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菜籽饼在3周龄～5周龄肉鸭日粮中适宜用量的研究 总被引：2，自引：1，他引：1
将300只14日龄樱桃谷鸭随机分成5组 ,每组3个重复 ,每个重复20只。5个组分别饲喂营养水平相同 ,菜籽饼用量分别为0 %、6 %、9 %、12 %和15 %的日粮 ,进行21d的饲养试验。结果表明 :菜籽饼的用量在0 %～12 % ,对鸭的日增重、料肉比、采食量、甲状腺重量和甲状腺指数均无显著影响 (P>0.05) ,但15 %的菜籽饼却极显著降低日增重、提高料肉比 (P<0.01) ,甲状腺重量和甲状腺指数也极显著增大 (P<0.01) ;0 %～15 %菜籽饼的使用对肉鸭的屠宰性能没有影响 (P>0.05)。因此 ,肉鸭日粮中菜籽饼可用到12 %。 相似文献
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在羊育肥中用水洗法和深埋法对菜籽饼进行脱毒处理后按不同比例饲喂,通过对照试验结果显示,用水洗法脱毒处理的菜籽饼按10%、15%、20%饲喂3组平均日增重为0.189kg,用深埋法脱毒处理的菜籽饼按10%、15%、20%试验组平均日增重为0.214kg,深埋法比水洗法增重高11.7%,增重较明显(P0.05),料重比深埋法组平均为8.45比水洗法9.51低11.15%(P0.05),可见用不同脱毒方法处理菜籽饼饲喂羊,在羊的增重、饲料转化率等方面具有不同的影响,所以在家畜饲粮配合中应用菜籽饼时,对其脱毒的效果和饲喂量对家畜的增重攸关重要。 相似文献
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试验旨在评估高温加工过程对菜籽饼品质的影响及其在肉鸡日粮中的应用价值,首先对菜籽饼的品质进行了检测分析,然后采用单因子随机分组设计,选取30日龄矮脚黄公鸡270只,随机分为3组(对照组和试验1、2组),每组3个重复,每个重复30只鸡,各试验组分别在基础日粮中添加0%、4%、8%的菜籽饼,试验为期4周。结果表明,菜籽饼由于经过高温热榨处理,颜色呈深褐色,蛋白质溶解度降低至17.09%,中性洗涤纤维含量升高至42.98%,赖氨酸、精氨酸等氨基酸含量均不同程度降低。试验期末,试验1组、试验2组与对照组相比,肉鸡的体重、日采食量、平均日增重、料重比差异均不显著(P>0.05),但试验1组料肉比有所降低,且鸡饲料成本最低,表现出较好的经济效益。由此可见,菜籽饼品质虽有一定程度下降,但在肉鸡日粮中添加适宜用量可一定程度提高经济效益。 相似文献
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本试验旨在研究发酵兔粪对生长獭兔饲喂效果的影响,选择35日龄的断奶力克斯兔80只,随机分成4组.试验Ⅰ、Ⅱ、Ⅲ组分别以15%、20%、25%的发酵兔粪添加到基础日粮中,以发酵兔粪零添加量为对照组.结果表明,与对照组相比,饲喂发酵兔粪组末重和日增重均差异不显著(P>0.05);Ⅰ、Ⅱ、Ⅲ组采食量差异极显著(P<0.01);试验Ⅰ、Ⅱ、Ⅲ组耗料增重比均低于对照组,营养物质消化率均高于对照组,其中,粗纤维的消化率与对照组相比,差异极显著(P<0.01).另外,日粮中添加发酵兔粪对獭兔的被毛品质无不良影响.由此可见,獭兔日粮中添加一定量的发酵兔粪,可提高饲料的养分消化率,使獭兔获得较好的生产性能. 相似文献
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本试验旨在研究菜籽饼对鹌鹑产蛋性能、血清生化指标、蛋品质及蛋黄脂肪酸组成的影响,以探索鹌鹑日粮中菜籽饼的适宜用量。试验选用13周龄的"神丹1号"鹌鹑360只,随机分为3组,每组6重复,每个重复20只,分别饲喂添加0、5%和10%菜籽饼的等能等氮日粮,预试期7 d,试验期35 d。结果表明:与对照组相比,添加5%和10%菜籽饼对鹌鹑的产蛋率、平均日采食量无显著影响(P0.05),但显著降低了鹌鹑平均蛋重(P0.05);添加10%菜籽饼显著增加了鹌鹑料蛋比和破蛋率(P0.05),并显著降低了蛋壳厚度(P0.05);添加5%和10%菜籽饼对血清谷丙转氨酶、谷草转氨酶、总蛋白、白蛋白、球蛋白、游离三碘甲状腺原氨酸、游离甲状腺素、甘油三酯、总胆固醇、高密度脂蛋白、低密度脂蛋白、总超氧化物歧化酶活及丙二醛含量均未产生显著影响(P0.05),但10%菜籽饼组总抗氧化能力显著低于对照组(P0.05),谷胱甘肽过氧化物酶活性显著低于5%菜籽饼组(P0.05);添加5%菜籽饼显著降低了鹌鹑蛋黄中C16:1、增加C18:2和C18:3含量(P0.05),添加10%菜籽饼可显著提高鹌鹑蛋黄C18:2、C20:5和ω-3多不饱和脂肪酸含量(P0.05);添加5%和10%菜籽饼可显著增加蛋黄中总多不饱和脂肪酸,减少单不饱和脂肪酸含量(P0.05)。综上,在鹌鹑日粮中添加5%菜籽饼对鹌鹑产蛋率、平均日采食量、料蛋比、蛋品质及机体健康无显著影响,且可改善蛋黄脂肪酸组成。 相似文献
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为研究微生物混菌固态好氧发酵菜籽饼并评价其在肥育猪上的营养价值,选择植物乳杆菌和蜡样芽孢杆菌混菌固态好氧发酵菜籽饼,制得发酵菜籽饼,选择3头(75±1.34)kg健康回肠末端安装"T"型瘘管的杜长大杂种阉公猪,采用指示剂法进行氨基酸回肠末端消化率试验;试验期共3期(27 d),每期试验包括4 d预试期、3 d粪尿收集期和2 d回肠食糜采集期,在3个时期内依次饲喂普通菜籽饼、发酵菜籽饼和酪蛋白为唯一蛋白质来源的半纯合饲粮,在各试验期内3头猪饲喂相同饲粮,酪蛋白用于测定内源氮损失,对发酵菜籽饼进行营养价值评定。结果显示,最优发酵条件下测得硫苷、异硫氰酸酯和唑烷硫酮的降解率分别为67.26%、60.38%和53.24%,粗蛋白质和小肽含量分别提高2.74和2.4个百分点。发酵菜籽饼组的消化能和代谢能分别为12.11和10.99 MJ/kg,显著高于普通菜籽饼组。发酵菜籽饼组的干物质和粗蛋白质的表观消化率比普通菜籽饼组分别显著提高7.67%和13.66%;回肠粗蛋白质表观消化率和真消化率分别为79.38%和86.67%,均显著高于普通菜籽饼组。除缬氨酸、苯丙氨酸、精氨酸和胱氨酸外,发酵菜籽饼组必需氨基酸和非必需氨基酸的回肠表观和真消化率均显著高于普通菜籽饼组(P0.05)。说明混菌固态发酵有效地改善了菜籽饼的饲用品质,显著提高了菜籽饼养分消化利用率。 相似文献
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菜籽饼经蒸煮脱毒后 ,其中有毒成分异硫氰酸酯由 4 371mg/ g降到 0 830mg/ g ,口恶唑烷硫酮由 1 0 70mg/ g降到 0 74 5mg/ g。用蒸煮脱毒菜籽饼作蛋白饲料配制全价日粮与含大豆、鱼粉等蛋白饲料的全价日粮饲喂生长肥育猪作对比试验。结果表明 ,在日粮中添加 15%的蒸煮脱毒菜籽饼 ,试验组平均日增重 677 0 0 g± 35 59g ,与对照组平均日增重 685 0 0 g± 34 2 5g相比 ,差异不显著(P >0 0 5) ;料肉比试验组 3 57∶1;每增重 1kg较对照组降低饲料成本 14%。试验表明 ,用蒸煮脱毒菜籽饼可替代大豆、鱼粉饲喂生长肥育猪 ,对猪无毒副作用 ,经济效益显著 相似文献
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发酵菜籽饼蛋白饲料,蛋白质含量高达45.38％,适口性好,用其取代饲料中鱼粉(3组)、豆粕(2组),或作为猪饲粮中唯一蛋白质饲料源(1组)饲喂瘦肉型生长肥育猪,与含鱼粉 豆粕的饲粮(4组)比较,日增重差异不显著(P>0.05)。即使日粮中配以高达27.5％的发酵菜籽饼蛋白饲料,猪只仍采食正常,无任何肉眼可见的中毒症状。经屠宰测定,1—3组胴体瘦肉率、背膘厚度、眼肌面积和后腿比例等指标,与4组比差异均不显著(P>0.05)。说明用发酵菜籽饼蛋白饲料部分或完全代替饲粮中的鱼粉、豆粕喂猪,有安全、等效、来源广、成本低的效果。 相似文献
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Evidence for the non-involvement of the uterus in the lifespan of the corpus luteum in the cyclic dog 总被引：1，自引：0，他引：1
Progesterone levels in peripheral blood of dogs were analysed during the cycle in which hysterectomy (n = 5) or sham surgery (n = 3) was performed as well as during the cycle of dogs (n = 5) hysterectomized at least one year prior to this study; the data were compared with the findings in control dogs (n = 3). The averages of the duration of the luteal period observed in the three experimental groups were not significantly different from those of control dogs. Immediately after surgery, the progesterone level decreased from 25 to 50% of the presurgical level, but returned to presurgical level in about four days. Prolactin levels were elevated for about 30 h after surgery. Nevertheless, the averages of the mean prolactin levels for each animal during the luteal period of the experimental groups were not significantly different from those of control dogs. It is concluded that in the dog, the uterus is not involved in the lifespan of the cyclic corpus luteum. 相似文献
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Meschan EM Peham C Schobesberger H Licka TF 《Veterinary journal (London, England : 1997)》2007,173(3):578-584
As there is no statistical evidence that saddle fit influences the load exerted on a horse's back, this study was performed to assess the hypothesis that the width of the tree significantly alters the pressure distribution on the back beneath the saddle. Nineteen sound horses were ridden at walk and trot on a treadmill with three saddles differing only in tree width. Kinetic data were recorded by a sensor mat. A minimum of 14 motion cycles were used in each trial. The saddles were classified into four groups depending on fit. For each horse, the saddle with the lowest overall force (LOF) was determined. Saddles were classified as "too-narrow" if they were one size (2 cm) narrower than the LOF saddle, and "too-wide" if they were one size (2 cm) wider than the LOF saddle. Saddles two sizes wider than LOF saddles were classified as "very-wide". In the group of narrow saddles, the pressure in the caudal third (walk 0.63 N/cm(2)+/-0.10; trot 1.08 N/cm(2)+/-0.26) was significantly higher compared to the LOF saddles (walk 0.50 N/cm(2)+/-0.09; trot 0.86 N/cm(2)+/-0.28). In the middle transversal third, the pressure of the wide saddles (walk 0.73 N/cm(2)+/-0.06; trot 1.52 N/cm(2)+/-0.19) and very-wide saddles (walk 0.77 N/cm(2)+/-0.06; trot 1.57 N/cm(2)+/-0.19) was significantly higher compared to LOF saddles (walk 0.65 N/cm(2)+/-0.10/ 0.63 N/cm(2)+/-0.11; trot 1.33 N/cm(2)+/-0.22/1.27 N/cm(2)+/-0.20). This study demonstrates that the load under poorly fitting saddles is distributed over a smaller area than under properly fitting saddles, leading to potentially harmful pressures peaks. 相似文献
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嗅源是军犬嗅觉作业训练的依据.军犬鉴别中嗅源能力的培养在整个鉴别训练中占有重要地位,关系到鉴别训练的成败和鉴别能力的提高.所以,军犬在嗅认嗅源时必须按照训犬员的指令充分、细致地感受嗅源气味,并且对嗅源气味产生兴奋反应.如何培养军犬充分嗅认嗅源以及及时解决嗅认过程中出现的问题,成为我们进行鉴别训练的关键.…… 相似文献
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