共查询到19条相似文献，搜索用时 250 毫秒
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本文通过对猪栏内添加不同物理特征异物和断尾处理，对断奶仔猪的啃咬行为及其生产性能的影响进行了研究。试验中选择35－40日龄大白猪及长白猪断奶仔猪各6窝，从每窝选出健康均匀仔猪6头，转群后放入一栏，公母各占一半。其中两个品种有2窝在出生后进行了断尾。试验分三个处理组：T1，断层组；T2，异物组一，在猪栏内放置篮球；T3，异物组二，在猪栏栅栏近地面处拴系三角皮带。每个试验组包括两上品种各两窝仔猪。试验使用摄像机，采取即时性观察方法进行观察。记录每日的采食量和仔猪试验前后的体重以计算日增重和饲料效率。试验结果表明，在猪栏内放置异物增加仔猪对添加异物进行探求和啃咬的时间。异物在栏内的位置不同对断奶仔猪咬尾行为、咬耳行为、咬蹄行为和啃栏行为等行为的影响不同。断尾也可以避免咬尾行为的发生，且有利于日增重和饲料效率的提高。 相似文献
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异物特征和断尾处理对断奶仔猪啃咬行为及其生产性能的影响 总被引：1，自引：0，他引：1
本文通过在猪栏内添加不同物理特征异物和断尾处理 ,对断奶仔猪的啃咬行为及其生产性能的影响进行了研究。试验中选择 35～ 40日龄大白猪及长白猪断奶仔猪各 6窝 ,从每窝选出健康均匀仔猪 6头 ,转群后放入一栏 ,公母各占一半。其中两个品种各有 2窝在出生后进行了断尾。试验分三个处理组 :T1 ,断尾组 ;T2 ,异物组一 ,在猪栏内放置篮球 ;T3,异物组二 ,在猪栏栅栏近地面处拴系三角皮带。每个试验组包括两个品种各两窝仔猪。试验使用摄像机 ,采取即时性观察方法进行观察。记录每日的采食量和仔猪试验前后的体重以计算日增重和饲料效率。试验结果表明 ,在猪栏内放置异物增加仔猪对添加异物进行探求和啃咬的时间。异物在栏内的位置不同对断奶仔猪咬尾行为、咬耳行为、咬蹄行为和啃栏行为等行为的影响不同。断尾也可以避免咬尾行为的发生 ,且有利于日增重和饲料效率的提高。 相似文献
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集约化生产条件下断奶仔猪咬尾行为为发育的观察 总被引：1，自引：1，他引：0
本试验对６０头断奶仔猪进行６周的持续观察，旨在探讨集约化生产条件下，咬尾等几种与仔猪啃咬有关的行为随着年龄增长的变化趋势。结果发现，断奶仔猪的啃物行为随年龄增长显著下降，咬尾行为随年龄增长显著上升，而且强度逐渐加大，特别是当尾巴被同伴咬破以后频率及强度上知更快，雌性咬尾多于雄性。咬耳、咬蹿行为没有明显变化趋势。 相似文献
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复合酶制剂在断奶仔猪日粮中的饲养效果试验 总被引：1，自引：0，他引：1
在断奶仔猪日粮中添加复合酶制剂可明显改善仔猪对饲料的利用率 ,提高日增重。经杜大长断奶仔猪 5窝 4 6头的对照试验 ,表明日增重可提高 31个百分点 ,饲料成本下降 12个百分点 ,效果显著 ,值得推广。 相似文献
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断奶仔猪日粮添加猪油效果试验 总被引：2，自引：0，他引：2
断奶仔猪日粮添加猪油效果试验石旭东（兰州猪场甘肃兰州７３００３０）前言近年来，国内外对畜禽饲料中添加脂肪极为重视，已进行了大量研究。据国内外报道，在断奶仔猪日粮中添加一定量的动物或植物油脂可提高日增重，降低饲料消耗和仔猪死亡率等。为研究在断奶仔猪日粮... 相似文献
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改变饲养方法控制断奶仔猪腹泻的研究 总被引：1，自引：0，他引：1
将36窝430头仔猪随机分为两组以观察改变饲养方式对断奶仔猪腹泻及生产性能的影响，结果表明母猪哺乳后期控制饲料投放量和仔猪早期人工强制补料能明显减少断奶仔猪腹泻的发病率，提高35日龄断奶仔猪的各日龄采食量（DFI）、体重（BW）和日增重（DG）。 相似文献
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《饲料研究》2014,(17)
试验旨在研究饲料中不同添加剂量的钼酸钠对断奶仔猪生长性能和血液相关激素的影响。试验将96头雄性断奶仔猪随机分为4组,其中试验I组为对照组,试验Ⅱ、Ⅲ和Ⅳ组饲料中分别添加10、20、50 mg/kg的钼(Mo)(以Na2MoO4·2H2O的形式),以研究各组断奶仔猪日增质量、料重比及类胰岛素生长因子I(IGF-I)、睾酮(T)、三碘甲腺原氨酸(T3)和甲状腺素(T4)的质量浓度影响;结果试验II组的平均日增质量较对照组提高9.4%,采食量较对照组提高5.4%。日粮钼(Mo)水平对T3和T4水平无影响(P0.05);Mo提高IGF-I和T的分泌(P0.05)。 相似文献
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通过对哺乳仔猪和断奶仔猪饲料中,添加不同量的寡聚饲喂试验。结果表明：在仔猪哺乳期,添加１％寡聚糖能显著降低仔猪腹泻率（Ｐ〈０．０５）,但对仔猪日增重和采食量无显著影响;仔猪断奶后,添加０．１％寡聚糖能显著提高仔猪日增重和饲料报酬（Ｐ〈０．０５）,。减少腹泻率提高饲喂效果。建议在断奶仔猪饲料中添加０．１％寡聚糖,可获较好饲喂效果和效益。 相似文献
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本研究旨在明确影响肉兔断奶后窝生长性状和料肉比的重要因素。利用一般线性模型分析了来自5个不同肉兔品种(新西兰白兔,加利福尼亚兔,比利时兔,青紫蓝兔和福建黄兔)的909只173窝肉兔断奶后窝生长和料肉比性状。结果表明,品种和断奶数对断奶窝重(5周龄窝重),窝增重,窝上市体重(10周龄窝重),个体平均上市体重,窝采食量和料肉比的影响极显著(P<0.01)。出生月份对窝采食量影响极显著(P<0.01),对断奶窝重和窝上市体重的影响显著(P<0.05)。比利时兔的断奶窝重、窝增重、窝上市体重、窝采食量和平均上市体重显著高于其他品种,而福建黄兔的上述5项指标显著低于其他品种(P<0.05)。断奶数与断奶窝重、窝采食量、窝增重、窝上市体重和料肉比的回归系数为正且显著。品种、断奶数和出生月份是影响肉兔断奶后窝性状和料肉比的重要因素。本研究的结果为将比利时兔作为杂交的终端父本提供重要依据。 相似文献
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从菠萝皮中提取多糖,研究菠萝多糖对断奶仔猪生长性能的影响。选取日龄相近的断奶仔猪160头,平均体重为（6.50±0.07） kg,公母各半。采取单因子完全随机分组设计,分为4个组,每组4个重复,每个重复10头,1个对照组,3个试验组,4个组间体重差异不显著（P＞0.05）。对照组只喂基础日粮,试验1组、试验2组、试验3组分别在基础日粮中添加菠萝多糖饲料添加剂50、100、150 g/t。结果表明,菠萝多糖对断奶仔猪的平均日增重和料重比均有显著影响。试验1组、试验2组和试验3组平均日采食量均略低于对照组,各组间无显著差异(P＞0.05)。试验1组、试验2组和试验3组的平均日增重比对照组分别提高8%(P＜0.05)、15%(P＜0.01)、7%(P＜0.05)。试验1组、试验2组和试验3组料重比比对照组分别降低了9.62%(P＜0.05)、14.42%(P＜0.01)、7.21%(P＜0.05)。因此,在断奶仔猪日粮中添加菠萝多糖能提高断奶仔猪的生产性能和抗病力,且最佳添加量为100 g/t。 相似文献
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Abstract The effect of early rearing environment and tail docking on behaviour and production of fattening pigs was investigated in 576 cross-bred pigs. Half of the pigs came from four commercial pig units with tethered or otherwise confined sows, 4 weeks' weaning, little space per piglet and no use of straw. The other half of the pigs came from another four commercial units with loose-housed sows, 5-6 weeks' weaning and liberal space and use of straw. Half of the piglets from each of the units were tail docked. At an average weight of 33.5 kg the pigs were transferred to environmentally rich experimental pens where they stayed until slaughter at approx. 100 kg liveweight. On 8 observation days evenly distributed during the fattening period the pigs' use of the straw sections of the experimental pens was recorded as well as oral activities directed towards pen mates, including tail biting. The pigs' use of the pen's straw section declined significantly (p < 0.005) during the fattening period. The rearing environment had a significant effect on nibbling on pen mates (p <0.04) but not on tail biting. The nibbling on pen mates decreased (p < 0.02) while tail biting increased (p < 0.03) during the fattening period. The tail status had no significant effect on either of the two behavioural parameters. Neither rearing environment nor tail status influenced the relative growth rate. Pigs recruited from the “barren” environment showed an almost statistically significant higher incidence of chronic pleuritis (p = 0.069). 相似文献
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Water intake of weaned piglets from three to seven weeks old 总被引：2，自引：0，他引：2
One hundred and two large white cross landrace piglets weaned at 21 (+/- 1) days old were randomly allocated to one of two commercial early weaning diets for a four week growth trial. The piglets were housed in groups of between six and 10. After initial moderate restriction the piglets were fed ad libitum. Food intakes and weight gains were recorded weekly. Water consumption of individual pens of piglets was recorded daily. Dietary treatment had no significant effect on mean daily feed intake, daily liveweight gain or food conversion ratio. The relationship between water and food intake, piglet weight and daily gain was examined using regression and multiple regression analyses. Water intake was related to all these parameters, with daily feed intake being the best single predictor of water intake. The relationship was described by the equation: water intake (litres/day) = 0.149 + 3.053 feed intake (kg/day). 相似文献
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Mandy M Lingbeek Klaudyna Borewicz Erica Febery Yanming Han John Doelman Sandra J A van Kuijk 《Journal of animal science》2021,99(11)
This study examined the effect of a water acidifier containing free and buffered short-chain fatty acids (SCFA-WA) on growth performance and microbiota of weaned piglets. In total, 192 male piglets, approximately 4 wk of age, were allocated to 24 pens (12 per treatment) with 8 piglets per pen. The piglets received either regular drinking water (negative control) or drinking water with the acidifier supplied at 2 L/1,000 L. Body weight and feed intake were measured weekly on pen level. During the first 2 wk, daily visual assessment and scoring of the feces was conducted. Fecal samples of three piglets per pen were collected on days 14 and 42 for high-throughput sequencing analysis of the microbiota. Piglets offered SCFA-WA had significantly improved feed efficiency in the third week (P = 0.025) and over the whole study period (days 0 to 42, P = 0.042) compared with piglets in the negative control group, with a strong tendency observed during the first feeding phase (days 0 to 21, P = 0.055). Furthermore, the water acidifier group had a higher water intake than piglets provided with control water during the second feeding phase (days 21 to 42, P = 0.028) and over the whole study period (days 0 to 42, P = 0.043). There was no significant difference in body weight, average daily gain, or average daily feed intake (days 0 to 21, 21 to 42, 0 to 42). Furthermore, there was no overall significant difference in fecal scoring between the treatments. In terms of the fecal microbiota response, piglets offered the water acidifier showed a significantly higher relative abundance (RA) of genus Clostridium sensu stricto 1 and a lower RA of genus Streptococcus compared to the control. Furthermore, the redundancy analysis showed a positive association between improved feed efficiency and daily weight gain and RA of Butyricicoccus and Faecalibacterium. In conclusion, consumption of the water acidifier containing free and buffered SCFA modulated the microbiota and improved feed efficiency in piglets. 相似文献
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选用360头21日龄断奶仔猪,按制粒工艺、原料预处理不同设计2因素2水平试验,研究二次制粒颗粒饲料对断奶仔猪培育阶段生长性能的影响。结果:试验全期,采用二次制粒工艺及膨化玉米、膨化豆粕原料的处理组4,仔猪体重、平均日增重、饲料转化效率显著优于(P<0.05)其他3组。处理组4仔猪42日龄的血清尿素氮和皮质醇浓度显著低于其他3个处理组。试验表明,在选择膨化玉米与膨化豆粕优质饲料原料的基础上,采用二次制粒工艺,尤其先将鱼粉与膨化玉米、膨化豆粕进行第一次高温制粒,对降低应激、改善仔猪培育阶段的生长性能有良好的效果。 相似文献
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The importance of a high feed intake during lactation of primiparous sows nursing large litters 总被引：4，自引：0，他引：4
Eissen JJ Apeldoorn EJ Kanis E Verstegen MW de Greef KH 《Journal of animal science》2003,81(3):594-603
The objective of this study was to investigate whether nursing a large number of piglets has negative effects on lactation and postweaning performance of primiparous sows and whether a greater lactation feed intake can prevent possible negative effects. Data were recorded on 268 ad libitum-fed sows of three genotypes (G1, G2, and G3) in an experiment where litter size was standardized to 8, 11, or 14 piglets during a 4-wk lactation. Compared to G1 and G2, G3 sows were heavier (P < 0.05) and leaner (P < 0.05) at weaning of their litters, lost similar amounts of BW and backfat, and their piglets grew faster (P < 0.05). Compared to G1, feed intake during lactation was higher for G3 sows (P < 0.05), and their risk of a prolonged weaning-to-estrus interval was lower (P < 0.01). Daily feed intake by sows was not affected by litter size in G1 and G3, but it was quadratically affected in G2 (P < 0.05), with a maximum at 10.8 piglets. Backfat loss of the sows increased linearly with litter size (P < 0.05) in G1 and G3. In G2, backfat loss increased only at litter sizes > 9.8 piglets (P < 0.01). Body weight loss of the sow and litter weight gain increased linearly with litter size (P < 0.001). Per extra piglet nursed, sows had a 23% (P < 0.01) higher probability of a prolonged weaning-to-estrus interval. A higher daily feed intake during lactation reduced tissue loss of the sow, increased litter weight gain (P < 0.01), and reduced the probability of a prolonged weaning-to-estrus interval (by 42% per extra kilogram; P < 0.01). Sows with a lower daily body weight loss during first lactation had a larger second litter (1.28 piglets/kg; P < 0.01), and their probability of a prolonged weaning-to-estrus interval was reduced by 61% per kilogram (P < 0.001). With increasing litter size, it is therefore recommended to reduce body weight loss during lactation by stimulating daily feed intake and by genetic selection. 相似文献
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畜牧业是新农村建设的萤要组成部分,加快农区畜牧业发展对于调整农业产业结构,发展农村经济,增加农民收入,加快新农村建设步伐,实现小康社会具有十分重要的意义。当前,随着社会主义市场经济的深入发展和西部大开发战略的有效实施,互助县畜牧业进入了一个新的发展时期,我们既面临着良好的发展条件和机遇,也面临着新的挑战和问题。为抓住机遇,实现畜牧业发展的新突破,推动新农村建设．提出以下建议和思路,以供参考。 相似文献