共查询到19条相似文献,搜索用时 46 毫秒
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泌乳期间的低采食量会导致母猪体储备的过度损失而显著降低体重和背膘储备 ,延长断奶到重新交配的时间 ,降低妊娠率和产仔数 ,缩短母猪的使用年限。母猪泌乳期间的饲喂水平也会影响仔猪的生产性能 ,母猪泌乳期间饲料消耗同产奶量直接相关 ,采食量增加 ,产奶量也会有较大提高 ,产奶量的高低会影响哺乳仔猪的生长速度。提高母猪泌乳期饲料采食量的方法之一是确保母猪妊娠期间不要过度饲喂。母猪泌乳期的饲料采食量和妊娠期的饲料采食量呈负相关 ,妊娠期的饲料采食量增加 ,泌乳期的饲料采食量则下降。因此 ,妊娠期的饲料采食量应减少 ,否则妊娠… 相似文献
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与人类一样,分娩对于母猪是一件大事,特别是在分娩之后,体况和食欲很容易出现异常,所以在管理上更应加倍小心。总之,分娩后的母猪因为要:①给哺乳仔猪授乳,②恢复因分娩造成的体力消耗,③修复带伤的子宫和卵巢,④维持自己的生命,以及⑤1~2产母猪还处于生长发育过程等种种 相似文献
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崔立 《上海畜牧兽医通讯》2000,(4):26-28
哺乳母猪是一个猪场管理的核心 ,它的管理水平直接影响全场生产效益的高低。首先要考虑哺乳母猪营养需要的特点 ,母猪除维持机体正常代谢和增长体组织外 ,还要泌乳哺育仔猪 ,泌乳量和乳中的组成成分取决于饲料中营养成分的供给数量 ,而泌乳量和乳的质量又直接影响仔猪断奶体重和存活率。大量科学研究和实践表明 ,最大限度地提高泌乳期饲料采食量可以提高泌乳量和以后的繁殖性能。因此 ,多数营养学家和养猪生产者致力于开发提高母猪采食量的措施。本文将阐述饲料采食量对母猪及其繁殖性能的影响以及如何提高饲料采食量等问题。1 哺乳期母猪… 相似文献
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研究证明,泌乳母猪采食量随季节变化而改变。一年中以6,7,8,9月4个月份气温较高,采食量较低。哺乳母猪的生产性能受到很大影响,尤其是高产母猪。1采食量下降引发一系列不良后果1.1繁殖性能方面当哺乳母猪采食量不足时,母猪将动员自身的脂肪贮备以平衡每日生产所需能量的供应不足。如果环境温度比母猪的最适温度(18~20℃),每升高1℃,则平均减少采食量3.5%。这样会使其繁殖性能出现不同程度的恶化,表现为发情时间延长或不发情,下一胎产仔数少等。1.2生长潜力不能很好发挥研究表明,环境温度比最适温度(18~20℃)每升高1℃,泌乳量降低2.3%。出… 相似文献
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胡少昶 《国外畜牧学(猪与禽)》2005,25(1):12-13
近数十年来,窝产仔数以及每头母猪的年产仔猪数一直都逐渐增加,生产率的这一提高也增加了母猪的产奶量。还有报告说,吮乳频率和产奶量随窝产仔数的增加而直线增加。 相似文献
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The effects of the daily frequency of feed distribution (once, One; twice, Two; and four times, Four,) on the rate of feed consumption (RFC) and reproductive performance were investigated in Large White sows farrowing in the hot season from June to September (H sows) and in the rest of the year (R sows). The RFC was greater in feeding treatment Four than Two (P < 0.01) in H sows; however, bodyweight loss during lactation was not affected by the feeding treatment. No difference in effects of frequency of feed distribution for sows was observed on piglet growth. The survival rate of the piglets was not different between feeding treatments. The number of sows that came into estrus within 7 days post‐weaning was smaller in the feeding treatment Four than One (P < 0.05) in H sows and those of Four than One (P < 0.01) and Two (P < 0.05) in R sows. These results suggest that in sows during lactation increasing the daily frequency of feed distribution may have a negative effect on reproductive performance. 相似文献
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文章评估了哺乳期间母猪的饲喂频率(2或3次/d)对母猪体况、繁殖性能及仔猪生长性能的影响.试验选择68头母猪,随机分为8组(每组8~10头母猪),哺乳期间其中4组母猪每天饲喂2次,另外4组每天饲喂3次,母猪分为青年母猪(<2胎次)和老龄母猪(≥3胎次),试验结束后记录母猪体况评分、肩部组织病变、发情率、母猪生产及仔猪生... 相似文献
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Forty‐five multiparous sows (Landrace × Yorkshire; parity: 3.58 ± 1.30) were used to determine the effects of three patterns of feed intake during early lactation on the performance of lactating sows. Experimental treatments were as follows: IFI‐1.4, the amount of feed increased by 1.4 kg per day for the first 5 days post‐farrowing, followed by ad libitum feeding until weaning; IFI‐1.0, the amount of feed increased by 1.0 kg per day for the first 7 days post‐farrowing, followed by ad libitum feeding until weaning; IFI‐0.7, the amount of feed increased by 0.7 kg per day for the first 10 days post‐farrowing, followed by ad libitum feeding until weaning. The number of live piglets at birth/litter in three dietary treatments was 11.50, 10.07, and 10.85, respectively. Sows in the IFI‐1.4 treatment had lower backfat loss during lactation, greater daily feed intake during days 1–6, 7–12, and 1–24 compared with those in the IFI‐0.7 treatment (p < .05). The litter weaning weight, litter weight gain, and average litter daily gain in the IFI‐1.4 treatment were greater compared with those in the IFI‐0.7 treatment (p < .05). In conclusion, the results indicated that the IFI‐1.4 feed intake pattern allowed lactating sows and their litters to obtain optimal performance. 相似文献
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S. Yoosuk H. B. Ong C. A. Morgan C. T. Whittemore 《Acta Agriculturae Scandinavica, Section A - Animal Sciences》2013,63(4):168-186
Abstract The main goal of this simulator is to predict voluntary feed intake based on the effects of temperature and stocking density. The model indicates the limiting factors relative to diet (protein, energy or ash), housing environmental conditions and stocking density. The concepts of compensatory protein growth, correction of lipid growth, the desired feed intake to meet energy, protein and ash requirements, and influences of stocking density, genotype and sex are also introduced in this model. This study draws a flow chart and steps to predict feed intake of a growing pig to make it clear how the model works. The model simulates the outcomes of feed intake, energy and protein requirements for maintenance, the energy cost for cold thermogenesis, and protein and lipid retention on a daily basis until slaughter weight. This model was also validated by comparison with published experiments. 相似文献
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[目的]探讨热应激对奶牛采食量和饲料中营养物质消化率的影响。[方法]通过采用单因子水平随机设计。[结果]奶牛热应激时采食量显著下降,在轻微和中度热应激期采食量分别下降3.65%和13.46%;营养物质的消化率也显著下降(P0.05),奶牛在轻度和中度热应激期粗脂肪的消化率分别降低了6.17%、13.03%;钙的消化率分别降低了25.09%、34.97%;磷的消化率分别降低了22.77%、36.27%。[结论]奶牛热应激时采食量显著下降(P0.05);饲料中营养物质消化率粗脂肪、钙、磷的消化率与非热应激期相比,差异显著(P0.05)。 相似文献
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通过对集约化养猪场仔猪腹泻原因,症状表现的分析,提出规模化养殖场在仔猪培育方面应注意避免仔猪的环境应激,病源菌的感染和母猪料的不合理更换,从而提出防止哺乳母猪患病,仔猪饮水不足和仔猪料配制使用不合理等问题,强调加强母猪饲养,提高仔猪抗病力,合理使用乳猪料是防止仔猪腹泻的关键,并提出了治疗仔猪腹泻的措施。 相似文献
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研究流食与颗粒料不同方式对断奶仔猪增重和采食量,选择杜长大三元杂种28日龄仔猪,随机区组设计,共六个区组,每窝一个区组,每个区组四头猪,分为处理组2头和对照组2头。28日龄体重:试验组7.19±0.027 Kg,对照组7.19±0.031 Kg。处理组和对照组均自由采食,自由饮水,35日龄晨称个体重,结果给予流食比使用颗粒料提高仔猪采食量33g/d(P<0.05)和日增重17.6g/d(P<0.05)。仔猪早期断乳是提高母猪生产力和规模化养猪业中的关键技术之一,现代规模养猪业已把乳猪断奶日龄提至21~28 d。 相似文献