把好“四关”提高幼兔成活率

1影响幼兔成活率的因素1.1发育最快的时期在饲养条件良好的情况下,日增重能达到20 ~ 45 g,生长最快,性腺发育也迅速,3 ~ 3.5月龄可达到性成熟。1.2肠胃消化力较弱刚刚断奶的幼兔,胃肠容量比较小,消化力也相当弱。但是由于生长较块,对营养的需求较大,因而食欲较旺盛,容易贪食而损害肠胃。     

农户如何养好泌乳期奶山羊

<正>一、奶山羊泌乳期的饲养1.泌乳初期。奶山羊的泌乳期一般为9～10个月。奶山羊分娩后,一般胃肠空虚,常感到饥饿,食欲渐趋旺盛,但消化力弱。此期日粮中养分供给不能满足产奶需要,并不能影响产奶量的上升,因     

母猪的产后投料技术要点

<正>为提高母猪的泌乳和仔猪的断奶重,除了合理搭配饲料,加强妊娠母猪的管理外,对母猪的投料也很重要。投料指标能直接影响仔猪的生长发育和母猪下次的发情配种。1前期(产后5～16天)投料母猪产后体质乏弱,消化力不强,一般产后5天才能恢复正常饮食。所以给产后母猪投料时要少给勤添,逐渐增加饲料供给。一般日喂3～4次,到第     

雏鹑饲养管理技术（上）

雏鹑指从出雏到21日龄的鹌鹑。在此期间，雏鹑的体质较差、消化力较弱、胆小怕惊，对多种疾病又较为敏感，尤其是刚出壳时体重只有7～8克，难于饲养管理，稍有闪失，就容易使雏鹑发生疾病甚至是死亡。     

雏鸡保温的调控措施

1 雏鸡的体温特点 雏鸡的生理特点：体温调节不完善，生长发育迅速，代谢旺盛．胃容积小，消化力弱，抗病力差，敏感性强，群居性强。初生雏的体温是39．41-39．62℃，比成鸡约低1．96℃。开食后体温逐步上升。至3周龄左右体温凋节机能趋于完善。     

Effect of Different Protein Levels on Nutrient Digestion Metabolism and Serum Biochemical Parameters in Calves

The current study has been performed to examine the effects of different dietary protein levels on the growth, nutrient digestion and absorption, as well as biochemical parameters in calves. Nine healthy newborn calves were selected, randomly divided into 3 groups and fed 3 milk replacers with different protein levels （18, 22, and 26%）, respectively. Five period-digestion-metabolism trials were taken between 12-20, 22-30, 32-40, 42-50, and 52-60 days after birth. All 3 groups showed a similar growth curve during 11 to 61 experimental days, however, the growth rate of the 22% crude protein （CP） group was 8.89% higher than that of the 18% CP group and 19.48% higher than that of the 26% CP group, respectively. The apparent digestibility of dry material （DM） declined gradually with age, whereas, the apparent digestibility of N, extract ether （EE） rose slightly. Compared to the 22% CP and 26% CP group, calves fed with 18% CP apparently had a lower digestibility than DM, EE, and nitrogen （N）. The average apparent digestibilities of N were 69.39, 75.36, and 74.55%, respectively. Both the apparent digestibility and retention of calcium （Ca） and phosphorus （P） were steady throughout the experiment, but the average apparent digestibility of P in the 26% CP group was only 63.83%, which was markedly lower than that of the 18% CP group （70.40%） and 22% CP group （69.73%）. In addition, the serum concentrations of total protein （TP）, albumin （ALB）, and globulin （GLOB） of the 22% CP group were higher than those in the 18% CP and 26% CP groups. The urea N （BUN） content in the 18% CP group, on the other hand, was significantly lower than that of the other two groups. The highest glucose （GLU） concentration was found in the 22% CP group （5.38 mmol L^-1）, at the end of the trials. The protein levels in the milk replacer affected the digestion metabolism of nutrition and the serum biochemical parameters of calves at different physiological phases. Calves fed with 22% CP milk     

肉用仔鹅的放牧技术

肉用仔鹅是指20～70日龄的幼鹅,消化器官逐渐发育,食量显著增加,消化力、抗病力和对外界环境的适应性增强,生长迅速,必须有足够的饲料来满足其营养需要。     

仔猪胃液酸度对消化力的影响及酸化剂的应用

阐述了猪胃内酸度变化对胃液消化力的影响，以及仔猪胃内酸度的发育特点，指出有必要在仔猪料中使用酸化剂，并分析了酸化剂的作用机制和应用实效。     

奶犊牛的『五·三』饲养法

1饲喂三定1.1定时饲养要固定次数和时间以提高犊牛的食欲和消化力。前2星期要少喂勤添,日喂乳4次,3~5星期日喂3次,6星期时日喂2次。1.2定量     

3种鱼对鱼粉酶解动力学及体外消化率的研究

采用体外消化法研究了3种肉食性鱼类长吻（鱼/危）、大眼鳜、斑点叉尾（鱼/回）对鱼粉的消化能力.试验结果表明,⑴3种鱼胃、肠道酶解氨基酸生成速度均以长吻（鱼/危）最大,其次为大眼鳜,再次为斑点叉尾（鱼/回）,且长吻（鱼/危）和大眼鳜之间没有显著差异 (t=1.136＜2.306=t0.05)肝胰脏酶解氨基酸生成速度则斑点叉尾略大于长吻和大眼鳜.⑵对鱼粉干物质总体离体消化率斑点叉尾（鱼/回）＞长吻（鱼/危）＞大眼鳜;而粗蛋白离体消化率长吻（鱼/危）＞大眼鳜＞斑点叉尾（鱼/回）.⑶相同或相近体重的长吻（鱼/危）、大眼鳜、斑点叉尾（鱼/回）消化道指数存在明显的差异,比肠重斑点叉尾（鱼/回）＞长吻（鱼/危）＞大眼鳜;比肠长以大眼鳜最小,长吻（鱼/危）、斑点叉尾（鱼/回）基本相近;比肝重和比胃重大眼鳜＞长吻（鱼/危）＞斑点叉尾（鱼/回）.从总体消化能力来看,长吻（鱼/危）和大眼鳜的消化能力与斑点叉尾（鱼/回）相近,证实了长吻（鱼/危）和大眼鳜人工养殖和配合饲料开发的可行性.