【正文】 f pany 公司的特點(diǎn) – Reliability, Honesty and Integrity 可靠、誠實(shí)和正直 – Manufacturing and handling practices 生產(chǎn)和經(jīng)營的經(jīng)驗(yàn) March 20, 2023 53 US Grains Council Seminar Factors to consider when purchasing a boar semen extender 購買公豬精液稀釋粉時考慮的因素 ? Performance of extender 稀釋粉的效能 – Maintaining viability of sperm cells (be careful) 維持精子的活率 （一定小心） – Farrowing rate litter size 分娩率和窩產(chǎn)仔數(shù) – Scientifically sound data to substantiate claims 科學(xué)可靠的數(shù)據(jù)證實(shí)他們宣稱一樣 March 20, 2023 54 US Grains Council Seminar Results of research trials can change over time 試驗(yàn)研究結(jié)果可隨時間而改變 657075808590A B C A B C A B CExte n d e r 稀釋液Farrowing rate, % 分娩率Jun – Dec 1998 1998,612 Jan – Jun 1999 1999,16 Jan – Jun 1998 1998,16 x y x x x y x x x About 1,000 matings for each extender during each time period 每個稀釋粉每個試驗(yàn)期大約配 1000頭母豬 xy within time period (P .05) March 20, 2023 55 US Grains Council Seminar Results of research trials can change over time 試驗(yàn)研究結(jié)果可隨時間而改變 1011A B C A B C A B CExte n d e r 稀釋液Litter size 窩產(chǎn)仔數(shù)Jun – Dec 1998 Jan – Jun 1999 Jan – Jun 1998 x x x x x y x x x About 1,000 matings for each extender during each time period 每個稀釋粉每個試驗(yàn)期大約配 1000頭母豬 xy within time period (P .05) March 20, 2023 56 US Grains Council Seminar All sows inseminated should receive viable semen at each insemination! 每頭母豬每次輸精都保證輸入的精液活率 ! ? Average age of sperm cells when majority of sows are inseminated? 多數(shù)母豬輸精時精液保存的天數(shù) ? ? Age of oldest sperm cells at time of use? 所用精液保存最長的天數(shù) ? Should type of extender be selected on: 選擇稀釋粉根據(jù) : March 20, 2023 57 US Grains Council Seminar Some boar’s semen survives better with Extender X whereas semen from other boars survives better with Extender Y. 一些公豬的精液以 X稀釋液稀釋后效果好 ,而另一些公豬的精液以 Y稀釋液稀釋后效果好 . March 20, 2023 58 US Grains Council Seminar 01020304050607080901000 1 2 3 4 5A g e o f s e m e n (d a y s ) 精液保存時間 ( 天 )Viability, % 活率B T SA n d r o h e pM o d e n aAndrohep was the “best” for Boar 43214. Androhep 對 43214公豬最“好”的 Best最好 March 20, 2023 59 US Grains Council Seminar Androhep was the “worst” for Boar 71236. Androhep 對 71236公豬是最“差”的 Worst 最差 March 20, 2023 60 US Grains Council Seminar Remendations 推薦 ? The boar stud should keep a sample of each batch of semen until the “expiration” date on the doses has passed. 公豬站應(yīng)保留每一批的精液樣品，直至這批精液過期為止。Production of High Quality Boar Semen 高品質(zhì)的公豬精液的生產(chǎn) Donald G. Levis, PhD Extension Educator University of Nebraska – Lincoln Agricultural Research Development Center March 20, 2023 1 US Grains Council Seminar Subject matter to be discussed 討論的主要問題 ? Management of boars 公豬管理 ? Procedures for collecting, processing and storing semen 精液的采集、處理和貯存程序 ? Design and management of a mercial offsite boar stud 場外商品公豬站的設(shè)計和管理 March 20, 2023 2 US Grains Council Seminar Management of Boars 公豬的管理 ? Topics to discuss 討論的主題 – Reasons for culling AI boars 淘汰人工授精站公豬的原因 – Heatstress effects 熱應(yīng)激作用 – Photoperiod effects 光照周期的作用 – Frequency of collection 采精頻率 – Feeding program 飼養(yǎng)程序 March 20, 2023 3 US Grains Council Seminar Reasons for culling AI boars 淘汰人工授精站公豬的原因 Reason 原因 % Age 年齡 28 Semen quality 精液品質(zhì) 28 Soundness 健壯 10 Libido 性欲 10 Temperament 性情 3 Ulcers 潰湯 3 Other 其它 18 March 20, 2023 4 US Grains Council Seminar Rectal temperature: 直腸溫度 176。 F (30 C) Scrotal temperature is C higher than wk 1 陰囊溫度比一周前高 ℃ 氣溫(華氏) 氣溫 陰囊溫度 陰囊溫度(華氏) 天 15 Caution 注意 ? Keeping the floor too wet causes: 保持地板太濕將導(dǎo)致 : – Bacterial contamination of semen 細(xì)菌污染精液 – Soft pads on the feet of boars 過軟的墊子對公豬蹄了的影響 March 20, 2023 16 US Grains Council Seminar Does the duration of photoperiod influence sperm production? 光照時間影響精子的產(chǎn)量嗎 ? March 20, 2023 17 US Grains Council Seminar Influence of photoperiod and temperature on sperm production 光照時間和溫度對精子產(chǎn)量的影響 6 7 . 74 7 . 85 9 . 94 6 . 9010203040506070801 0 h r s 1 6 h r sPh o to p e r i o d , h r sSperm/ejaculate, billion1 5 C 3 5 C* * P .05 * 每次射精的精子數(shù)(十億) 光照時間 (小時 ) March 20, 2023 18 US Grains Council Seminar Frequency of ejaculation 射精頻率 ? Balance between semen volume and sperm cell concentration ? 精液的體積和精子的密度之間平衡 – volume of seminal fluids important for extension –精清的體積對稀釋是非常重要的 – number of viable sperm important for fertility –活精子的數(shù)量對受精是非常重要的 March 20, 2023 19 US Grains Council Seminar Frequency of ejaculation 射精頻率 ? Two collections per week is near optimum for boar studs 對公豬站公豬 ,每周 2次采精較理想 – Monday and Thursday 周一和周四 – Tuesday and Friday 周二和周五 ? Some studs only collect one time per week 一些公豬站每周只進(jìn)行一次采精 March 20, 2023 20 US Grains Council Seminar The effect of interval between collection on sperm output 采精間隔對精子產(chǎn)量的影響 354250556368717375798201020304050607080901 2 3 4 5 6 7 8 9 10 11 12Interval Between Collection, Days 2次采精間的間隔 (天 ) Sperm Cells/collection (billion) 每一次采精的精子總數(shù)(十億) March