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排序方式: 共有1086条查询结果,搜索用时 15 毫秒
1.
2017年7月,内蒙古赤峰某规模化养驴场因天气骤变而发生12头1月龄内驴驹腹泻病情,发病率达40%。经临床辨证论治,确诊为湿热阻遏脾胃、运化不畅所致腹泻,运用藿香正气液灌服,治疗效果显著,值得兽医临床借鉴和推广。 相似文献
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Sergio Salazar-Villanea Maikol Astúa-Ure?a Allison Masís-Montoya Juan I.Herrera-Mu?oz Catalina Salas-Durán 《畜牧与生物技术杂志(英文版)》2022,(6):1810-1817
Background: Nutritional value of proteins in feed ingredients can be negatively affected by hydrothermal processing, which causes large variation in the bioavailability of amino acids(AA) and negatively affects animal productive performance. Supplementation of exogenous proteases could increase the rate of digestion of damaged proteins, thereby increasing overall AA digestibility and bioavailability. The aim was to determine the effect of exogenous protease supplementation on the apparent ileal ... 相似文献
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正We are pleased to publish the second special issue on avian brood parasitism and to be responsible guest editors for the two special issues of Chinese Birds (Vol. 3, No. 4, 2012 and Vol. 4, No. 1, 2013), entitled "Avian Brood Parasitism - A Growing Research Area in Behavioral Ecology". The first issue was published in December 2012. The goal of the two special issues is to publish accumulated knowledge and some of the recent developments in 相似文献
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植物生长调节剂在杧果生产中具有调节花期,提高开花质量和座果率,改善果实外观,提高果实品质,延长果实储藏期及防治病虫害的作用,在杧果生产中的应用也逐年增多,但在使用中存在药剂残留,使用技术难以精准把握及过分依赖植物生长调节剂的问题。建议在杧果生产中制订出科学合理的技术规范,加强对杧果生理生化机理的研究,筛选出适用于杧果的植物生长调节剂新产品,同时加强农民种植技术培训,使植物生长调节剂在杧果生产上安全使用,更好服务于杧果生产。 相似文献
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Various diagnostics techniques were compared for their ability to detect infectious laryngotracheitis (ILT) during an outbreak in chickens aged between 4 and 21 wk. Gross lesions ranged from excess mucus to accumulation of fibrinonecrotic exudate in the larynx and trachea. Syncytial cells with intranuclear inclusion bodies were found in sinus, conjunctiva, larynx, trachea, lung, and air sac. Virus isolation in chicken embryos was attempted in every case. Negative-stain electron microscopy detected herpesvirus in only 6% of the cases. Yet, isolation of ILT virus in the chorioallantoic membrane was presumed by histology in >20% of the samples and confirmed by fluorescent antibody (FA) in 35% of the embryos inoculated with conjunctivas or tracheas from affected birds. Overall, results from histology and FA tests were highly correlated. FA test has the advantage over histology of being diagnostically specific for ILT virus. Polymerase chain reaction was the most sensitive test and detected the viral DNA even in cases where histology and FA were negative. ILT virus DNA was quantified by real-time polymerase chain reaction (Re-Ti ILTV). Histologic and FA results from larynx and trachea were negative if the concentration of the viral DNA was < or =4 of log10. A viral DNA concentration higher than log10 4, as determined by Re-Ti ILTV, was required for clinical ILT to be manifested. 相似文献
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Arturs Katamadze Omar Vergara-Díaz Estefanía Uberegui Ander Yoldi-Achalandabaso José Luis Araus Rubén Vicente 《作物学报(英文版)》2023,(4):1080-1096
In recent decades, genetic advances in yield improvement in the major cereal crops, including wheat, has stagnated or proceeded at a slower rate than is required to meet future global food demand, particularly in the face of climate change. To reverse this situation, and in view of the future climate scenario, there is a need to increase the genetic diversity of wheat to increase its productivity, quality, stability, and adaptation to local agro-environments. The abundant genetic resources and l... 相似文献
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<正>(续《蜜蜂杂志》 2022年第4期)李老师:您好!我是湖南一位“九○后”年轻的养蜂人,喜欢中蜂,已有9年养蜂经历,从当初传统土养到意标再到现在的GN。如果养蜂有等级,那么我认为依次排列可以是:新手,学徒,师傅,大师,一代宗师。“十年磨一剑”,我从新手“磨”到学徒了。2年前,我偶然在我师傅那儿看到龚凫羌教授的《蜜蜂饲养原理与方法》一书,才知道有GN箱这种蜂箱。全新的理念与技术,它一下就吸住了我的眼球,引我入胜,原来“天外有天人外有人”,我如获至宝。那时龚教授已去世,我不知道宁老师正在传承讲授龚氏蜂学精髓,没能参加全国养蜂提高班速成。 相似文献