畜牧獸醫(yī)畢業(yè)論word版(編輯修改稿)
2025-07-09 06:44 本頁面
【文章內(nèi)容簡介】 . 7 致 謝 .............................................................. 8 江蘇農(nóng)林職業(yè)技術(shù)學(xué)院畢業(yè)設(shè)計（論文） 2 養(yǎng) 鴨 的疾病防治 楊芳 （江蘇農(nóng)林職業(yè)技術(shù)學(xué)院 11 畜牧獸醫(yī) 句容 212400） 摘要 : 過去 20多年來，我國家禽業(yè)取得了極大的發(fā)展，我國已成為名副其實的養(yǎng)禽大國，國內(nèi)、國際的家禽貿(mào)易也日益頻繁。隨著家禽業(yè)的快速發(fā)展，家禽疾病也變得越來越復(fù)雜，老的疾病仍不斷發(fā)生，新的疾病又不斷出現(xiàn)，病原毒力及血清型也不斷變化；單 純性的典型病例少見， 2 種甚至 2 種以上疾病混合感染的現(xiàn)象十分普遍；一些原來危害性不大的疫病，現(xiàn)已逐漸成為普遍發(fā)生和危害性頗大的疾??；免疫抑制性疾病的普遍存在，免疫失敗的情況常有發(fā)生；環(huán)境性、條件性疾病，以及中毒病及營養(yǎng)不良等疾病的發(fā)病率也有上升的趨勢。凡此種種，已使之成為制約家禽業(yè)持續(xù)穩(wěn)定發(fā)展的重要因素之一。所以對鴨的疾病預(yù)防十分重要。 關(guān)鍵詞 鴨；疾?。活A(yù)防治療 Raise ducks of disease prevention and control Abstract Over the past 20 years, aviculture has achieved great development in our country, our country has bee worthy of the name YangQin power, domestic and international trade of poultry is also increasingly frequent. Along with the rapid development on the poultry sector, poultry disease is being more and more plex, the disease is still ongoing, new diseases and appear constantly, pathogen virulence and serum type is changing。 Simple of typical cases, two or even more than two kinds of the mixed infection of disease is mon。 Some original harmfulness is the disease, has gradually bee a mon occurrence and harmfulness is quite big disease。 Immune suppression widespread diseases, immune failure often happen。 Environment, conditional disease, the incidence of disease and malnutrition, disease and poisoning also has a rising trend. All these, has bee one of the important factors restr
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