生物蛋白粉和血浆蛋白粉对仔猪生产性能的对比试验

为了评定生物蛋白粉对仔猪生产性能的影响,共选用96头28日龄的仔猪,体重约7.65kg仔猪(杜×长×大),按照随机化完全区组设计,分到3个处理组。每个处理组设3个重复,每个重复10头仔猪。处理1为对照组,处理2为基础日粮添加4%生物蛋白粉,处理3为基础日粮添加4%血浆蛋白粉。试验期共14d。试验结果表明,仔猪日粮添加生物蛋白粉可达到与血浆蛋白粉相同的生产水平(包括平均日增重、平均日采食量、料肉比、腹泻率)。与添加4%血浆蛋白粉相比,日粮添加4%生物蛋白粉可降低日粮成本而且大大提高仔猪的生产性能。     

日粮中添加酶解血球蛋白粉对断奶仔猪生长性能的影响

血球蛋白经过酶对蛋白质特定位点的切割，生成大量的具有生物活性和营养均衡的小肽。通过在仔猪日粮中添加酶解血球蛋白粉．探究其对仔猪生产性能的影响．结果发现试验组生产性能优于对照组．而且酶解血球蛋白粉可以部分替代血浆蛋白粉．因此日粮中添加血浆蛋白粉对仔猪的生产性能有改善作用。     

酵母提取物替代血浆蛋白粉在断奶仔猪上的生产应用

酵母提取物作为一种富含蛋白质、核酸物质的酵母细胞提取物,是仔猪动物性蛋白质饲料原料的潜在替代品。为进一步证实酵母蛋白替代血浆蛋白粉饲喂断奶仔猪的可行性,近期开展2个试验研究,观察在断奶仔猪日粮中添加酵母提取物并替代血浆蛋白粉对断奶仔猪生长性能的影响。研究结果显示,相对于在基础日粮中添加血浆蛋白粉,添加酵母提取物对断奶仔猪的试验末重、平均日增重、饲料转化率和仔猪平均日采食量均有不同程度的维持和改善作用。因此酵母提取物可以替代动物蛋白质饲料原料如血浆粉而不影响猪的生产性能。     

酵母蛋白粉与血浆蛋白粉在乳仔猪日粮中应用效果的研究

本试验旨在研究乳仔猪日粮中添加喷雾干燥血浆蛋白粉和酵母蛋白粉对其生产性能、断奶后腹泻率以及血清免疫指标的影响。试验选择18窝乳猪随机分为3组,每组6窝。处理1日粮中添加5%血浆蛋白粉,处理2日粮中添加5%酵母蛋白粉,处理3日粮中添加2.5%血浆蛋白粉+2.5%酵母蛋白粉;试验分7~25日龄断奶和25~40日龄2个阶段。结果表明:酵母蛋白粉替代血浆蛋白后,各处理日增重、采食量和饲料增重比方面均无显著性差异(P>0.05);处理2和处理3的仔猪腹泻率比处理1分别降低了37.93%和21.86%;3个处理组血清中免疫球蛋白(IgG、IgM和IgA)水平无显著性差异(P>0.05)。试验结果表明,乳仔猪料中可以使用酵母蛋白粉部分或全部替代血浆蛋白粉。     

禽血浆蛋白粉对断奶仔猪采食量及生长性能的影响

选取100头28日龄杜长大断奶仔猪,随机分成A、B两组,分别饲喂添加5%猪血浆蛋白粉、5%禽血浆蛋白粉的日粮,比较禽血浆蛋白粉GAP701与猪血浆蛋白粉GAP701对断奶仔猪料生长性能的影响。结果表明,断奶仔猪对禽血浆蛋白粉日粮的采食量要略高于猪血浆蛋白粉,在仔猪生长性能方面的影响效果两组相近,初步验证了禽血浆在仔猪教槽料中应用的可行性。     

猪血浆蛋白粉在仔猪日粮中的应用

本试验主要研究猪血浆蛋白粉在仔猪日粮中的应用.通过平均日增重、平均日采食量、料肉比及腹泻率等指标,观察仔猪日粮中添加猪血浆蛋白粉对仔猪生长性能和腹泻率的影响.试验结果表明,添加猪血浆蛋白粉对提高仔猪生长性能、降低仔猪腹泻率具有显著的效果(P＜0.05).     

酵母提取物对断奶仔猪前期生长性能的影响

试验的目的是研究酵母提取物部分替代断奶仔猪饲粮中的血浆蛋白粉对断奶仔猪保育前期生长性能的影响。研究结果显示,在断奶仔猪日粮中添加酵母提取物或以不同水平替代日粮中的血浆蛋白粉,对仔猪的试验末重、平均日增重、饲料转化率和仔猪平均日采食量均有不同程度的改善作用。因此酵母提取物可以替代动物蛋白质饲料原料如血浆粉而不影响猪的生产性能。     

不同类型小肽产品对断奶仔猪生产性能及血液生化指标的影响

试验研究了3种不同类型的小肽产品等蛋白取代喷雾干燥血浆蛋白粉对21d断奶仔猪的生产性能和血液生化指标的影响。选用体重近似的192头(21±1)d断奶的皮杜长大四元杂交仔猪,随机分为4个处理,每个处理6个重复,每个重复栏8头猪。4个处理日粮分别为:添加2%喷雾干燥血浆蛋白粉的对照组和分别添加2%小肽产品A、B和C等蛋白取代血浆蛋白粉的T1、T2和T3试验组。试验期为21d。试验结果表明,添加3种不同肽产品等蛋白取代血浆蛋白粉对断奶仔猪的生产性能和血液生化指标均无显著影响(P>0.05),小肽产品可以部分等蛋白取代断奶仔猪日粮中的血浆蛋白粉。     

血浆蛋白粉对断奶仔猪生产性能的影响

为了探究血浆蛋白粉在等营养水平条件下对断奶仔猪生产性能的影响。选择同批次、生长发育健康的25日龄平均体重6kg断奶去势长×大仔公猪40头,按窝别、体重随机分为8组,4组作为空白组,另外4组作为试验组,每组重复数为5。空白组提供与试验组等营养水平的日粮,试验组为添加4%血浆蛋白粉日粮,测定断奶后0～15日龄和16～30日龄生长性能。结果:添加4%的血浆蛋白粉组生产性能、与等营养水平条件下的空白组比较差异不显著(P 0.05)。结论:在本试验条件下日粮中添加4%的血浆蛋白粉对断奶仔猪生产性能无明显影响。     

鸡血浆蛋白粉对断奶仔猪生长性能和血液生化指标的影响

选取108头25±3日龄断奶仔猪,随机分成3个处理组,即对照组、试验组一和试验组二,每个处理组3个重复,每个重复12头仔猪,对照组饲喂不含血浆蛋白粉的基础日粮,试验组一、试验组二分别饲喂鸡血浆蛋白粉、猪血浆蛋白粉添加量为4%的试验日粮。研究不同血浆蛋白粉对断奶仔猪生长性能、血液生化指标的影响。试验时间14d。试验结果表明,鸡血浆蛋白粉能够提高仔猪生长性能和血清球蛋白含量(P<0.05),与猪血浆蛋白粉的饲喂效果无明显差异(P>0.05)。     

大豆蛋白肽对断奶仔猪生长性能的影响

以断奶仔猪为实验动物,研究大豆蛋白肽对幼龄动物生长的影响功能。160头断奶仔猪随机分为4组,Ⅰ组为基础日粮添加3.0%血浆蛋白粉,Ⅱ组为基础日粮添加3.0%乐能小肽和3.0%血浆蛋白粉,Ⅲ组为基础日粮添加3.0%乐能小肽,Ⅳ组为基础日粮添加5.0%乐能小肽组,试验期12 d。试验结果显示,仔猪断奶后1~6 d、7~12 d或1~12 d,试验Ⅱ组和Ⅲ组均显著提高断奶仔猪生长性能（P〈0.05）,并显著提高断奶仔猪的饲料转化率（P〈0.05）。考虑到饲料成本,建议在断奶仔猪日粮中添加3.0%大豆蛋白肽。     

纳米氧化锌对断奶仔猪生长性能和肠黏膜屏障的影响

本文旨在研究纳米氧化锌对断奶仔猪生长性能和肠黏膜屏障的影响及其机理。选用96头平均体重为(5.7±0.2)kg的21日龄"杜×长×大"断奶仔猪,随机分成3组:1)对照组,饲喂基础饲粮;2)氧化锌组,饲喂在基础饲粮中添加3 000 mg/kg锌(氧化锌)的试验饲粮;3)纳米氧化锌组,饲喂在基础饲粮中添加300 mg/kg锌(纳米氧化锌)的试验饲粮。每组4个重复,每个重复8头仔猪,试验期14 d。结果表明:1)与对照组相比,纳米氧化锌组断奶仔猪平均日增重提高了7.26%(P<0.05),腹泻率降低了70.82%(P<0.05),但与氧化锌组差异不显著(P>0.05)。2)与对照组相比,纳米氧化锌组仔猪28和35日龄绒毛高度分别提高了12.64%和10.80%(P<0.05);28日龄隐窝深度降低了15.42%(P<0.05);28和35日龄绒毛高度/隐窝深度分别提高了33.61%和17.11%(P<0.05);28和35日龄血浆D-乳酸含量分别降低了28.97%和20.23%(P<0.05),二胺氧化酶活性分别降低了28.61%和24.92%(P<0.05)。氧化锌组和纳米氧化锌组之间各指标差异不显著(P>0.05)。结果提示,断奶仔猪饲粮中添加300 mg/kg锌(纳米氧化锌)可提高平均日增重,降低腹泻率,改善肠黏膜形态,降低肠黏膜通透性,其效果与添加3 000 mg/kg锌(氧化锌)相当。     

蛋白酶解物对早期断奶仔猪肠黏膜形态和生长性能的影响

本文旨在研究自制蛋白酶解物对早期断奶仔猪生长性能的影响。选用40头健康杜×长×大三元杂交商品仔猪(约3.5 kg/头),随机分为5个处理组(1个对照组,4个试验组),每个处理组设4个重复,每重复2头。对照组添加1.5%血浆蛋白粉,试验1~4组分别添加2%玉米蛋白粉酶解物(HCPP)、豆粕酶解物(HSM)、鱼粉酶解物(HFM)和酵母酶解物(HY)。仔猪14日龄断奶,预试期2 d,正试期14 d。试验测定了早期断奶仔猪生长性能和肠黏膜形态。结果表明:日粮中添加2%酵母酶解物通过保护小肠黏膜的正常形态结构,能有效地提高早期断奶仔猪平均日增重(24.64%,P<0.05)和日采食量(7.80%),并改善饲料转化率(13.68%)。     

复方中药发酵粉对断奶仔猪生长性能、养分表观消化率、抗氧化功能以及免疫功能的影响

【目的】本试验旨在研究饲粮中添加复方中药发酵粉对断奶仔猪生长性能、养分表观消化率、抗氧化功能以及免疫功能的影响。【方法】试验选取48头体重为(8.290±0.140)kg、健康状况良好的28日龄三元(杜×长×大)杂交去势断奶仔猪,按照体重随机分为2组,每组6个重复,每个重复4头猪。对照组饲喂基础饲粮,试验组饲喂基础饲粮+3%复方中药发酵粉,其中复方中药发酵粉由山楂、陈皮、鸡内金、山药、茯苓等原料发酵而成,其主要活性物质包括有机酸、黄酮类物质、多糖类及三萜类物质等。试验为期28 d,试验结束前3 d采集饲粮样和粪样,试验结束后每个重复选取1头接近平均体重的断奶仔猪进行屠宰,采集血浆和肝脏,测定生长性能、养分表观消化率、血浆和肝脏抗氧化指标、血浆免疫指标等。【结果】与对照组相比,复方中药发酵粉组断奶仔猪平均日采食量(ADFI)和料重比(F/G)均无显著差异(P>0.05),但其平均日增重(ADG)显著提高(P<0.05),腹泻率显著降低(P<0.05);粗脂肪(EE)、粗灰分(Ash)和钙(Ca)的表观消化率均极显著或显著提高(P<0.01;P<0.05);血...     

Growth performance, energy, and nitrogen balance of weanling pigs fed a cereal-based diet supplemented with Chinese rhubarb

Forty Swiss Large White piglets of 4 weeks of age were used to determine the effect of dietary Chinese rhubarb on growth performance, as well as on energy and nitrogen metabolism by means of indirect respiration calorimetry studies. A cereal-based diet, supplemented with four different dosages of Chinese rhubarb (0.0%, 0.25%, 0.5%, 1%), was offered ad libitum to the piglets. Gaseous exchange was measured, and urine, faeces, and blood samples were taken. The addition of 0.25% dietary rhubarb increased feed intake (+32%) and daily weight gain (+67%) compared to the diet containing the greatest amount of rhubarb (1%). The piglets fed diet supplemented with 0.25% rhubarb digested and metabolised more energy and nitrogen relative to the animals of treatment 1%. As a consequence, the same group (0.25%) converted more energy and nitrogen into body protein than piglets receiving diet supplemented with 1% rhubarb. However, compared to the control group, the addition of 0.25% rhubarb to the diet resulted in not significantly alter growth performance, energy, and nitrogen metabolism of the animals.Blood parameters were not affected by the rhubarb supplementation. The dose-responding effect of Chinese rhubarb was reflected by the dry matter content of faecal samples. According to the laxative effect of higher doses of rhubarb, the addition of 1% rhubarb to the diet reduced dry matter content of faeces. This effect was well visible in practice, although not relevant in statistical terms. The addition of 0.5% dietary rhubarb had no relevant effect on growth performance or on energy and nitrogen metabolism of treated animals.     

饲粮添加银耳多糖对断奶仔猪生长性能和腹泻的影响

试验旨在研究银耳多糖对断奶仔猪生长性能和腹泻的影响。试验选取健康、体重接近的断奶仔猪72头,采用单因素完全随机化设计分为3个处理,即对照组(饲喂基础饲粮)、无抗组(在对照组饲粮基础上饲喂完全不含抗生素的饲粮)和TP组(在无抗组饲粮的基础上补充0.2%的银耳多糖)。每个处理3个重复,每个重复8头猪。试验期24 d。结果表明:与对照组相比,仔猪饲喂无抗饲粮日采食量增加0.95%、日增重增加1.75%、料重比下降了0.98%、腹泻率增加12.54%,但是对断奶仔猪的日采食量、日增重、料重比和腹泻率均无显著影响,表明不添加抗生素未对断奶仔猪生长性能造成负面影响;与无抗组相比,饲粮添加0.2%银耳多糖,仔猪日采食量提高9.76%、日增重提高12.98%、料重比下降2.46%、腹泻率下降17.80%,表明饲粮添加0.2%银耳多糖能够显著提高断奶仔猪的生长性能;与对照组相比,饲粮添加0.2%银耳多糖,仔猪日采食量提高10.80%、日增重提高14.95%、料重比下降3.41%、腹泻率下降7.49%,表明添加0.2%银耳多糖能够显著提高仔猪的生长性能。研究表明,饲粮中不添加抗生素会增加仔猪腹泻率,但未对其他生长性能造成负面影响;添加0.2%银耳多糖能够降低腹泻率、显著提高仔猪生长性能,并且能够替代抗生素发挥作用。     

复合植物提取物对断奶仔猪生长性能和血清指标的影响

试验旨在研究日粮中添加假蒟和番石榴叶复合提取物对断奶仔猪生长性能和血清指标的影响.选择200头21日龄断奶仔猪,随机分为2组,每组5个重复,每个重复20头猪.对照组仔猪饲喂基础日粮,试验组在基础日粮中添加200mg/kg的复合植物提取物.试验期21 d.结果 显示,各组仔猪生长性能无显著差异(P＞0.05).与对照组相...     

香甜鲜复合诱食剂对断奶仔猪生长性能、血清生化指标、养分表观消化率和粪便微生物菌群的影响

本试验旨在研究饲粮中添加不同水平香甜鲜复合诱食剂对断奶仔猪生长性能、血清生化指标、养分表观消化率和粪便微生物菌群的影响。选取(43±4)日龄体重相近的健康大白仔猪72头,随机分为3个组,每组3个重复,每个重复8头猪。对照组饲喂基础饲粮,试验组分别在基础饲粮中添加1和2 kg/t的香甜鲜复合诱食剂。试验期28 d。结果表明:与对照组相比,饲粮中添加2 kg/t香甜鲜复合诱食剂能够显著提高断奶仔猪平均日采食量和平均日增重(P0.05);饲粮中添加香甜鲜复合诱食剂对养分表观消化率、血清生化指标和粪便微生物菌群的影响不显著(P0.05)。由此可见,饲粮中添加2 kg/t香甜鲜复合诱食剂能提高断奶仔猪平均日采食量和平均日增重,提高生长性能。本试验条件下推荐断奶仔猪饲粮中添加2 kg/t香甜鲜复合诱食剂为宜。     

Effects of casein glycomacropeptide supplementation on growth performance,intestinal morphology,intestinal barrier permeability and inflammatory responses in Escherichia coli K88 challenged piglets

Casein glycomacropeptide(CGMP) is a bioactive peptide derived from milk with multiple functions. This study was aimed at evaluating the effects of CGMP as a potential feed additive on growth performance,intestinal morphology, intestinal barrier permeability and inflammatory responses of Escherichia coli K88(E. coli K88) challenged piglets. Eighteen weaning piglets were randomly assigned to three groups.Control group and K88 challenged group received a basal diet, and CGMP treated group received the basal diet supplemented with 1% of CGMP powder. The trail lasted for 12 days, K88 was orally administered to the piglets of K88 challenged group and CGMP treated group on days 8-10. The results showed that the diet containing 1% CGMP significantly alleviated the decrease in average daily gain(P 0.05),increase in pathogenic bacteria amounts in intestinal contents(P 0.05), intestinal morphology(P 0.05) and barrier permeability damage(P 0.05), and acute inflammatory response(P 0.05)induced by E. coli K88 infection. In conclusion, CGMP supplementation in the diet protected the weaning piglets against E. coli K88 infection.     

Effect of dietary L-carnitine supplementation on growth performance of piglets from control sows or sows treated with L-carnitine during pregnancy and lactation

Previous studies showed that supplementation of sows' diets with L-carnitine increases body weights of their piglets at birth. This study was performed to investigate whether piglets of sows treated with L-carnitine differ in their growth potential from that of piglets of untreated control sows after weaning. It was also investigated whether supplementation of piglets' diets with L-carnitine improves their growth after weaning. In two trials, piglets of the first litters of primiparous sows (trial 1) and the second litters of the same sows (trial 2) were divided into four groups: group 1, piglets of control sows, fed a control diet; group 2, piglets of control sows fed a diet supplemented with 30 mg L-carnitine/kg; group 3, piglets of L-carnitine-treated sows, fed a control diet; group 4, piglets of L-carnitine-treated sows fed a diet supplemented with 30 mg L-carnitine/kg. Mean initial body weights of the piglets of the four groups were identical. They were 8.5 kg in trial 1 and 12.5 kg in trial 2. Diets were fed ad libitum over a period of 35 days. Piglets from sows treated with L-carnitine did not differ in body weight gains, feed intake and gain : feed ratio from those of control sows. In trial 1, piglets supplemented with L-carnitine had higher body weight gains (p < 0.005) and showed a tendency towards a higher gain : feed ratio (p = 0.09) than piglets fed the control diets. In trial 2, no significant difference in these parameters emerged between piglets fed the diet supplemented with L-carnitine and those fed the control diet. In conclusion, this study shows that dietary L-carnitine treatment of sows does not improve the growth potential of their piglets after weaning under the conditions of equal initial body weights. The study also shows that L-carnitine supplementation of their diets improves the growth performance in light piglets of primiparous sows.