蛋鸡日粮中添加醇母硒对鸡蛋中硒含量的影响

选用90只Hy-Line W-98母鸡(26周龄)进行为期8周的试验,研究来源于酵母硒的有机硒做为产蛋鸡硒来源的作用效果.试验结果表明,在蛋鸡日粮中添加酵母硒可以有效提高鸡蛋中的硒含量.     

高粱bmr-6和bmr-12基因的比较效应 Ⅰ．饲料高粱产量和品质

褐色叶中脉（bmr）饲料通常含有较少的木质素而更易消化。近年来的研究从bmr突变中鉴定出了生化通道的变化。在高粱中bmr-6与肉桂醇脱氢酶（CAD）活性的降低相关。等位基因bmr-12和bmr-18能降低咖啡酸-O-甲基转移酶（COMT）的活性。     

德国的农药监督调查

德国联邦消费者保护与食品安全办公室 (BVL)主持德国1项新的农药监测项目,明显地促进了产品供应与使用管理的实施。BVL在1 份新的2004年监测结果的报告中指出,这是 BVL首次与地方管理机构联合开展的1项调查工作,并将对该项工作程序进一步加以完善。     

马立克氏病毒单克隆抗体杂交瘤细胞株的建立与鉴定

以马立克氏病毒814株(MDV-814)作为免疫用抗原,建立了2个MDV特异性单克隆抗体(McAb)杂交瘤细胞株—4A6、3D7。鉴定结果表明;两株细胞所分泌的McAb均为IgM类免疫球蛋白,具有MDVⅠ型病毒特异性,无中和反应特性和沉淀反应特性。利用两种McAb对国内标准强毒MDV-京1株进行鉴定,肯定其为MDV-Ⅰ型毒株。     

Estimating Combining Ability of 4x-2x Crosses in Cultivated Potatoes

Progenies derived from crosses between Solarium tuberosum and 2n pollen-Producing diploid hybrids, exhibit obvious hybrid vigor. The 2n pollen-producing clone can act as a bridge in crossing S. tuberosum and S. andigena with S. phureja. Populations from 4x-2x crosses show more unifomity and less segregation compared with that of 4x-4x crosses. The parent-offspring correlation for the traits, starch content and tuber number, is significant at 0.01 level. The regrssion equations are Y (mp-F1)=1.0 1.2x and Y (mp - F1) = 5.3 0.8x, respectively. The 2n pollen-producing clones play an impotant role in increasing tuber stach content. Estimates of the combining ability for the main yield components indicate that additive effect prodominatcs for such trais as plot yield, tuber weight per plant and starch content, whereas both additive and non-additive effects lay equal stress on mean tuber weight and non-additive effect is important for tuber number. In general, non-additive effect appears to be important in     

Assessment of Negative Training on the Use of Cubicle Beds by Heifers

40 in-calf heifers were observed to examine the effect of timbers placing in passage area on their use of cubicle beds. Prior to the experiment preliminary observation was taken on these 40 heifers and they were divided into two even groups (cubicle user(or control) group versus cubicle refusal (or experimental) group by whether they properly used the cubicle beds or not. The timbers were placed in passage and feeding areas for the cubicle refusal group to force the animls to lie in the cubicle beds. The results of this experiment showed that feeding behaviour was unaffected by the presence of the timbers, but lying acitvity was about 8% higher for the experimental group, which led to a mean of almost 2 hours longer lying time over 24 h. After the timbers were removed, there was a significant decline in lying by the experimental group. The diurnal pattern of lying behaviour in cubicles indicated that the major effect on lying activity exerted by the presence of the timbers was seen during midnight to 10:00 a     

弟弟你听我说——一则因超速行驶引发的警示故事

亲爱的弟弟：　你离开这个世界已是11天了,我们姐弟从未这么久失去联系,当我习惯地拨打你的手机,那边传来：“嘟嘟……”的声音,再也没有我最想听的那一声：“姐”!弟弟,从此以后,你我阴阳相隔,让我怎样再向你诉说我的悲与喜？     

三明市农科所育成的水稻三系不育系元丰A通过福建省科技成果鉴定

籼型水稻野败细胞质雄性不育系元丰A是三明市农科所育成的水稻三系不育系。经专家考察，元丰A田间表现群体整齐一致，不育株率为100％，不育度达99．99％，不育系柱头外露率47．16％；保持系元丰B经农业部稻米及制品质量监督检验测试中心分析，12项指标中有9项指标达部颁一级优质米标准，3项指标达部颁二级优质米标准，2006年9月23日通过福建省科技成果鉴定。     

日粮磷、植酸酶和25-羟胆钙化醇对平而笼养肉鸡生长性能的影响

采用三个平面笼养肉鸡试验（试验一、二、三）研究非植酸磷（NPP：nonphytin phosphorus）需要的应用及层架式鸡笼试验中确定的植酸酶（PHY）和25-羟胆钙化醇（25D）对节约NPP的影响，试验期为49天。设定6个NPP日粮处理组，肉鸡分四阶段饲养。处理1到6分别如下：NRC（1994）的NPP（C）、马里兰大学NPP（UMD）、UMD NPP-0．0064％（UMD＋PHY）、     

Effect of Phytosulfokine-α on Agrobacterium-Mediated Transformation in Rice

Phytosulfokine(PSK)is a new peptide plant hormone,which was isolated in the conditioned medium of cultures derived from both monoco-tyledonous and dicotyledonous plants,such as Asparagus officinalis mesophyll[1],rice[2],zinnia[3],and carrot[4].PSK has two types of structure:PSK-αand PSK-β.The former is a sulfated pentapeptide[H-Tyr(SO3H)-Ile-Tyr(SO3H)-Thr-Gln-OH],the latter is a sulfated terapeptide[H-Tyr(SO3H)-Ile-Tyr(SO3H)-Thr-OH].Both are heat-stable,susceptible to pronase…