饲料中添加桑叶对种母猪繁殖性能的影响

试验在繁殖母猪饲料中添加3%和5%桑叶粉,结果表明,试验组母猪繁殖率、仔猪成活率比对照组分别提高12%、12%和5.62%、4.08%,差异显著。     

烯效唑和赤霉素对马铃薯产量的影响

为解决齐齐哈尔市主栽马铃薯品种单产较低的问题,在大田条件下,以马铃薯尤金品种和克新13品种为试验材料,对比在初花期进行叶面喷施10、20、30、40、50 mg·L~(-1)烯效唑(Uniconazole,简称S3307)和播种前用10、50、100、150、200 mg·L~(-1)赤霉素(Gibberellin)GA_3浸种处理对商品薯产量的调控效应。结果表明:S3307在10～40 mg·L~(-1)的浓度下,GA_3在10～50 mg·L~(-1)的浓度下均能增加马铃薯的商品薯产量,但S3307的增产效果要优于GA_3,S3307在两个品种上的增产幅度均在20%以上,而GA_3的增产幅度均在10%以上。且不同品种间对植物生长调节剂的敏感程度也不一样,克新13对浓度的范围敏感度要高于尤金品种。     

褐煤腐植酸对钾的吸附特性研究

为给褐煤的有效利用和腐植酸缓效肥的研制提供理论依据,本试验采用吸附等温线的试验方法,探讨了K⁺平衡溶液浓度、平衡时间、pH值及固液比对褐煤腐植酸钾吸附的影响。结果表明：介质pH值升高有利于腐植酸样品对钾的吸附,且能加快吸附反应的速度;当pH<4.4时,K_d1>K_d2,此时以物理吸附为主。当7.12K_d1<K_d2,化学交换占主导地位。其等温吸附曲线符合Langmuir吸附形式,动力学吸附用Elovich方程描速最佳。经硝酸处理后的褐煤腐植酸样品对钾的吸附能力有了一定程度的提高。适宜的固液比能提高2种样品对钾的单位吸附量,分别在固液比为0.06和0.04时达最大,其单位吸附量分别为0.079 g/g和0.094 g/g。     

宣恩县标准果园创建成果及主要经验

2009年,宣恩县按照农业部、湖北省农业厅部署,启动了柑桔标准果园创建活动,通过＂争取领导重视、争取部门配合、争取专家指导、争取企业参与、争取群众支持＂五项措施,标准果园创建活动成效显著：基地建设发展迅猛,配套设施显著改善,技术推广力度不断加强,科技管理水平日益提高,果园面貌焕然一新;果品质量大幅提高,果业效益进一步突显;果业经合组织日趋活跃,龙头企业扎实推进,示范带动作用明显。     

松乳菇多糖提取与含量分析

用多种提取方法从两种野生松乳菇中提取多糖。实验结果表明,松乳菇与红松菌的多糖常规提取率分别为10.9518％、8.7948％,微波提取率分别为11.1728％、9.5959％,超声提取率分别为11.6935％、9.3802％,方差分析显示3种提取方法对两种野生松乳菇多糖的提取率影响不显著,两菌多糖含量差异不明显。     

配制低蛋白质日粮的必要性及其注意事项

近几十年来．猪的氨基酸营养一直是各国学者研究的热点。一方面由于全世界范围内蛋白质资源的日趋紧张．另一方面由于日粮氨基酸不平衡引发粪尿氮大量排放而引起严重的环境污染。在成本和环保的双重压力下,低蛋白质日粮成为自20世纪90年代以来欧美动物营养领域的研究热点。因此,在充分满足动物营养需要的情况下．采用以理想氨基酸模式为基础,按照真可消化氨基酸需要量合理配制低蛋白质日粮,对降低日粮蛋白质水平及减少环境污染意义重大。     

通过营养和饲养管理调控蛋重

蛋鸡产蛋初期蛋重太小，无法满足人们的消费需要；随着产蛋日龄的增加蛋重将逐渐变大，但实际生产中，当蛋重达到一定程度后不再使其增加，因为在某一恒定的温度下，蛋重每增加1g需要提高2％的采食量，这将增加鸡蛋的成本而造成无利可赢。因此，必须对蛋重进行调控。     

Survey on blood-sucking lice (Phthiraptera: Anoplura) of ruminants and pigs with molecular detection of Anaplasma and Rickettsia spp

Lice may serve as biological or mechanical vectors for various infectious agents. To investigate louse infestation of ruminants and pigs, and pathogens potentially transmitted by them, anopluran lice (n=1182) were collected in Hungary, and evaluated for the presence of anaplasma, rickettsia and haemotropic mycoplasma DNA. On cattle the following species were found: Linognathus vituli (57%), Haematopinus eurysternus (38%) and Solenopotes capillatus (5%). L. vituli had a lower mean individual count/host when compared to H. eurysternus. On calves only L. vituli was observed, with a higher louse burden than on full-grown cattle. H. eurysternus and S. capillatus were more likely to occur simultaneously with another species on the same host, than L. vituli. Goats infested with Linognathus stenopsis had the overall highest prevalence (68%), while pigs harbouring Haematopinus suis showed the lowest (<1%). Anaplasma DNA was detected in 50% of pools analysed. In L. vituli Anaplasma ovis (or a closely related novel Anaplasma marginale genotype) was identified. Anaplasma-positivity of H. suis suggests that pigs may extend the reservoir and/or host spectrum of relevant species. Anaplasma-infected L. stenopsis pools show for the first time that caprine anaplasmosis is endemic in Hungary. Rickettsia spp. were demonstrated from Linognathus spp. and H. eurysternus. No haemotropic mycoplasmas were detected in any samples. In conclusion, this is the first molecularly confirmed report of bovine and ovine Anaplasma spp. in L. vituli, L. stenopsis and H. suis. The present results suggest that phthirapterosis of domestic animals deserves more attention, and lice should be evaluated among the broad range of potential vectors of arthropod-borne pathogens.     

护仔康2号对僵猪生长的影响

选取50日龄以上,体重在8kg以内的僵猪24头,随机分为二组。对照组喂小猪料,试验组另外添加2％护仔康2号。饲喂17天后,对照组死亡7头,每头日增重仅0.047kg,发病率和死亡率分别为83％和58％;试验组仅有个别发病,无死亡,且每头日增重达0.193kg,料肉比为2.07:1。每头日增重试验组是对照组的322％。从而说明护仔康2号对僵猪有明显的促进生长作用和降低死亡率效果,并可明显增加养殖者的经济效益。