饲料企业如何培育核心竞争力

“核心竞争力是在一个组织内部经过整合了的知识和技能．尤其是关于怎样协调多种生产技能和整合不同技术的知识和技能。”这里的关键词是“整合”二字。核一心竞争力不是技术、不是人才、不是市场、不是企业家．而是通过企业的全体力量和各种因素共同整合的知识与技能。从本质上说,核心竞争力是一种协调力、组织力,是把不同的资源,包括有形的、无形的资源协调和整合起来,成功地进行生产运作的能力。它是一个企业集体的产物,是一个整体的概念,是不可分割的．同时也是其它企业难以模仿和复制的。     

酒石酸泰乐菌素的体外抗病原菌活性测定

本研究进行了国产酒石酸泰乐菌素在体外对几种常见病原自活性及最小抑菌浓度测定，并与进口酒石酸泰乐菌素进行对比。结果表明，国产酒石酸泰乐菌素对金黄色葡萄球菌，猪丹毒杆菌、多杀性巴氏杆菌、致病性大肠杆菌、鸡白痢沙门氏菌、嗜水气单胞杆茵和鸡败血支原体的ＭＩＣ（μｇ／ｍｌ）分别是４．８９，９．７７，９７．６６，１５６２．５，３１２５和０．０５，其中对鸡败血支原体最好，与有关文献报道基本一致，同时与进口酒石酸泰乐菌素有相似的抗菌谱及抗菌效力。     

北欧4种燕麦在果洛地区的引种栽培试验

在果洛拉加乡黄河谷地及西哈垄沟内,对引进的４种北欧燕麦进行的引种栽培试验结果表明：４种燕麦中ＹＴＡ较早熟,全生育天数１０４天;ＬＥＮＡ干草产量最高（４２３９９ｋｇ／ｈｍ２）;ＭＥＬＹＳ从籽实产量、茎叶比、营养成份等综合性状评价,都优于其它品种;ＮＥＯＮ的饲草品质最为优秀     

Effects of Yucca schidigera extract on growth performance and antioxidative function of small intestine in broilers

Dietary Yucca schidigera extract (YSE) could enhance immune function in broilers, which was attributed primarily to its saponin components. However, YSE also contains phenolic compounds which possess antioxidant ability. This study tested the effects of YSE on growth performance of broilers, its antioxidative enzyme activities and corresponding gene expressions in the small intestine. A total of 128 15‐day‐old broilers were randomly assigned to 4 treatments: corn‐soya bean meal as the basal control diet or the basal diet containing either 100, 200 or 300 mg/kg of YSE. Each treatment consisted of four replicate pens with eight broilers per pen. The experiment lasted 28 days which was divided into a grower period (day: 15–28) and a finisher period (day: 29–42). On day 28 and day 42 body weight (BW), feed intake (FI) and feed conversion rate (FCR) were recorded. Duodenum, jejunum and ileum were collected to analyse superoxide dismutase (SOD), catalase (CAT), glutathione peroxidase (GPx) activities, malondialdehyde (MDA) concentrations, total antioxidant capacity (T‐AOC) and gene expressions of SOD, CAT, GPx. The results showed that during the grower period a diet including 100 mg/kg YSE improved CAT capacity in the ileum, tended to increase activities of GPx in the duodenum, and further showed enhancing tendencies in SOD and GPx abilities in ileum. Gene expressions of CAT, SOD and GPx in the ileum tended to upregulate at 100 mg/kg YSE level. In the finisher period and over the whole period, all YSE groups had a reduced FI compared to the control group without compromising BW; 100 and 200 mg/kg YSE significantly improved FCR. In conclusion, the improved growth performance of broilers during the finisher period may be due to enhanced antioxidative ability in the grower period with YSE supplementation. This study provided evidence of using YSE as an additive to enhance growth in broilers.     

对虾白斑综合症病毒变性高效液相色谱检测方法的建立与应用

据对虾白斑综合症病毒(WSSV)的基因保守序列,使用Primer Explorer V3软件设计了2条引物,利用PCR的扩增产物,结合变性高效液相色谱(DHPLC)技术,建立了一种对虾白斑综合症病毒的DHPLC快速检测方法。该检测方法特异性好,与传染性皮下和造血器官坏死病毒、斑节对虾杆状病毒、肝胰腺细小病毒、对虾杆状病毒以及对虾基因组DNA无交叉反应;检测灵敏度较高,约为10-5ng/μL,高于常规PCR及荧光定量PCR的灵敏度。用建立的DHPLC方法对100尾对虾样品进行了临床检测,结果与荧光定量PCR检测结果一致。WSSV的DHPLC检测方法,特异性强、灵敏度高,是对WSSV进行有效检测的一种新方法。     

猪囊尾蚴头节单链抗体-PE40重组蛋白的表达及抗虫活性分析

将含有抗猪囊尾蚴头节单链抗体基因（ScFv）和绿脓杆菌外毒素基因（PE40）的重组质粒pET28．ScFv-PE40转化到大肠杆菌BL21中,经IPTG诱导,表达产物通过SDS-PAGE和westernblot鉴定,其表达蛋白的相对分子量约为68ku,表达量约占菌体总蛋白的13．8％。将融合蛋白通过金属Ni2^＋亲和层析柱纯化后,目的蛋白纯度在95％以上,可溶性蛋白的回收率约为50％,回收量为5mg／L。本研究所进行的纯化重组蛋白的体外杀伤六钧蚴试验表明,重组蛋白对六钩蚴具有较强的杀灭作用,而且与其剂量呈正相关性。     

蛋白原料发酵后营养价值评定研究

本试验把蛋白原料膨化豆粕、棉籽粕、菜籽粕经过啤酒酵母菌、凝结芽孢杆菌以及德氏乳酸杆菌发酵处理后,得到相应的发酵蛋白原料产品指标符合国家饲料卫生标准,小肽含量及其他营养成分得到改善,抗营养因子含量基本消除和降低,显著提高了酵母菌、乳酸杆菌、芽孢杆菌和总菌数,大大提高了蛋白原料的附加值,为节约蛋白饲料,有效提高蛋白原料的综合利用价值开辟了一条新的途径.     

兔卵母细胞孤雌激活方法的研究

对兔卵母细胞的孤雌激活方法进行探讨,为兔的体细胞核移植奠定良好的技术平台。体外成熟培养20～22h的兔卵母细胞随机分组,分别进行以下试验：采用不同脉冲电压、脉冲次数和脉冲时间,电激活兔卵母细胞,摸索最佳电激活参数;比较不同的激活方法处理免卵母细胞的效果,Ⅰ：Ion5min＋6-DMAP3h,Ⅱ：Ion5min＋CHX3h,Ⅲ：Ion5min＋6-DMAP联合CHX3h,Ⅳ：电激1次联合6-DMAP＋CHX3h;优化6-DMAP与CHX作用时间。结果显示：当电激参数为：电压40V／mm,脉冲时间20μs和脉冲次数3次时,兔孤雌胚的分裂率和囊胚率最高,可达80．64％和14．51％;采用第Ⅳ种方法激活兔的卵母细胞,胚胎的分裂率和囊胚率（80．64％,13．71％）均显著高于Ⅰ组（66．67％,8．6％）和Ⅱ组（43．21％,1．24%,P〈0．05）,略高于第Ⅲ组（77．59％,12．07％）;当兔孤雌胚分别在含6-DMAP和CHX的CM中培养1。h和3h时,1h处理组在分裂率（80．68％vs77．59％）和囊胚率（15．91％vs12．07％）上都略高于3h处理组。结果表明：兔卵母细胞经Ion处理5min,或先电激1次（参数为电压40V／mm,脉冲时间20μs,脉冲3次）,再用2mmol／L6-DMAP＋5mg／LCHX处理1～3h,均可获得较好的激活效果,有利于兔孤雌胚的发育。     

2009—201O年新疆地区家禽禽流感免疫抗体监测与分析

2009--2010年,对新疆部分地区蛋鸡、肉鸡、家养水禽的养殖场随机采集血清样品10193份,活禽市场采集血清样品1620份。用HI方法对禽流感免疫抗体进行检测,结果表明：蛋鸡的H5免疫抗体合格率为33．33％～100％,其中0效价率为33．33%-80．00％;H9免疫抗体合格率为62．4%-100％,20%-33％蛋鸡场存在100％的0效价现象。肉鸡H5免疫抗体合格率为0％-100％,其中7．69%-69．6％肉鸡群中H5抗体0效价率为100％。水禽的H5免疫抗体合格率为0%-100％,有25％33．33％鸭群全部是0效价。活禽市场H5抗体效价≥410g2的比例为10．59％-83．57％,H9抗体效价至410醇的比例21．70％-67．14％。     

The Effect of Season on Spermatozoa Motility,Plasma Membrane and Acrosome Integrity in Fresh and Frozen–Thawed Semen from Xinong Saanen Bucks

The aim of this study was to evaluate whether the season of ejaculate collection influences seminal quality parameters of pre‐ and post‐freeze–thawing in Xinong Saanen bucks. Ejaculates were collected from eight bucks throughout the four seasons (spring, summer, autumn and winter) in a 12 months’ time period, identified in the Northern Hemisphere. Semen samples were evaluated by the combinations of conventional and Computer‐Assisted Sperm Analysis (CASA) when fresh and after frozen–thawed, respectively. The results clearly demonstrated that season of ejaculate collection influenced (p < 0.05) fresh semen quality. Highest semen quality was observed during autumn. On the contrary, undesirable indices (significantly lower, p < 0.05) were observed in winter as compared with the other remaining seasons. CASA has clearly shown the influences of seasonal variations on semen motility parameters. Furthermore, season of ejaculate collection was also found to influence sperm freezability. Semen characteristics after frozen–thawed followed a similar pattern with that of fresh ejaculate except in spring. The results revealed that sperm quality was higher (p < 0.01) in summer and autumn than in spring and winter. In conclusion, seasonal variation influences semen quality in Xinong Saanen bucks. In addition to summer and autumn, fresh ejaculates in spring can also be successfully used for AI. Sperm from ejaculates collected during summer and autumn are more suitable for cryopreservation. Hence, it is possible to increase the efficiency of goat breeding by manipulating the seasonal variations of semen quality for immediate AI and/or cryopreservation.