第三十三期：賴氨酸限制-充足飼喂模式對生長肥育豬補(bǔ)償生長的影響

zhutao19871018

2016. J.Anim.Sci. 94(1): 255-266

賴氨酸限制-充足飼喂模式對生長肥育豬補(bǔ)償生長的影響

L. Cloutier, M.-P. Létourneau-Montminy,J. F. Bernier, J. Pomar 和 C.Pomar

通過3個飼養(yǎng)階段，每階段28天，研究賴氨酸前期限制后期足量供給對生長豬性能的影響。試驗(yàn)選用47頭去勢公豬(GPerformer 8.0 × Fertilis 25; Genetiporc 公司,圣伯納德，QC，加拿大；初始體重26.7±2.7 kg)，每天給予賴氨酸需要量的70%或100%，根據(jù)以下5種排序中的1種：70–70–70，70–70–100，70–100–70，70–100–100或100–100–100（各個排序中數(shù)字分別表示第1、2、3階段賴氨酸添加量）。通過豬每天的實(shí)際體重、采食量和增重預(yù)估每頭豬每天的賴氨酸需要量。第1階段結(jié)束時，給予100%賴氨酸需要量組的豬只平均采食量（ADFI，P= 0.01）、平均日增重（ADG，P< 0.01）和日均蛋白沉積量(P < 0.01)均明顯高于給予70%賴氨酸需要量組的豬只。第2和3階段的試驗(yàn)結(jié)果與階段一結(jié)果一致。第2階段結(jié)束時，70-100組豬只沒有表現(xiàn)出任何補(bǔ)償反應(yīng)，其ADFI、ADG和日均蛋白沉積量與100-100組豬只沒有明顯差異。第3階段有類似的結(jié)果。盡管生長期沒有觀察到任何補(bǔ)償生長，但70-100-100處理的豬在體重和體蛋白含量方面能夠趕上100-100-100處理的豬，這一現(xiàn)象表明確實(shí)發(fā)生了小程度的補(bǔ)償增長。本試驗(yàn)研究結(jié)果不能判定補(bǔ)償生長的存在。

Effect of a lysine depletion–repletionprotocol on the compensatory growth of growing-finishing pigs

L. Cloutier, M.-P. Létourneau-Montminy,J. F. Bernier, J. Pomar and C. Pomar

The effect of Lys restriction followedby a repletion period on the performance of growing pigs was studied during 3feeding phases, each lasting 28 d. A total of 47 castrated male pigs (GPerformer 8.0 × Fertilis 25 pigs; Genetiporc Inc., Saint-Bernard, QC, Canada;initial BW of 26.7 ± 2.7 kg) were given each d 70% or 100% of their Lys requirementsaccording to 1 of the following 5 sequences: 70–70–70, 70–70–100, 70–100–70,70–100–100, or 100–100–100 (for each sequence, numbers indicate the Lys supplypercentage in phase 1, 2, and 3, respectively). Individual Lys requirementswere estimated daily on the basis of each pig’s actual BW and feed intake andBW gain patterns obtained by regression using each pig’s historical data. Atthe end of phase 1, the pigs given 100% of their Lys requirements had higherADFI (P = 0.01), ADG (P < 0.01), and average daily protein deposition (P< 0.01) than did the pigs given 70% of their requirements. Similar resultswere observed during phases 2 and 3. At the end of phase 2, the pigs in the70–100 sequence did not display any compensatory response, given that theirADFI, ADG, and average daily protein deposition did not differ from those ofthe pigs in the 100–100 sequence. Similar results were observed during phase 3.Although no compensatory growth was observed during the growing phases, thefact that the pigs in the 70–100–100 treatment were able to catch up in termsof BW and body protein mass to the pigs in the 100–100–100 sequence couldindicate that a small degree of compensation did occur; these research resultscannot ascertain that any compensatory growth occurred.

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