Impact of metabolic status of sows around the farrowing on stillbirth, pre-weaning mortality and as diagnostic tools of the metabolic state of lactating sows

母猪分娩前后代谢状态对死产、断奶前死亡率的影响以及作为泌乳母猪代谢状态的诊断工具

• 批准号: 514533-2017
• 负责人: Guay, Frédéric
• 金额: $ 2.29万
• 依托单位: Université Laval
• 依托单位国家: 加拿大
• 项目类别: Collaborative Research and Development Grants
• 财政年份: 2017
• 资助国家: 加拿大
• 起止时间: 2017-01-01 至 2018-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=619125
• 关键词: Impact; metabolic; status; sows; around

The general purpose of this project is to study metabolic status of sows and nutritional strategy around thefarrowing on lactating sow performances. Specifically, the objectives are 1- to evaluate the effect of dietarystrategy on incidence of stillbirth in relation with duration of farrowing and birth interval; 2- to determine therelationship between the metabolic status of the lactating sow before and after farrowing as well as duringlactation, and the growth of the litter during lactation, feed intake of lactating sows and reproductiveperformance at the next litter; 3- to develop a model from metabolic status and body parameters of sows topredict feed intake, litter growth and reproductive performance at the next litter. In fact, even if it is known thatfeed intake of lactating sows can affect their litter performances and long-term reproductive performances, theeffect of metabolic status (lipid and protein mobilisation and glucose utilization) of sows on the feed intake arenot clearly known. The pre-farrowing conditions of sows, like over fat deposition and constipation, are knownto affect farrowing process, and stillbirth and alive piglets per litter, but other factors, as calcium status, whichcould affect uterine contraction and then dystocia, may be determining in farrowing process and then pigletsurvival around the farrowing. The results obtained in this project will have a short and long-term impact onsow performances, including a reducing stillbirth, better piglet survival and litter growth. This project will alsoopen several areas of investigation that will allow to understand the underlying control mechanisms of feedintake in lactating sows, which is a determining factors of litter performances and long-term reproductiveperformances. Finally, by developing new predicting model this project will contribute to using moreefficiently farm resources and develop farming techniques to maintain the competitiveness of Canadian swineindustry.

本研究旨在探讨母猪的代谢状况及分娩前后的营养策略对泌乳母猪生产性能的影响。本研究的主要目的是：1.评价日粮策略对死胎发生率与分娩时间和分娩间隔的关系，2.确定泌乳母猪分娩前后和泌乳期间代谢状况与泌乳期间窝仔生长、泌乳母猪采食量和下一窝繁殖性能的关系; 3.根据母猪的代谢状况和体尺参数建立模型，预测母猪的采食量、窝仔生长和下一窝的繁殖性能。事实上，即使知道泌乳母猪的采食量会影响其产仔性能和长期繁殖性能，母猪的代谢状态（脂质和蛋白质动员以及葡萄糖利用）对采食量的影响也不清楚。母猪分娩前的状况，如过度脂肪沉积和便秘，已知会影响分娩过程，以及每窝死胎和活仔猪，但其他因素，如钙状态，可能会影响子宫收缩，然后难产，可能会在分娩过程中决定，然后分娩前后仔猪的存活率。本项目所取得的成果将对母猪的生产性能产生短期和长期的影响，包括减少死胎，提高仔猪存活率和窝仔生长率。该项目还将开辟几个调查领域，以了解哺乳母猪采食量的潜在控制机制，这是产仔性能和长期繁殖性能的决定因素。最后，本计画将借由发展新的预测模式，以协助更有效率地利用农场资源及发展农场技术，以维持加拿大养猪业的竞争力。