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试验在猪日粮中加入25.73%~44.04%的多花黑麦草鲜草(以干物质计的实际采食量)饲喂育肥期的二元杂交肉猪,结果证明多花黑麦草在日粮中由10%增至20%时,日增重由584g/(头·天)增至600g/(头·天);而多花黑麦草在日粮中由30%增至50%时,日增重由512g/(头·天)降至456g/(头·天).第86天时,各试验组间的日增重差异极显著(P<0.0¨.随着多花黑麦草在日粮中的替代量增加,料肉比3.22:1降至2.12:1,各育肥组出栏时,饲料牧草干物质的转化效率为3.15~3.51kg(消耗的DM/1kg活重).试验组5比对照组减少精料消耗30.50%,每头猪节约精料49.16kg,增加收入51.30元.饲喂多花黑麦草对育肥猪的屠宰率、瘦肉率和品质无显著影响. 相似文献
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1下表列出了以牧草代替育肥猪日粮10%的精料的饲养效果,分析表明以优质牧草代替育肥猪日粮中10%的精料不影响生长育肥猪的增重,以美国菊苣为最好,还表牧草代替育肥猪日粮10%的精料的饲养效果日增重(g)总增重(kg)耗精料(kg/头)耗草(kg/头)全期料草比全期料重比日采食精料(60~90 相似文献
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《养殖与饲料.饲料世界》2014,(8):61-61
在每千克育肥猪日粮中,添加0.05g糖精,可使猪日增重提高6.4%,饲料消耗降低5.0%左右;哺乳母猪日粮中添加60mg/kg的糖精,可防止母猪哺乳期发生厌食症及过度掉膘,提高泌乳率;仔猪日粮中添加150~200mg/kg的糖精,日增重可提高8%~10%。 相似文献
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日粮中精料和牧草比例对舍饲山羊增重的影响 总被引:9,自引:0,他引:9
报道了在四川省洪雅县进行的一项山羊舍饲试验。试验分3个阶段、4个分组,每组8只5月龄的波尔×成都麻羊杂交公羔(去势),按不同精料与牧草配比饲喂。在舍饲条件下,无论以哪种牧草为基础日粮,随着补饲精料比例的增加,总的干物质采食量相应增加,而牧草采食量有所下降。以牛鞭草为基础日粮时,如果不补饲精料,山羊日增重很低,补饲精料可明显提高日增重。在牛鞭草日粮的基础上增加苜蓿干草,最初阶段因试验羊不太适应,导致日增重降低,但是经过约2周的适应之后,山羊日增重显著提高,但苜蓿干草成本较高,用于饲养山羊并不划算。以多花黑麦草为基础日粮时,山羊增重效果最好,依补饲精料比例的不同(12%~43%),山羊日增重130~189g,10月龄时的胴体重为17.56~25.23 kg。以黑麦草为基础日粮结合补饲精料虽可以提高山羊日增重,但增加精料导致成本过高,净收入降低。综合比较,在黑麦草基础上添加10%精料(干物质基础)的配比最好,每只羊每日可通过增重获得0.64元净收入。 相似文献
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1下表列出了以牧草代替育肥猪日粮10%的精料的饲养效果。分析表明,以优质牧草代替育肥猪日粮中10%的精料不影响生长育肥猪的增重。以美国菊苣为最好,还可以提高育肥猪的日增重,其次是串叶松香草,而苜蓿相对较差。因为菊苣喂猪时多为叶簇期,叶含量多,茎杆含量较少,蛋白质营养含量丰富,猪的消化利用率高。而苜蓿虽是“牧草之王”,但因其茎秆较多,猪不愿吃,且消化率较低,故育肥猪增重相对较其他牧草组低。2从料重比来看全期投喂精料与牧草比例大致为2.8∶1,每头猪可节(下转第31页)日增重(g)总增重(kg)耗精料(kg/头)耗草(kg/头)全期料草比全期料… 相似文献
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本研究旨在探讨日粮中添加不同水平N-氨甲酰谷氨酸(NCG)对生长育肥猪生长性能及年出栏十万头猪场经济效益的影响。试验选用健康的平均初始体重为(78±10)kg的"杜×长×大"三元杂交阉割公猪168头,随机分为4组,分别饲喂基础日粮+0kg/吨NCG(对照组)、基础日粮+0.5kg/吨NCG(0.05%NCG组)、基础日粮+1kg/吨NCG(0.1%NCG组)和基础日粮+1.5kg/吨NCG(0.15%NCG组),每个处理6个重复,每个重复7头猪。结果表明:1)与对照组相比,添加0.05%NCG组育肥猪净增重提高3.21 kg(P0.05),日增重增加80g(P0.05),料肉比降低0.21(P0.05);0.1%NCG组净增重提高4.28 kg(P0.05),日增重增加107 g(P0.05),料肉比降低0.33(P0.05);0.15%NCG组净增重提高3.12 kg(P0.05),日增重增加78 g(P0.05),料肉比降低0.24(P0.05);2)相比对照组,0.1%和0.15%NCG组的背膘厚和眼肌深度分别在数值上降低和升高,但均差异不显著(P0.05);3)日粮添加0.1%NCG每年能提高十万头猪场532.8万元的经济效益。综上所述,日粮添加NCG能有效提高生长育肥猪的生长性能,NCG添加量为0.1%时具有最高性价比。 相似文献
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日粮添加γ—氨基丁酸对育肥猪生长和饲料利用的影响 总被引:15,自引:0,他引:15
120头杜×长·梅三元杂交猪均分为4组,分别在基础日粮中添加0(对照)、10、20、40mg·kg-1GABA,经30d试验结果表明:10、20mg·kg-1GABA组日增重分别比对照组提高11.39%、9.49%,差异显著(P<0.05);采食量提高7.82%和9.47%(P<0.05);40mg·kg-1GABA组的采食量下降1.23%,日增重降低50g。10mg·kg-1组的血清尿素氮变化与对照组差异不显著(P>0.05),而40mg·kg-1组极显著地高于对照组(P<0.01)。结果显示在育肥猪日粮中GABA添加10mg·kg-1能提高日增重、采食量,且不降低饲料蛋白质的利用率。 相似文献
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本次研究旨在探究微生物发酵饲料对"杜长大"育肥猪生长性能的影响。选择60头体重相近的"杜长大"育肥猪,随机分为4组,每组15头。对照组饲喂基础全价日粮,试验Ⅰ、Ⅱ和Ⅲ组分别饲喂添加10.0%、20.0%和30.0%的微生物发酵饲料,预试期10天,正试期30天。结果显示:与对照组相比,试验Ⅰ、Ⅱ和Ⅲ组猪群日增重分别提高0.09kg/天、0.140 kg/天和0.154 kg/天;日采食量分别提高0.07 kg/天、0.14 kg/天和0.20 kg/天。结果表明在全价日粮中添加微生物发酵饲料有利于提高育肥猪日采食量和日增重。 相似文献
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本试验旨在研究发酵果渣对杜花二元杂交育肥猪的生长性能、养分表观消化率和饲料通过消化道时长的影响。选取480头80日龄左右、体况相近的杜花二元杂交育肥猪(♂杜洛克猪×♀广东小耳花猪),随机分为试验组和对照组,每组24个重复,每个重复10头猪。对照组饲喂基础日粮,试验组饲喂基础日粮的同时,按照猪生长阶段额外添加5%~20%的发酵果渣,饲养试验全期共5个月。结果显示,小猪阶段(25~60 kg阶段,添加5%~10%的发酵果渣),平均日增重无影响,试验组全价料采食量降低6.12%(P>0.05),料重比降低5.57%(P>0.05);中猪阶段(60~80 kg阶段,添加15%的发酵果渣),试验组平均日增重提高6.52%(P>0.05),全价料采食量降低7.55%(P>0.05,料重比降低12.90%(P<0.05);大猪阶段(80~100 kg阶段,添加20%的发酵果渣),试验组平均日增重提高4.69%(P>0.05),全价料采食量降低9.50%(P>0.05),料重比降低12.20%(P<0.05);试验全期,试验组平均日增重提高2.08%(P>0.05),全价料采食量降低7.47%(P>0.05),料重比降低8.62%(P<0.05)。额外添加发酵果渣能不同程度显著性提高杜花二元杂交育肥猪中后期对粗蛋白质的表观消化率,但对钙和磷的吸收具有降低的趋势。额外添加发酵果渣能缩短杜花二元杂交育肥猪前期饲料通过消化道的时长(P>0.05),但能不同程度延长中后期饲料通过消化道的时长(P>0.05)。本试验结果表明,在杜花二元杂交育肥猪日粮中额外添加适量的发酵果渣能提高生长性能,降低料重比,且可一定程度上延长饲料在育肥中后期猪消化道内的停留时间,促进猪对日粮中粗蛋白质等营养物质的消化吸收。 相似文献
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选取40日龄体重接近的断奶新西兰白兔80只,随机分成2组,在基础日粮和营养水平相同的情况下,试验组添加2%的蚯蚓粉。结果表明,试验组平均日增重提高18%,料重比下降11.64%。 相似文献
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放牧对松辽黑猪生长肥育及胴体肉质的影响 总被引:2,自引:0,他引:2
选择松辽黑生长育成猪200头,分成舍饲组和林地放牧组,进行饲养育肥性能测定。舍饲组按常规全期饲喂全价配合精饲料;放牧组则先在舍内育成至体重达40kg后,白天林地放牧,早晚各补饲一次精饲料,直至达到育肥体重。饲养试验结束,各饲养组选取4头(2公2母)体重100kg左右的试验猪,进行屠宰做胴体肉质测定。结果表明:日增重舍饲组为736.5g,放牧组为467.5g,差异极显著(<0.01),而放牧组则每增重1kg比舍饲组少耗精饲料730g,差异显著(<0.05)。屠宰率放牧组为70.71%,比舍饲组的69.21%高,差异显著(<0.05),肌内脂肪含量放牧组为4.92%,舍饲组为3.60%,差异显著(<0.05),其它胴体肉质指标如眼肌面积、背膘厚、瘦肉率及肉色、pH、失水率、嫩度等,两种饲养方式,差异均不明显,但放牧饲养组要比舍饲组有改善和提高的趋势。 相似文献
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Ombabi A Südekum KH Taube F 《Journal of animal physiology and animal nutrition》2001,85(11-12):385-405
Dynamics of changes in digestibility and feed intake by sheep of two ryegrass species during primary growth Environmental impacts can cause short-term variations in chemical composition and feeding value of grass swards during growth and maturation and induce concomitant changes of intake of these grasses by animals. Continuous digestion trials are effective in observing the dynamics of these variations. Therefore this study was conducted to evaluate the effects of maturity-related alterations in the chemical composition of two ryegrass swards during primary growth on nutrient digestibilities and feed intake by sheep. Pure swards of perennial ryegrass (Lolium perenne L., variety Gremie) and Italian ryegrass (Lolium multiflorum Lam., variety Lema) were harvested daily during primary spring growth between 23 April and 19 June 1991 and each grass was offered to a group of five sheep for ad libitum intake. A continuous digestion trial design was employed to measure daily intakes and faecal outputs of organic matter (OM) and OM constituents. Digestibility values were calculated with the assumption that faecal output of day 2 represented the undigested nutrients of the grass eaten at day 0. Based on results of a preliminary study, daily intakes and digestibilities were expressed as rolling 3-day averages. The chemical composition of the grasses varied considerably with growth. Crude protein concentrations declined from 18.3 to 5.9% of dry matter (DM) for perennial ryegrass and from 17.0 to 5.4% of DM for Italian ryegrass, whereas concentrations of some cell-wall fractions markedly increased and partly more than doubled. Fibre content was slightly greater for perennial ryegrass than for Italian ryegrass over the whole growth period. The decline of feeding value with maturity was closely related to increasing concentrations of fibre components and their declining digestibility. Intake by sheep of Italian ryegrass was higher by 3 g/kg of body weight at the beginning and at the end of the primary growth period. Digestibility of the OM was greater than 80% at the start of the experiment and still around 70% after 2 months of grass growth. The decline in DM and metabolizable energy intake was much more pronounced than the decrease of OM digestibility. This could be attributed in part to a decline in feed intake capacity of non-lactating sheep caused by increasing body fat mass. Short-term fluctuations in OM digestibilities were related to alterations of chemical composition of the grasses caused by growth and maturation, in particular variations in water-soluble carbohydrate concentrations. The two ryegrass species differed with regard to nitrogen associated with the cell-wall (NDF) and lignocellulose (ADF). Continuous digestion trials were effective in observing the dynamics of alterations in feeding value and feed intake by sheep as related to growth and maturation of two ryegrass species during primary spring growth. 相似文献
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研究了可溶性干酒糟(DDS)作为饲料原料对生长育肥猪生长性能的影响。选用72头健康体重约70 kg的三元育肥猪,随机分成2个处理组,每个处理组2个重复,每个重复18头猪,对照组饲喂基础日粮,试验组饲喂含40%DDS的试验日粮,试验正式期20 d。结果显示,与对照组相比,试验组育肥猪的平均日增重、平均采食量和料肉比方面无明显差异(P>0.05),从经济效益分析来看,与对照组相比,试验组猪在日采食成本和日增重成本方面分别下降了1.41元/kg和1.50元/kg,整个育肥周期每头猪可多获利约75元。试验证实在生长育肥猪的日粮中添加DDS能够完全满足育肥猪的生长需要,并可降低养殖成本,进一步提高经济效益。 相似文献
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成红 《青海畜牧兽医杂志》2006,36(5):20-20
采用坑贮乳酸菌发酵的洋芋渣喂猪,试验组比对照组每头猪平均日增重提高37g,提高9.43%,试验组比对照组头均每kg增重减少饲料支出9.12%,试验组比对照组头均盈利增加36.73元,试验组比对照组头均提高24.15%,试验组头均总增重比对照组提高6.56kg,经t检验,试验组增重显著(P<0.05)。 相似文献