serum. 相似文献
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《饲料工业》2019,(18):54-58
应用电感耦合等离子-质谱技术(ICP-MS),建立饲料中钠、镁、铬、锰、铁、铜、锌、砷、硒、镉和铅等元素的测定方法。对饲料样品的前处理方法、仪器工作参数和11种元素标准曲线进行优化;并以加标回收、分析方法比对和重复测试说明方法的准确性和精密性。方法在0～1 000 ng/ml范围内线性良好,仪器检出限为0.557 7～5.072 ng/ml,具有良好的精密度,其回收率在88.1%～104.4%之间,相对标准偏差小于5.0%。同时与原子吸收和原子荧光方法进行比对,测定结果相近。所建立的方法简单、快速,可替代原子吸收和原子荧光方法测定饲料中的11种金属元素,为饲料的质量控制提供理想的元素分析方法。 相似文献
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K Reifenberg M Stahl U L?sch 《Zentralblatt für Veterin?rmedizin. Reihe B. Journal of veterinary medicine. Series B》1989,36(3):191-198
A simple two step procedure for the isolation of caprine, ovine, bovine, equine, canine, porcine and human peripheral blood granulocytes is described. After enrichment of granulocytes by centrifugation, contaminating erythrocytes are lysed hypotonically. Recovery, purity, and viability of the granulocyte suspensions are determined. FACScan analysis of the cell suspensions measuring cellular size by forward and sideward light scatter is compared with the corresponding analysis of whole blood leukocytes. Constituencies of the isolated cell suspensions and loss of granulocyte subpopulations through isolation procedure is discussed with regard to granulocyte function assays. 相似文献
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《The Journal of Applied Poultry Research》2017,26(2):295-306
The present context investigated the comparative study on the supplementation of antibiotic, probiotic, organic acid, vitamin C, and herbal extract after vaccination into drinking water and their effects on performance, carcass quality, blood biochemical parameters, immune system, and intestinal flora in broiler chicks for 42 days. A total of 420 one-day-old male broiler chicks (Ross 308) were randomly assigned into 7 treatments with 3 replicates (pens) per treatment and 20 male chicks for each replicate (pen). The experimental treatments consisted of drinking water (control, without additive); drinking water + antibiotic sulfamet; drinking water + C-Vet-50; drinking water + antibiotic sulfamet + C-Vet-50; drinking water + probiotic Primalac; drinking water + butyric acid; and drinking water + extract of Echinacea purpurea Moench (coneflower). There were no differences observed among the treatments for feed intake, but during the whole experimental period, the highest body weight gain was found in the chicks fed with drinking water + antibiotic sulfamet + 50 cc vitamin C (P < 0.05). There were no differences (P > 0.05) observed among the treatments for feed conversion ratio (P > 0.05). Moreover, there were no differences reported among treatments for carcass characteristics at the end of the experiment. Among the treatments, drinking water + 50 cc vitamin C, and drinking water + extract of E. purpurea reduced (P < 0.05) the levels of cholesterol, triglycerides, and low-density lipoproteins. Drinking water + 50 cc vitamin C, drinking water + Primalac, and drinking water + extract of E. purpurea increased (P < 0.05) the lymphocytes count and decreased the heterophils count and heterophil:lymphocyte ratio. The highest Escherichia coli count and lowest Lactobacillus count in ileal content of the broilers were observed in the control group (P < 0.05). The additives used in this study may be incorporated in the drinking water of broiler chickens as growth promoters and for improved performance. A further, wider supplementation study is required to understand the performance, immune system, variation in the intestinal microbial counts, and any other possible alteration in the intestinal biota of the broilers. 相似文献
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《The Journal of small animal practice》1975,16(1-12):143-154
Circular excised skin wounds in the thoracic and metatarsal regions of the dog were studied. A similar sequence of events took place in the two regions although differences did occur due to the different reactions of the tissues which surrounded the wounds. None of the wound cavities became filled with exudate during the early stages of healing. In the thoracic wounds the cavities were largely filled by the swelling and inward movement of adipose tissue. Epithelium first grew on the wound surface in the sector of the wound that was situated in the direction of hair flow. The average time to complete epithelization was similar in both sets of wounds. A zone of alopecia developed around the wounds. 相似文献