sowandgiltmanagementtechniques經(jīng)產(chǎn)母豬和后備母豬管(編輯修改稿)
2024-11-29 17:09 本頁面
【文章內(nèi)容簡介】 more gilts沒有增加足夠的后備母豬 – Less selection選擇少 – Breed of marginal邊緣配種 ? Poor P1 and sow performance頭胎和經(jīng)產(chǎn)母豬性能差 (Williams, Patterson, and Foxcroft. Banff Pork Seminar, 2020) United Feeds Research Parturition Mass 分娩重 165 ? kg 193 ? kg Average Litter Growth (kg/d)平均窩增重速度（公斤 /天） Percentage of largest 16 ovarian follicles ? at weaning斷奶時最大的 16個卵泡大于 百分比 % % Parturition Mass 分娩重 kg kg Sows in estrus within 9 days after weaning斷奶后 9天內(nèi)母豬發(fā)情比率 58% 86% Ovulation Rate排卵數(shù) (Clowes et al., 2020) (MejiaGuadarrama et al., 2020) Effect of body weight at parturition on subsequent reproductive and litter performance分娩時體重對隨后的繁殖和窩仔生長性能的影響 United Feeds Research Effective “selection” techniques有效的“選擇”技術(shù) ? “ Selected” gilts respond early to boar contact 選擇對公豬接觸反映較早的后備母豬 ? “Selection” should include a recorded estrus選擇需要包括有記錄的發(fā)情 ? “Selection should occur below market weight選擇需要在達到上市體重之前進行 ? “Nonselect” gilts should be culled選不上的后備母豬要淘汰 United Feeds Research At what age does puberty “naturally” occur in gilts?在多大日齡后備母豬自然達到性成熟 What factors are important in determining age at puberty?哪些因素對決定性成熟日齡比較重要 ? Age of boar introduction 引入公豬接觸的日齡 ? Direct stimulation with boars公豬的直接刺激 ? Good heat detection management好的發(fā)情檢測技術(shù) ?120 to 200+ days日齡 United Feeds Research 01020304050607080901000 6 9 12 15 18 21 24 27 30
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