我要尽情地去爱

在很多不喜欢动物的人眼里,狗是一种低等动物,可他们根本不知道狗是怎样对待生活的。     

文昌鸡产蛋性能及蛋品质研究

本文就文昌鸡产蛋规律、种蛋品质进行研究.结果表明:文昌鸡开产后第7周前产蛋率快速上升,到开产后第7周或第8周,产蛋率到达最高峰,60%以上的产蛋率能维持15～18周,经过产蛋高峰期后,产蛋率缓慢下降,期间略有波动,说明文昌鸡的产蛋性能良好;文昌鸡55周龄蛋品质性状蛋重(EW)、蛋壳重(SW)、蛋壳厚度(ST)、蛋壳强度(SS)、哈氏单位(HU)、蛋形指数(SI)、蛋黄重(YW)、蛋黄颜色(YC)的测定结果平均值分别为49.00g、6.34 g、320.69μm、4.01 kg/cm2.70.02、1.31、16.45 g、6.13.     

中链脂肪酸的生物学功能及其在动物生产中的应用研究进展

中链脂肪酸(MCFAs)是一类含有6～12个碳原子的饱和脂肪酸.除了作为能源物质之外,MCFAs还具有改善肠道形态结构、提高动物生长性能、防治疾病、调节免疫以及抗菌等功能,因此具有作为抗生素替代品的潜力.本文简述了MCFAs的生物学功能和作用机制,并综述了其在动物生产中的应用研究进展,以期为MCFAs在畜牧业生产中应用...     

罗非鱼湖病毒病传入风险分析

为评估罗非鱼湖病毒（tilapia lake virus,TiLV）跨境传入风险,按照OIE传入风险评估框架,从危害识别、风险评估及风险管理3个方面,开展了TiLV跨境传入风险分析,并提出了相应的风险控制措施。分析认为：活的敏感鱼类（包括亲鱼、鱼卵和鱼苗）,用做鲜活饵料的鱼类（野杂鱼）及冰冻和冰鲜的敏感鱼类（包括去除内脏的鱼肉）TiLV传入风险较高,而敏感鱼加工类产品、非敏感鱼类（包括活的和其他形式的产品）及运输活鱼的水、包装、运输工具和用具等传入风险较低。建议不从疫区进口高风险产品,对于低风险产品可以自由贸易,而对运输活鱼的水、包装、运输工具和用具等要进行强制常规消毒。     

玉米花粉破壁的利弊

本文主要阐述了玉米花粉壁两个方面的问题。一是玉米花粉壁自身的营养价值,它对其内溶物的保护作用及玉米花粉壁是否影响人体对花粉内溶物的吸收;二是玉米花粉什么情况下需要破壁,其破壁的原因。     

日粮营养水平对奶牛乳蛋白合成的影响及其作用机理的研究进展

乳蛋白作为乳中重要的组成成分,含有人体所需的几乎所有必需氨基酸。然而,奶牛乳蛋白的合成受很多因素影响,如日粮组成、遗传因素、饲养环境等,但具体影响机制尚不明确。因此,研究乳蛋白合成机理,结合营养调控措施提高其在乳中的含量,成为目前研究的热点和重点。作者就目前日粮营养水平对奶牛乳蛋白合成的影响及其作用机理的研究进行了综述。     

管理方式对华北驼绒藜生长及种子产量、质量的影响

研究施肥、浇水等不同管理措施对华北驼绒藜生长及种子产量、质量的影响。结果表明,适宜的田间管理可以提高华北驼绒藜的株高、枝条数、种子产量和质量。其中3次施肥+喷钾增产增质效果优于其它处理。3次施肥为最佳施肥方式。浇水及喷施钾肥对促进华北驼绒藜营养生长和提高种子产量、质量没有明显的作用。     

华北驼绒藜种子发育期各器官间碳水化合物的再分配

对华北驼绒藜种子发育阶段的主要代谢“库”器官根、茎、果实进行了可溶性糖、淀粉和蔗糖酶的动态变化研究分析,确定其营养物质的流向及流量的大小,探索这一阶段碳水化合物的分配是否与种子低结实率有关。结果显示华北驼绒藜种子发育期间,根和茎中可溶性糖和淀粉的含量呈不断下降趋势,其中根中淀粉由盛花期到成熟期下降达48%,茎中下降幅度较小;同时这2个器官中蔗糖酶的活性也逐渐降低。果实中可溶性糖和淀粉含量呈逐渐递增的趋势,蔗糖酶活性也呈增大趋势。表明尽管根、茎通常是代谢的“库”器官,但在种子生长发育期间,根和茎转而成为 “源”器官,其大量同化物流向繁殖器官。但是从同化物的流量来看,多年生的华北驼绒藜根茎中同化物的输出比例远小于一年生的作物。     

Effect of system of feeding and watering on performance of lactating sows

An experiment was conducted to determine the effects of ad libitum access to feed and water and the option to mix feed and water, all in the same feeder, on the performance of multiparous lactating sows. Feed and water were made available to sows using a self-fed wet/dry (SFWD) or a hand-fed (HF) feed-water system. In the SFWD system, feed and water were dropped into a common trough area of the feeder. The sow determined when and how much of each was dropped. With feed falling onto the flat area of the bottom of the SFWD feeder trough and water falling into the shallow bowl area, and with the 2 areas seamlessly connected, the sow also determined the wetness of the feed consumed. In the HF system, sows were given dry feed twice daily in a J-shaped feeder that was independent of the sow's water source. Sows (n = 114) were assigned to treatments based on parity and genotype. Total feed disappearance per sow during lactation (20 +/- 0.2 d) was greater (P < 0.01) with the SFWD system than with the HF system (120 vs. 110 +/- 4.1 kg, respectively). The SFWD sows had greater (P < 0.01) BW gains during lactation than HF sows (6.2 vs. 0.6 +/- 1.85 kg, respectively). Backfat depth change during lactation did not differ (P = 0.37) between treatments. Likewise, percentage of sows displaying estrus by d 11 post-weaning did not differ (P = 0.51). Piglet weaning BW was greater (P < 0.01) with the SFWD system than with the HF system (6.63 vs. 6.12 +/- 0.22 kg, respectively). Sow average daily water intake and total feed wastage during lactation did not differ (P > 0.66) between treatments. However, sows with the SFWD system wasted less water (P < 0.01) than those with the HF system (15 vs. 232 +/- 12 L, respectively). From a commercial swine production perspective, the difference in waste water volume would result in a significant variation in costs associated with manure storage and distribution. In conclusion, use of a SFWD feed-water system in lactation, which provides sows choices of when to eat, how much to eat, and if dry feed should be mixed with water during consumption, enhances sow appetite, improves litter growth performance, and wastes less water than a HF feed-water system.     

一起未经检疫调运牲畜引发疫情的调查处理

1案情2003年3月23日锡盟正镶白旗改良站从通辽市科左后旗查金台牧场购入26头西门塔尔牛 (其中3头种公牛 ) ,用汽车从科尔沁区运抵锡盟正镶白旗羊场 ,并与2002年11月从通辽科左后旗查金台牧场购入的10头牛混群饲养。24日下午起 ,新购进牛陆续发病 ,至31日病牛已达26头 (新购和原购的牛都有 ) ,旗兽医站接到疫情报告后即派兽医人员到羊场调查情况 ,并采取了相应措施。兽医人员初步诊断为某一类病 ,于是向旗、盟畜牧局和政府上报疫情。并采取病料送自治区兽医站检验诊断 ,确诊为某一类传染病。2处罚经自治区动物防疫监督检验所调查取证 ,这是一…