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本试验旨在探讨精饲料油菜籽水平对肉牛生产性能及肉品质的影响。选取40头体况良好、平均体重为(447.00±35.67)kg的西门塔尔杂交牛,随机分为4组,每组10头,分别饲喂4种不同油菜籽水平[0(对照组)、8.7%、17.6%和26.0%]的精饲料。预试期10d,正试期90d。结果表明:1)17.6%油菜籽组平均日增重最高,比对照组和26.0%油菜籽组分别高6.40%(P>0.05)和15.03%(P<0.05)。2)胴体重、屠宰率及净肉率均随油菜籽水平的增加呈先升高后降低的变化趋势,其中17.6%油菜籽组胴体重显著高于其他各组(P<0.05),对照组屠宰率和净肉率显著低于17.6%油菜籽组(P<0.05)。3)精饲料油菜籽水平对肉牛眼肌面积、大理石花纹、高档肉块重、肉骨比及肉质常规成分均无显著影响(P>0.05)。4)17.6%油菜籽组肉样剪切力最低,显著低于对照组(P<0.05),肉样嫩度最好。综合各项指标,精饲料油菜籽水平为17.6%时,能够显著提高肉牛生产性能和肉品质。 相似文献
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影响棉籽饼有效赖氨酸含量因素的试验研究 总被引:2,自引:0,他引:2
本试验模拟螺旋压榨榨油工艺,测定不同蒸炒或加热条件对棉籽饼中自由棉酚(FG)、还原糖(RS)、有效赖氨酸(A-Lys)含量的影响。对蒸炒前喷洒硫酸亚铁的作用也做了初步探讨。研究发现,加热强度、棉酚结合、还原糖含量与有效赖氨酸含量之间的相关系数分别为-0.9765(P<0.01)、-0.9515(P<0.01)、0.4395(P>0.05);蒸炒前添加FeSO4,按Fe∶FG摩尔比4.5∶1和9∶1时均极显著地(P<0.01)提高A-Lys含量,两剂量组间无差异(P>0.05);按4.5∶1添加FeSO4可提高A-Lys7.60%~37.77%,同时表明,FG含量显著降低。 相似文献
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研究收集检测湖北油菜主产区商品籽的品质,旨在为优质油菜籽的生产和利用提供参考。采集湖北油菜籽主要种植区夏收油菜籽,分别按照国标法检测油菜籽硫甙、芥酸、粗脂肪、粗蛋白质等化学成分含量以及脂肪酸组成,并采用两步消化法检测油菜籽能量、粗脂肪和粗蛋白的动物消化利用率。结果显示:①湖北地区商品油菜籽芥酸和硫甙达标率分别为64.71%和94.12%;②粗脂肪、粗蛋白含量分别为33.10%~45.34%和16.07%~26.93%;③饱和脂肪酸含量为4.9%~6.7%,油酸含量为32.3%~65.1%,亚油酸含量为13.2%~20.2%,亚麻酸含量为8.4%~9.7%;④油菜籽粗脂肪和粗蛋白的消化率分别为62.69%~67.11%和76.53%~81.09%。 相似文献
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选择体重为20kg±2kg的健康杜×长×大生长猪60头,随机分为5处理(每处理3重复,每重复有4头猪),分别饲喂0%、5%、10%、15%、20%膨化全脂油菜籽粉(EFFRM)日粮,各处理日粮中EFFRM以等能等可消化氨基酸基础取代大豆蛋白。试猪自由采食和饮水,试验期40d。试验用全脂菜籽为“双高”品种,采用干法膨化加工。试验结果显示:试猪采食量和日增重随日粮中EFFRM用量的增加呈先上升(5%用量)后明显下降(10%~20%用量)的规律;5%EFFRM处理的采食量和增重在数值上高于0%处理,差异未达显著水平(P〉0.05),但显著高于10%处理(P〈0.05),极显著高于15%、20%处理(P〈0.01):各处理的单位增重耗料(FCR)无显著差异(P〉0.05),在数值上仍以5%、0%处理最低。以上结果表明,20-40kg猪日粮中“双高”来源的EFFRM用量以5%为宜,用量10%及以上会显著影响猪的采食量,降低生长速度。 相似文献
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试验旨在研究揉搓粉碎和微波预处理对玉米秸秆青贮发酵饲料品质的影响.以微波未处理玉米秸秆青贮为对照,以揉搓粉碎不同长度玉米秸秆为试验对象,在不同微波条件下处理不同时间后青贮50 d,分析青贮品质的各项指标.结果显示,揉搓长度为2 cm的玉米秸秆经过微波预处理有助于提高玉米秸秆青贮感官品质,可评定为优等.揉搓长度为2 cm... 相似文献
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1. The effect of 100 g rapeseed meal (RSM)/kg diet on the energy metabolism of hybrid laying hens was examined by indirect calorimetry. Thyroid hormone concentrations, thyroid weight, liver weight and body weight, egg production and food intake were also measured. 2. Fasting heat production was significantly lower in hens receiving RSM than in controls, but this difference disappeared when the birds were fed. 3. Thyroid hormone concentrations decreased, while thyroid and liver weights increased slightly; none of these effects was significant. Body weight, egg production and food intake were unaffected and no liver haemorrhages were noted. 4. The maintenance metabolisable energy (ME) requirement of control and treated birds, estimated from short-term energy balance measurements, was 474 kJ/kg0.75 d; net availability of ME in both treatments was 0.85. 相似文献
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氧化鱼油对鲤鱼(Cyprinus carpio)肉质的影响 总被引:5,自引:0,他引:5
本试验在饲料中添加2%的新鲜鱼油(其过氧化物值(POV)1.28meqO2/kg)和POV(meqO2/kg)分别为118.79、189.37和367.86的氧化鱼油,并在新鲜鱼油和POV为118.79meqO2/kg的氧化鱼油饲料中分别添加VE100mg/kg,形成6个处理饲料,投喂50±3g1龄鲤鱼鱼种两个月,结果表明:1氧化鱼油消耗鲤鱼肌肉中VE(P<0.05),消耗程度与鱼油氧化程度成正比关系。随着储存(-20℃)时间延长,VE含量明显下降(P<0.05);2新鲜鱼油和POV为118.79meqO2/kg的氧化鱼油对鲤鱼肌肉储存(-20℃)期间氧化稳定性的破坏作用强于POV(meqO2/kg)为189.37和367.86氧化程度较高的鱼油,但新鲜鱼油的破坏作用低于POV为118.79meqO2/kg的低氧化程度鱼油。肌肉氧化稳定性在储存初期较差,15d时增强,之后随时间延长而下降;3氧化鱼油对肌肉挥发性盐基氮(VBN)无显著影响(P>0.05),而储存(-20℃)时间对肌肉VBN有显著影响(P<0.05);4氧化鱼油显著增加肌肉渗出性损失(P<0.05),但随着鱼油氧化程度升高,增加态势相对减弱(P>0.05)。随着解冻时间延长肌肉渗出性损失增加(P<0.05);5饲料中添加VE相应提高肌肉中VE水平(P<0.05)、减弱氧化鱼油对肌肉氧化稳定性的破坏(P<0.05)、减少肌肉VBN生成(P<0.05)和降低氧化鱼油诱发的肌肉渗出性损失(P>0.05)。 相似文献
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微生态制剂生产工艺对其产品质量的影响 总被引:1,自引:0,他引:1
论述了微生态制剂生产新工艺设备与现有传统工艺设备的对比试验,结果证明生产工艺设备对其产品质量影响很大,总结出应用新的育种、发酵、干燥等工艺设备,有投资少、菌种旺盛,菌种生长迅速、机械化和自动化程度高,产品质量稳定,活细胞数高等优点。 相似文献
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To determine the ovarian response to the ram effect after treatment with melatonin, on 8 March, 71 Rasa Aragonesa ewes were randomly assigned to either the treatment group and given an 18mg melatonin implant or the untreated group. On 19 April (day 0), rams were introduced into the flock. Melatonin treatment produced a significantly higher percentage of cyclic ewes at ram introduction (P<0.05). Melatonin-treated ewes had their first oestrus after ram introduction significantly earlier than did untreated ewes (P<0.0001), and the groups differed in the distribution of their ovarian response. Most (80%) of the treated ewes exhibited a silent ovulation followed by a cycle of normal duration, whereas about half (52%) of the untreated ewes exhibited a silent ovulation, a short cycle, and another silent ovulation followed by a cycle of normal duration (P<0.05). At ram introduction, melatonin-treated ewes, cyclic and non-cyclic, had higher mean plasma progesterone concentrations than did untreated ewes. The proportion of ewes that mated within the first 17 days of the mating period was significantly higher among the treated ewes than in the untreated ewes (P<0.0001). Furthermore, at lambing, 39% of the melatonin-treated ewes lambed within the first 17 days of the lambing period, while none of the untreated ewes lambed in that period. The untreated group exhibited peaks in mating between days 18 and 21, and particularly, between days 22 and 25, when the majority of ewes lambed; peaks did not occur in the treatment group. Treated and untreated ewes did not differ significantly in fertility, litter size and fecundity. In conclusion, melatonin treatment modifies the ovarian response to the ram effect in ewes, which leads to modifications in mating patterns, and consequently, the lambing curve. 相似文献
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在现代动物营养中,饲料在支持动物健康和生长方面所起的作用已变得越来越重要。自从近几年来欧盟禁止使用抗生素促生长剂后,这种重要性已变得更加突出。饲料和饲养战略必须设计成不但能支持动物与之相适应的良好生长,而且对动物的防病和保健能起到一定作用(Adams,2002)。 从总营养的角度,要考虑到饲料中各种营养成分与其它生物活性成分——营养因子之间所存在的相互关系(Adams,1999)。抗氧化剂营养因子尤为重要,它们是多样的不同分子,并具有两项非常重要的功能:第一,它们可增强油液和脂 相似文献