颗粒饲料喂蛋鸡效益好

颗粒饲料是配合饲料生产中普遍采用的一种料形。在西欧,颗粒饲料的生产占全部配合饲料的60％以上。近年来,随着我国饲料工业的发展,颗粒饲料的比重也在增加。 颗粒饲料与粉状饲料相比,优点是:减少采食过程的浪费;便于贮存、包装和运输;动物采食过程中的能量消耗少;由于制粒过程中蒸气和压力的作用,提高了饲料的消化吸收率。因     

饲料加工方法对家禽生产性能影响

追溯到２０世纪３０年代初期,颗粒饲料的应用就作为改善家禽饲料的一种措施。往往有这种情况,许多人起初把颗粒饲料看做是掩饰不适于作湿粉状饲料成分的一种手段。据估计,迄今全部家禽饲料的一半以上是颗粒饲料。在许多肉用鸡的生产地区,颗粒饲料的百分比要高得多,并且在某些情况下多半会超过９７％。１压粒的效益家禽营养学家们和肉用鸡生产者们一致认为,肉用鸡配合饲料的压粒,在增重率和饲料利用效率方面都有所提高。家禽营养学家们更多地关注技术方面,并将指出收益的大小取决于颗粒饲料的配方种类。同很稠的湿粉状配合饲料比较,…     

颗粒饲料的饲养与经济效益

<正> 颗粒饲料是饲料产品形态中普遍采用的一种料形。在美国,颗粒饲料约占全部配合饲料的40～50％;在西欧,约占60％以上。我国一些饲料工业发展较快的地区,颗粒饲料的比重也在增加。与粉料相比较,颗粒饲料的优点是: ①可以减少畜禽采食饲料过程中的浪费。由于饲槽结构不合理,尤其是装料过满,畜禽来食粉料时,常常将饲料散落,由此造成的损失十分可观。用粉料饲喂鱼、虾的浪费更大,而且会导致水质污染。颗粒饲料可以大大减少     

成年水貂配合颗粒饲料择优试验

选择 1 6只成年水貂 (公母各半 )随机分为 4组 ,分别利用 DN- 1号、DN- 2号水貂配合颗粒饲料、日产水貂颗粒饲料和常规鲜饲料进行消化代谢试验。结果表明 :利用配合颗粒饲料喂成年水貂是可行的。受试水貂对颗粒饲料营养物质、能量的消化率、氮沉积率等多项指标均优于常规鲜饲料 ,而且饲料成本也相对降低。     

影响饲料制粒工艺效果的因素

颗粒饲料是一种由全价配合粉料或单一原料(如牧草和饼粕等)经挤压作用而制成的粒状饲料。颗粒饲料虽然制造成本较高,但是经过大量的畜禽饲养试验,证明它的饲喂效果有明显的经济效益。近年来,随着饲料工业的飞速发展,颗粒饲料已逐渐被广大养殖户所接受,且用量有继续增长的趋势。     

颗粒饲料在养畜业中的应用(综述)

国外配合饲料的生产,目前正逐渐淘汰粉状饲料,而向颗粒化发展。有些国家生产颗粒饲料已占到全部配合饲料产量的50～60%。在美国使用颗粒饲料占到55％以上,其中饲喂肉用仔鸡占95％以上。在苏联的配合饲料工厂,还设有颗粒饲料车间。     

畜牧机械设备系列讲座压粒机

配合饲料按其形态分为粉状和颗粒状两种.颗粒状饲料迅速发展原因是:颗粒饲料在装卸和搬运过程中不会因各种成分的比重不同破坏其均匀状态;能够避免畜禽捡食,保证全价喂饲;体积小,便于运输;吸湿性小,便于贮存;流动性好,便于实现机械化;粉尘小,损耗少,可以节省饲料. 但是把配合粉料加工成颗粒饲料,就要增加每单位饲料的成本,包括电耗成本、人工、机械折旧等.因此,选择性能良好的压粒机,是发展颗粒饲料的重要条件.压粒机按构造主要有两种:环模式及平模式. 　　……     

在年水貂配合颗粒饲料择估试验

选择１６只成年水貂（公线各半）随机分为４组，分别利用ＤＮ－１号、ＤＮ－２号水貂配合颗粒饲料、日产水貂闰饲料和常规鲜饲料进行消化代谢试验。结果表明：利用配合颗粒饲料喂成年水貂是可行的。受试水貂对颗粒饲料营养物质能量的消化率、氮沉积率等多项成于常规鲜饲料、而且饲料也相对降低。     

鸡粪加工成鱼饲料

正晒干的鸡粪含蛋白质40%,是养鱼的好饲料,更是鱼用配合颗粒饲料的理想原料。但生鸡粪中含有寄生虫卵及一些有毒物质和病菌,所以不能直接喂鱼。鸡粪配合饲料以处理好的干鸡粪为主(占50%左右),再搭配一定比例的玉米粉、豆饼、菜籽饼和麸皮等,混合搅拌后加工成颗粒饲料,每50 kg鸡粪颗粒饲料的成本仅在15元左右。用这种颗粒饲料喂鱼、鲫、鲤,鱼的饲料成本只有0.15~0.20元/kg。而目     

成年警犬用颗粒饲料饲喂的效果

犬用颗粒饲料是一种膨化、干燥的配合饲料料型.国外早在五十年代后期就已研制成功并推广使用,如今已成为犬的主要饲料。近年来,国内一些单位也开始了这方面的研究,并取得了初步成功.我们从1984年起,正式研制成年警犬颗粒饲料,并对生产加工工艺、饲料配方等进行了研究。为了检验颗粒饲料的饲喂效果,探讨颗粒料取代常规料(即大米、牛肉、奶粉等混合蒸煮的饲料)的可行性,给颗粒饲料以科学评价,我们于1985年底至1986年初,用颗粒料同常规料进行了饲喂对比试验,对表观消化率、经济效益、体重、粪便及食欲等进行了全面比较。现报告如下:     

浅析当前畜禽调运工作中存在的问题及对策

1 当前畜禽调运中存在的问题 1．1 调运户动物防疫意识不强 一是个别调运户未申领《动物防疫合格证》，没有动物防疫知识和相关法律法规知识．是违规调运的根源．     

Anaesthesia and analgesia of the donkey and the mule

The number of donkeys and mules throughout the world is stable, and awareness of their use and concern for welfare, pain recognition and treatment are receiving increasing veterinary interest. Therefore, accurate information about anaesthesia and analgesia in donkeys and mules is important to ever more equine practitioners. Since donkeys are physiologically and pharmacologically different from horses, knowledge on species specific aspects of anaesthesia and analgesia are very important. Mules combine elements from both donkey and horse backgrounds, leading to great diversity in size, temperament and body type. Physiologically, they seem to resemble horses more than donkeys. This review highlights the current knowledge on various anaesthetic and analgesic approaches in donkeys and mules. There is still much information that is not available about donkeys; in many circumstances, the clinician must use available equine information to treat the patient, while monitoring carefully to observe for differences in response to therapy compared to the horse.     

貉,蓝狐,银狐的胃及十二指肠内嗜银细胞形态分布的研究

本文应用Ｆｏｒｔａｎａ—Ｍａｓｓｏｎ嗜银颗粒染色法研究了貉、蓝狐、银狐的胃及十二指肠内嗜银细胞的形态分布。结果表明：三种动物胃幽门腺中，嗜根细胞数量最多，呈锥状，嗜银颗粒较粗，密度大、染成深黑色。在胃底及胃贲门腺区、嗜银细胞数量少。在十二指肠部嗜银细胞呈蝌蚪形，嗜银颗粒细，呈黑褐色，密度较小。嗜银细胞的分布密度在三种动物中具有一定的差别。     

Comparative ventilation and gas exchange in the horse and the cow

Ventilation and gas exchange were studied in healthy, adult horses and cows, two large species with different lung structures and different breathing patterns. The oxygen uptake (VO2), carbon dioxide output (VCO2), respiratory rate (fR), minute ventilation (VE), alveolar ventilation (VA), alveolar oxygen pressure (PAO2), and VE/VO2 ratio were higher in the cows, while the tidal volume (VT) and physiological dead space (VD) were larger in the horses. The arterial blood gases, alveolar-arterial oxygen pressure difference (PAO2-PaO2) and VD/VT ratio did not differ between the two species. The higher VO2 in the cows was most likely due to the energy cost of standing, and possibly to a higher cost of digestion. The higher VE, VA, VE/VO2 and PAO2 were most likely secondary to the increased VO2 and the slightly higher respiratory exchange ratio (R) in the cows. In contrast to hypotheses based on allometric equations, the PAO2 of horses and cows did not appear to differ from that of smaller mammals. The VD was larger than that predicted from allometric equations, and even though the VD/VT ratio (0.50) was lower than the previously reported values for horses and cows, it was significantly larger than the predicted weight-independent value of 0.36. Re-examination of the data used to derive the equation for VD raised questions as to the validity of this equation, and it is suggested that caution be exercised in the use of allometric equations for prediction.     

The relation between the birth process and the condition of the newborn piglet and calf

Fluxes of the anti-parasitic agents, [³H]-ivermectin, [³H]-selamectin and [³H]-moxidectin were studied across non-transfected and transfected canine kidney epithelial monolayers, MDCK II/wt, MDCK II-MDR1, MDCK II-MRP1 and MDCK II-MRP2. All four lines surprisingly expressed significant levels of P-glycoprotein (P-gp), coded for by MDR1, but MDCK II-MDR1 expressed increased levels compared to the other lines. MDCK II-MRP1 and MDCK II-MRP2 expressed increased levels of MRP1 and MRP2 respectively. Fluxes of [³H]-ivermectin, [³H]-selamectin, [³H]-moxidectin, and the P-gp substrates, rhodamine-123 and DiOC₂, were polarized in the basolateral-to-apical (secretory) direction across the four lines. Selected MRP inhibitors used in relevant pharmacological concentrations did not block the secretory fluxes of either [³H]-ivermectin or [³H]-selamectin in either the non-transfected or MRP-transfected lines. In contrast, secretory fluxes of ivermectin and selamectin were inhibited in all four lines by the P-gp inhibitor, verapamil. These data confirm that ivermectin and selamectin are substrates for P-gp in four additional cell lines, but suggest that they are not significant substrates for MRP1 or MRP2 where there is background expression of P-gp. Since this pattern of expression also pertains on the blood-brain barrier, it is unlikely that MRP1 and MRP2 play a significant role in ivermectin and selamectin blood: brain distribution in vivo.     

东西方蜜蜂越冬期过冷却点的测试及过冷却点与越冬性能的关系

针对越冬期东西方蜜蜂的过冷却点进行了测试并对其与越冬性能的关系进行了分析。结果发现:在越冬期,东西方蜜蜂存在过冷却点且二者差异显著,东方蜜蜂过冷却点明显低于西方蜜蜂,蜜蜂的过冷却点与其越冬性能密切相关。