后備母豬選擇BSC[彩圖說明]

tjutarts · 發(fā)表于 2009-7-13 23:34:30

本帖最后由 tjutarts 于 2009-7-14 16:15 編輯

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后備母豬選擇

生長情況
Growth

選擇同窩豬中生長速度快的豬只。
Gilts should be in the fastest growing 50-60% of theircontemporary group.

生長速度快的豬女可以擁有較長的使用年限。
Adequate growth increases the probability of properreproductive development.

生長速度慢的豬女有可能出現(xiàn)初情期延遲的現(xiàn)象，并且在以后的飼養(yǎng)過程中問題較多。
Slow growing females (within a group) may have a delayed first estrus and may be lifelong problem breeders.

背膘
Backfat

背膘厚度對于后備母豬選擇是一個非常重要的指標。
Backfat is important ifreplacement females are produced within the herd.

對于良種豬群，通過《聯(lián)邦國家豬群改進指導(dǎo)方針》獲得合適的測量和調(diào)整標準。
Consult NSIFGuidelines for Uniform Swine Improvement to obtain proper measurement andadjustment criteria.

特定豬場的推薦背膘厚度會根據(jù)遺傳、環(huán)境和終端市場的需求而改變。
Recommended levelsof backfat are farm specificand may change due to genetics, environment, and end market.

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