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1.
This study was conducted to determine the performance and N metabolism in weaned pigs fed diets containing different sources of starch. Pigs were weaned at 28 days of age, and assigned randomly into 4 soybean meal-based diets containing different sources of starch: corn, brown rice, sticky rice, and Hi-Maize 1043 (resistant starch). There were 12 pigs per treatment group in the growth-performance trial. Additionally, a 4 × 4 Latin design was used for a nitrogen (N) balance study, with 5 days for each experimental period (n = 4). Average daily gains were 0.38, 0.34, 0.31, and 0.28 kg/day (P < 0.01), respectively, for pigs fed the corn, brown rice, sticky-rice, and Hi-Maize 1043 diets. Feed:gain ratios were 1.65, 1.78, 1.95, and 1.86 (P < 0.01), for the above 4 diets, respectively. Fecal N and urinary N excretion as well as the apparent fecal digestibility of crude protein in pigs fed the corn, brown rice, and sticky-rice diets were higher (P < 0.01) compared with pigs fed the Hi-Maize 1043 diet. Collectively, our results indicate that dietary sources of starch affected both growth performance and N utilization in weaned pigs.  相似文献   

2.
The aim of the present study was to evaluate the effect of two different sources of starch on plasma glucose, acetate and insulin responses and peripheral lipogenesis in adipose and skeletal muscle tissues. Eighteen male growing pigs were fed a diet containing 250 g native corn starch/kg (CS; 26% amylose, 74% amylopectin) or 250 g raw potato starch/kg (RPS; 20% amylose, 80% amylopectin) as examples of digestible and resistant starch (type II), respectively. After 38 days on the experimental diets, twelve pigs (6 per treatment, Experiment 1) were killed and samples of adipose and muscular tissues were analysed for intramuscular lipid content and lipogenic enzyme activity. Lipogenic enzyme activities were significantly higher for CS than RPS in adipose tissues but not in muscular tissues. No differences were detected on the lipid content of the muscles tested. The six remaining pigs (3 per treatment, Experiment 2) were fitted with catheters in the saphenous vein and femoral artery after 28 days on the experimental diets. After feeding restoration to a level of 1.1 kg/day, they received a primed constant infusion of 1-13C acetate for a period of 90 min, starting 5 h after feeding the meal ingestion, and a primed constant infusion of 6,6-D2 glucose for 7 h, starting 1 h before the following meal ingestion. No differences were observed between diets on peripheral acetate entry rate. Glucose concentration, the rate of peripheral glucose appearance and insulin concentration were quantitatively higher after the meal for CS than for RPS diet. This shows the importance of type of dietary starch on lipogenesis as a result of changes in glycemia and insulinemia in adipose but not in muscular tissues of growing pigs.  相似文献   

3.
Two experiments were conducted to determine the effect of nonwaxy (amylose and amylopectin starch) or waxy (amylopectin starch) sorghum on growth, carcass traits, and glucose and insulin kinetics of pigs. In Exp. 1 (95-d), 60 crossbred barrows or gilts (initial and final BW of 24 and 104 kg) were allotted to three treatments with five replications of four pigs per replicate pen in a randomized complete block design. The dietary treatments for Exp. 1 were 1) corn-soybean meal (C-SBM) diet, 2) sorghum-SBM (red pericarp, non-waxy), and 3) sorghum-SBM (red pericarp, waxy). In Exp. 2, 28 crossbred barrows (initial and final BW of 24 and 64 kg) were allotted to two treatments with three replications of four or five pigs per replicate pen in a randomized complete block design. Growth data were collected for 49 d, and then 20 barrows were fitted with jugular catheters, and then a glucose tolerance test (500 mg glucose/kg BW), an insulin challenge test (0.1 IU of porcine insulin/kg BW), and a feeding challenge were conducted. The dietary treatments for Exp. 2 were 1) sorghum-SBM (white pericarp, nonwaxy) and 2) sorghum-SBM (white pericarp, waxy). In Exp. 1, ADG (P = 0.10) and ADFI (as-fed basis; P = 0.02) were increased (P = 0.10) and gain:feed was decreased (P = 0.04) in pigs fed the sorghum-SBM diets relative to those fed the C-SBM diet. These responses may have resulted from the lower energy content of sorghum relative to corn. Plasma NEFA concentration (collected after a 16-h fast on d 77) was decreased (P = 0.08) in pigs fed the waxy sorghum-SBM diet relative to those fed the nonwaxy sorghum-SBM diet. Kilograms of carcass fat was decreased (P = 0.07) in pigs fed the waxy sorghum-SBM diet relative to those fed the nonwaxy sorghum-SBM diet. In Exp. 2, there was no effect (P = 0.57 to 0.93) of sorghum starch type on growth performance by pigs. During the glucose tolerance and insulin challenge tests, there were no effects (P = 0.16 to 0.98) of diet on glucose or insulin kinetics. During the feeding challenge, glucose (P = 0.02) and plasma urea N (P = 0.06) area under the response curves from 0 to 90 min were decreased in pigs fed the waxy sorghum-SBM diet. Feeding waxy sorghum had minimal effects on growth and carcass traits relative to pigs fed corn or nonwaxy sorghum. Waxy sorghum vs. nonwaxy sorghum had no effect on glucose or insulin kinetics in pigs.  相似文献   

4.
Three experiments were conducted to assess the response of weaned pigs to organic acid SF3, which contains 34% calcium formate, 16% calcium lactate, 7% citric acid and 13% medium chain fatty acids. Dietary treatments had no effect on growth performance of piglets (21‐day weaning) fed the commercial prestart diet for 1 week before receiving the experimental diets supplemented with SF3 at 0, 3 or 5 g/kg diet (Exp. 1), whereas diarrhea frequency averaged across a week was decreased by SF3 supplementation (5 g/kg diet) in piglets fed the experimental diets immediately after weaning (Exp. 2). In Exp. 3, piglets (28‐day weaning) were fed the control (containing pure colistin sulfate and enramycin, respectively, at 20 mg/kg diet) for 1 week and then were fed the control or SF3‐supplemented (5 g/kg diet) diet for 2 weeks. The SF3‐fed piglets had greater apparent ileal digestibility of calcium and dry matter, while also demonstrating greater overall gross energy, up‐regulated jejunal expression of sodium‐glucose cotransporter‐1 and transforming growth factor‐β, down‐regulated jejunal expression of tumor necrosis factor (TNF)‐α, higher ileal Lactobacillus, with lower total bacteria content, lower plasma TNF‐α but higher IgG levels than the control‐fed piglets. Collectively, SF3 consumption improved diarrhea resistance of weaned pigs by improving nutrient digestibility, piglet immunity and intestinal bacteria profile. © 2016 Japanese Society of Animal Science  相似文献   

5.
Four crossbred(Duroc×Landrace×Yorkshire)boars,weighing an average of 22.40 ± 1.08 kg and fitted with permanent catheters in their portal and mesenteric veins as well as their carotid artery,were utilized in a 4 × 4 latin square design experiment in order to investigate the effects of different starch sources(maize,brown rice,sticky rice,and resistant starch)on the absorption of energy sources through the portal vein.Portal blood flow averaged 30.68,28.40,29.99,and 30.12 mL/min per kg BW for pigs fed the maize,brown rice,sticky rice,and resistant starch diets,respectively,and did not differ(P0.05)between treatments.The absorptions of glucose,plasma ammonia,and total amino acids were significantly lower(P0.05)in pigs fed the resistant starch diet than pigs fed the other starch sources.In contrast,significantly(P0.05)higher amounts of propionate and total volatile fatty acids were absorbed from the portal vein of pigs fed resistant starch than pigs fed diets based on maize,brown rice,or sticky rice.In addition,significantly(P0.05)more lactic acid was absorbed from the portal vein by pigs fed the sticky rice diet than pigs fed the other three diets.The energy absorbed from the portal vein in the form of glucose and amino-N as well as the total energy absorbed was significantly(P0.05)lower in pigs fed the resistant starch diet than pigs fed the other three starch sources.In contrast,the amount of energy absorbed in the form of volatile fatty acids was significantly(P0.05)higher in pigs fed resistance starch than pigs fed the other three starch sources.The total energy absorbed through the portal vein as a percentage of the gross energy and digestible energy consumed in pigs fed maize were 50.8% and 54.6%,respectively,which were significantly(P0.05)higher than the values in pigs fed resistant starch(41.5% and 46.6% respectively).The results indicate that energy is absorbed in different forms and with different utilization efficiencies in the digestive tract of pigs as a result of feeding different starch sources.Starch sources supplying most of their energy in the form of glucose had higher energy utilization efficiencies,while starch sources supplying most of their energy in the form of volatile fatty acids or lactic acid had lower energy utilization efficiencies.  相似文献   

6.
The weaning of piglets is often associated with digestive disorders, particularly diarrhea--postweaning colibacillosis (PWC)--which is caused by infection with enterotoxigenic strains of Escherichia coli. It has been shown previously that a diet for newly weaned pigs based on cooked white rice and animal protein decreases the occurrence of PWC, whereas the addition of carboxymethylcellulose (CMC) to this diet enhances PWC. The aims of the current work were to 1) determine whether substitution of animal protein with plant proteins in the cooked-white-rice diet influenced its protective effects on PWC and 2) confirm that an increase in viscosity of the digesta by adding CMC to the diet favors the development of PWC--with (Exp. 1) or without (Exp. 2) experimental infection of piglets with E. coli. The diets were 1) cooked white rice and animal protein sources (RAP), 2) RAP + CMC added at 40 g of CMC/kg (air-dry basis) of diet, 3) cooked white rice and plant protein sources (RPP), and 4) wheat and plant protein sources (WPP). Experiments 1 and 2 were conducted using 32 and 24 piglets (eight and six per treatment), respectively. Piglets were weaned at 21 d (d 1), and fed ad libitum until slaughter on d 9. In Exp. 1, piglets were orally infected with enterotoxigenic E. coli on d 4, 5, 6, and 7. On d 8 of Exp. 1, the E. coli scores in feces of pigs fed RAP + CMC were higher than with RAP (P < 0.01). On d 9 after weaning, feces from pigs fed diet RAP were normal or moist, whereas feces from pigs fed RAP + CMC were wet to diarrheic. On d 7 of Exp. 2, pigs fed diets RAP + CMC and WPP had wetter feces than pigs fed diets RAP or RPP (P < 0.05). On d 8, the E. coli scores in feces were higher (P < 0.01) with pigs fed RAP + CMC than with all other diets. The E. coli scores in the digesta were also higher with pigs fed RAP + CMC, and to a lesser extent with diet WPP, than with pigs fed RAP or RPP (P < 0.01). The large intestine was heavier in pigs fed diets RPP and WPP, and the digesta were more acidic (P < 0.05). This study confirmed that diet RAP was protective against PWC, and that substitution of animal proteins with plant protein in a rice-based diet did not diminish its protective effects. The addition of CMC to cooked white rice increased digesta viscosity and enhanced PWC. Consequently, this diet represents a useful model for studying this condition.  相似文献   

7.
Two experiments were conducted to determine the effect of substituting a more available dietary carbohydrate (CHO) for portions of corn or fat in the diet on growth performance, carcass traits, meat quality, and serum or plasma metabolites in growing-finishing pigs. A three-phase feeding program was used with corn-soybean meal diets formulated to provide 105% of the Lys requirement for barrows or gilts gaining 325 g of lean daily in Exp. 1 or gilts gaining 350 g of lean daily in Exp. 2. Diets were isoenergetic within experiments. All other nutrients met or exceeded suggested requirements. In Exp. 1, pigs were allotted to three dietary treatments (0, 7.5, or 15.0% sucrose), with three replications of barrows and three replications of gilts, and with three or four pigs per replicate pen; average initial and final BW were 25.2 and 106.7 kg. In Exp. 2, gilts were allotted to two dietary treatments (waxy [high amylopectin] or nonwaxy [75% amylopectin and 25% amylose] corn as the grain source), with five replications of four gilts per replicate pen; average initial and final BW were 37.7 and 100.0 kg. In Exp. 1, ADG and gain:feed ratio increased linearly (P < 0.02) as dietary sucrose increased. Minolta color scores, a* and b*, and drip loss (P < 0.06) also increased linearly with added sucrose. In Exp. 2, ADG, carcass weight and length, and the Minolta a* value were greater for pigs fed waxy corn (P < 0.08) than for those fed nonwaxy corn. Feed intake, longissimus muscle area, 10th-rib and average backfat thickness, dressing percentage, fat-free lean, percentage of lean and muscling, lean gain per day, total fat, percentage fat, lean:fat ratio, serum or plasma metabolites (Exp. 1: serum urea N; Exp. 2: serum urea N, and plasma nonesterified fatty acids, triacylglycerols, total and high-density lipoprotein cholesterol, insulin, and total protein), pH of the longissimus muscle, and subjective muscle scores (color, firmness-wetness, and marbling) were not affected by diet in either experiment. In summary, increasing availability of dietary CHO in growing-finishing pig diets improved growth performance, but it did not affect carcass traits.  相似文献   

8.
孙炬仁 《中国饲料》2022,1(4):65-68
文章旨在研究日粮用碎米完全替代玉米对断奶仔猪生长性能、血清生化及蛋白质代谢的影响.试验将180头21?d断奶、平均体重为(6.48±0.04)kg的仔猪随机分为2组,每组5个重复,每个重复18头.两组断奶仔猪分别饲喂以45％玉米和碎米为主的日粮,试验共持续14?d.结果:与玉米组相比,碎米组仔猪断奶后8～14?d平均日...  相似文献   

9.
为研究发酵香菇渣（fermented shiitake residues,FSR）对断奶仔猪生产性能、十二指肠消化酶活性、空肠紧密连接蛋白相关基因表达、结肠挥发性脂肪酸及结肠微生物区系的影响,本研究选用100头健康的壹号土猪断奶仔猪（小耳花猪×杜洛克猪,公母各50头）,随机分为2组,每组5个重复,每个重复10头猪,进行饲养试验。对照组饲喂基础饲粮（NC组）,试验组饲喂基础饲粮+5%发酵香菇渣。试验期33 d。饲养试验结束时,从每个组中选择6头仔猪（公母各半）进行屠宰取样。检测指标包括生长性能、十二指肠黏膜消化酶活性、空肠紧密连接蛋白mRNA相对表达量、结肠挥发性脂肪酸含量和肠道微生物结构。结果显示,与对照组相比,试验组显著提高了断奶仔猪的末重和平均日增重（P<0.05）,显著降低了料重比（P<0.05）;显著提高了十二指肠黏膜胰蛋白酶和β-淀粉酶活性（P<0.05）;显著提高了结肠挥发性脂肪酸丙酸、丁酸、异丁酸和异戊酸水平（P<0.05）;显著增加了结肠纤维杆菌门（Fibrobacteres）和链球菌属（Streptococcus）的相对丰度（P<0.01;P<0.05）,对空肠紧密连接蛋白1（TJP1）和紧密连接蛋白2（TJP2）基因mRNA的表达无显著影响（P>0.05）。综上所述,饲粮中添加5%发酵香菇渣可提高断奶仔猪肠道消化酶活性,增加结肠挥发性脂肪酸含量,调节肠道微生物区系组成,有利于提高断奶仔猪的生长性能。  相似文献   

10.
We evaluated the apparent (AID) and standardized ileal digestibility (SID) of amino acids (AA) in spray‐dried egg (SPE) and albumen powder (AP) compared with spray‐dried porcine plasma (SDPP), dried porcine solubles (DPS) and fish meal (FM). Additionally, the effects of these egg byproducts as a replacement for conventional animal proteins on the performance and nutrient digestibility of piglets were studied. In Exp. 1, six barrows fitted with ileal T‐cannulas were allotted to a 6 × 6 Latin Square design and fed six diets. The AID and SID of AA were generally higher in AP and FM (P < 0.01) than in the other protein sources. In Exp. 2, 150 piglets weaned at 21 days, were fed diets containing the five protein sources for 3 weeks. Weight gain of piglets fed SDPP was the highest among the treatments. Dry matter and protein digestibility for pigs offered SDPP were higher (P < 0.01) than those offered FM and DPS. AP decreased (P < 0.05) Escherichia coli counts in the cecum. DPS decreased (P < 0.05) serum diamine oxidase compared with SPE. In conclusion, AP and SPE are competitive with traditional animal protein sources and can be successfully fed to piglets without compromising performance.  相似文献   

11.
本试验旨在研究不同淀粉类型饲粮对育肥猪盲肠食糜主要微生物及其代谢产物的影响。试验选取72头健康且初始体重相近的“杜×长×大”三元杂交阉公猪,随机分为3组,每组8个重复,每个重复3头猪。3组猪分别饲喂含有木薯淀粉、玉米淀粉和豌豆淀粉作为唯一淀粉来源配制的3种饲粮,饲粮的直链淀粉/支链淀粉分别为0.11、0.25和0.44。试验预试期4 d,正试期42 d。于正式试验的第42天,每个重复选取1头体重接近平均体重的猪进行屠宰,收集盲肠食糜进行相关指标的测定。结果表明:1)与木薯淀粉饲粮相比,豌豆淀粉饲粮显著降低育肥猪盲肠食糜的pH(P<0.05);2)与木薯淀粉饲粮相比,玉米淀粉和豌豆淀粉饲粮显著增加育肥猪盲肠食糜中乳酸的含量(P<0.05),同时豌豆淀粉饲粮显著增加食糜中乙酸、丁酸和总短链脂肪酸的含量(P<0.05);3)对于肠道微生物氮代谢产物而言,与木薯淀粉饲粮相比,玉米淀粉和豌豆淀粉饲粮显著降低育肥猪食糜中氨态氮、腐胺、总生物胺、吲哚和粪臭素的含量(P<0.05),同时豌豆淀粉饲粮显著降低食糜中尸胺和色胺的含量(P<0.05);4)对于微生物而言,与木薯淀粉饲粮相比,玉米淀粉和豌豆淀粉饲粮显著增加育肥猪盲肠食糜中普雷沃氏菌属的数量(P<0.05),而降低食糜中大肠杆菌的数量(P<0.05),同时豌豆淀粉饲粮增加了食糜中乳酸杆菌、双歧杆菌、梭菌Ⅳ和梭菌ⅩⅣ的数量(P<0.05)。由此可见,本试验条件下,给育肥猪饲喂含有高直链的豌豆淀粉改变了其盲肠食糜中微生物的组成和发酵模式,增加了部分有益菌的数量和碳水化合物代谢产物的含量,降低了潜在致病菌的数量和氮代谢产物的含量,这提示摄食含有高直链的淀粉有利于维持宿主肠道健康。  相似文献   

12.
本试验旨在探讨饲粮中添加酵母壁多糖对断奶仔猪外周血免疫和肠道免疫的影响。采用单因素试验设计方法,选取21日龄遗传胎次、体重接近的断奶仔猪180头,随机分为4个组,每组5个重复,每个重复9头猪。4组分别饲喂饲粮中添加0(对照组)、0.15%、0.30%和0.45%酵母壁多糖的试验饲粮。试验期21 d。结果表明:1)与对照组相比,饲粮中添加0.15%、0.30%和0.45%酵母壁多糖显著提高了断奶仔猪血清免疫球蛋白A(IgA)含量(P0.05),饲粮中添加0.30%和0.45%酵母壁多糖显著提高了断奶仔猪血清免疫球蛋白G(IgG)含量(P0.05)。2)与对照组相比,饲粮中添加0.15%、0.30%和0.45%酵母壁多糖显著降低了断奶仔猪血清干扰素-γ(IFN-γ)含量(P0.05),饲粮中添加0.30%酵母壁多糖显著提高了断奶仔猪血清白细胞介素-10(IL-10)的含量(P0.05)。饲粮中添加酵母壁多糖对断奶仔猪血清白细胞介素-2(IL-2)、白细胞介素-6(IL-6)和肿瘤坏死因子-α(TNF-α)含量均无显著影响(P0.05)。3)与对照组相比,饲粮中添加0.30%和0.45%酵母壁多糖显著提高了断奶仔猪回肠CD4~+淋巴细胞含量(P0.05),饲粮中添加酵母壁多糖能一定程度提高断奶仔猪回肠CD8~+和CD20~+淋巴细胞含量,但差异不显著(P0.05)。由此可知,酵母壁多糖能一定程度提高断奶仔猪外周血免疫和肠道免疫,缓解断奶应激。  相似文献   

13.
Two experiments were conducted to evaluate potential interactive effects of supplemental Cr and dietary energy supply in growing pigs. Experiment 1 used 36 individually penned barrows, 25 to 65 kg, in a 2 x 3 factorial arrangement of supplemental Cr (0 or 200 ppb) and energy level (70, 80, or 90% of ME requirement). A corn-soybean meal basal diet was designed to supply all protein, mineral, and vitamin needs and 70% of the estimated ME need at 70% of ad libitum feed intake. Additional energy to 80% or 90% of the ME requirement was provided by a cornstarch/corn oil blend. In Exp. 2, 30 individually penned barrows, 23 to 68 kg, were used in a 2 x 4 factorial arrangement of supplemental Cr (0 or 200 ppb) and added energy source (none, cornstarch, corn oil, or choice white grease) with basal diets identical to Exp. 1. The various energy sources were added to 90% of the ME requirement. In both experiments, growth data were collected over a 50-d period and pigs were killed at 70.1 kg. Increasing energy levels increased (linear, P < 0.01) ADG, average backfat thickness, 10th rib backfat thickness, and cooler shrink and decreased (linear, P < 0.01) longissimus muscle area in Exp. 1. Carcass composition increased (linear, P < 0.01) in lipid and decreased in protein, water, and protein:lipid ratio in response to increasing ME levels. Similar results were observed in Exp. 2 in response to added energy, regardless of the energy source used. In response to ME, linear increases (P < 0.05) in plasma insulin concentration before feeding and after feeding were observed in Exp. 1. In Exp. 2, plasma insulin concentration was lower for the basal diet before feeding (P < 0.05) and higher for the starch diet after feeding (P < 0.01); insulin:glucose ratio increased (P < 0.01) after feeding for starch compared to oil and fat. No consistent effect of Cr or Cr x ME level on performance or carcass was observed (P > 0.10) in these experiments. Similarly, no Cr effect or Cr x ME interaction (P > 0.10) was observed in plasma glucose or insulin levels. Dietary energy levels markedly affected growth criteria in growing pigs (23 to 68 kg) in these experiments, as anticipated, but supplemental Cr was without effect on performance or carcass responses.  相似文献   

14.
Five experiments were conducted to test the effects of various dietary humic substances (HS; HS1, 2, 3, and 4, each with different fulvic and humic acid contents) on pig growth, carcass characteristics, and ammonia emission from manure. In Exp. 1, 120 pigs were allotted to 3 dietary treatments without HS (control) or with HS1 at 0.5 and 1.0% (8 pens/treatment and 5 pigs/pen) and fed diets, based on a 5-phase feeding program, from weaning (d 21.3 +/- 0.3 of age) to 60 kg of BW. In Exp. 2 and 3, 384 pigs (192 for each experiment) were allotted to 3 dietary treatments without HS, with HS1, or with HS2 (0.5%) for Exp. 2 and without HS, or with HS3 or HS4 (0.5%) for Exp. 3 (8 pens/treatment and 8 pigs/pen in each experiment). Pigs were fed diets, based on a 6-phase feeding program, from weaning (25.4 +/-0.2 and 23.6 +/-0.3 d of age for Exp. 2 and 3, respectively) to 110 kg of BW. In Exp. 4, 96 pigs were weaned at 22.1 +/-0.2 d of age and allotted to 2 treatments without or with HS1 at 0.5% (6 pens/treatment and 8 pigs/pen), and in Exp. 5 96 pigs were weaned at 20.9 +/-0.3 d of age and allotted to 3 treatments without HS, or with HS3 or HS4 (0.5%; 4 pens/treatment and 8 pigs/pen). Pigs were fed the diets for at least 2 wk before they were moved to an environmental chamber to measure aerial ammonia and hydrogen sulfide for 48 h at 5-min intervals. In Exp. 1, pigs fed diets with HS1 at 0.5% had greater (P < 0.05) ADG during phase 3 and greater (P < 0.05) G:F during phases 3 and 5 than control pigs. In Exp. 2, pigs fed diets with HS1 or HS2 at 0.5% had greater (P < 0.05) ADG and G:F than control pigs during the entire feeding period, whereas in Exp. 3 HS3 or HS4 did not improve pig growth performance. Ammonia emission from manure was reduced by 18 or 16% when pigs were fed diets with HS1 (P = 0.067) or HS4 (P = 0.054), respectively. The results of this study indicate that the effects of dietary HS are variable but may improve growth performance of pigs and reduce ammonia emission from manure. Further research is needed to clarify these effects and the mechanisms by which HS may cause them.  相似文献   

15.
本试验旨在研究不同直/支链淀粉比饲粮对育肥猪粪便中主要微生物数量和臭气物质排放的动态影响.试验选取健康的"杜×长×大"三元杂交阉公猪72头,按初始体重[(77.00±0.52)kg]相近的原则,随机分为木薯淀粉组、玉米淀粉组和豌豆淀粉组,每组8个重复(栏),每个重复3头猪.3组分别饲喂以木薯淀粉、玉米淀粉和豌豆淀粉作为...  相似文献   

16.
We investigated the effects of rice feeding on growth performance and protein (amino acids) metabolism of weanling piglets. In all, 16 weanling piglets with an average initial weight of 7.5 kg were divided into two groups. One group was fed a corn‐soybean meal‐based diet, and the other was fed a rice‐soybean meal diet, containing around 46% of corn or rice, respectively. A two‐week growth trial was conducted. The average daily gain (p = .025) and feed efficiency (p = .011) in rice‐fed piglets were significantly higher than those in corn‐fed piglets. Liver lysine‐ketoglutarate reductase activity tended to be lower (p = .073) in rice‐fed piglets than in corn‐fed piglets. Plasma urea nitrogen concentration in rice‐fed piglets was significantly lower than that in corn‐fed piglets. Plasma glucose and insulin concentrations were significantly higher in rice‐fed piglets than in corn‐fed piglets. Plasma‐free valine, isoleucine, and tryptophan concentrations were significantly higher in rice‐fed piglets than in corn‐fed piglets. In contrast, plasma histidine concentration was significantly lower in rice‐fed piglets than in corn‐fed piglets. Overall, these results show that rice feeding improves the growth performance and affects the protein (amino acids) metabolism in weanling piglets.  相似文献   

17.
探索阿拉伯木聚糖酶对日粮中非淀粉多糖的作用效果。试验选取16头平均体重(7.74±1.03)kg的28日龄长×大断奶仔猪,分为基础日粮(对照日粮组)和基础日粮+1.0 g/kg阿拉伯木聚糖酶(试验日粮组),分别在试验第12 d、第24 d测定各组内脏器官重量、血液生化指标。试验结果表明,在试验第24 d试验日粮组日增重明显高于对照日粮组,且有显著性差异(P<0.05);在不同的试验时期,试验日粮组对内脏器官绝对重量的影响较大,对相对重量的影响较小,对脾脏的影响无显著性差异(P>0.05);在不同试验时间,两组的血清IgGI、gM、肌酐、血糖、血氨、甘油三酯、总蛋白的含量均无显著性差异(P>0.05),第24 d试验日粮组低密度脂蛋白含量均高于其他各组,且有显著性差异(P<0.05),对照日粮组低密度脂蛋白含量高于第12 d,且有显著性差异(P<0.05),试验日粮组血清尿素氮含量明显低于对照组,且在试验第12 d、第24 d时两组间均有显著性差异(P<0.05)。日粮添加阿拉伯木聚糖酶能提高断奶仔猪日增重,从而影响仔猪生长性能和相关血液生化指标。  相似文献   

18.
本试验旨在研究复方中草药制剂对早期断奶仔猪蛋白质合成能力及抗应激能力的影响。选用平均体重为（7.27±0.18）kg、断奶日龄为（28±2）d的长白猪×约克夏猪仔猪126头,采用单因素完全随机区组试验设计,分为7组,每组3个重复,每个重复6头猪。日粮中中草药复方制剂剂型为水煎剂和散剂2种。试验1组为空白对照组;试验2、3、4组为水煎剂添加组,添加量分别为0.05%、0.10%、0.15%;试验5、6、7组为散剂添加组,添加量分别为0.05%、0.10%、0.15%。试验期21 d。结果表明,与对照组相比,复方中草药制剂可显著提高早期断奶仔猪血清中碱性磷酸酶（AKP）、谷草转氨酶（GOT）、谷丙转氨酶（GPT）的活力及总蛋白（TP）、白蛋白（ALB）的含量（P<0.05）,显著降低血清中尿素氮（BUN）含量（P<0.05）;显著降低早期断奶仔猪血清中肌酸激酶（CK）活力及葡萄糖（GLU）含量（P<0.05）。综上所述,在本试验条件下,复方中草药制剂能显著促进早期断奶仔猪机体蛋白质的合成,降低断奶仔猪的应激,且中草药剂型散剂优于水煎剂,最适添加比例为0.15%。  相似文献   

19.
The effects of weaning age, type of creep diet and the classification of piglets as ‘eaters’ or ‘non eaters’ of creep feed on weight gain to weaning were examined. Four antimicrobial-free diets were offered from day 14 of lactation: (i) wheat-soy based diet with animal and vegetable (‘mixed’) protein sources (COMM), (ii) heat-processed rice (HPR) with barley hulls and potato starch and mixed protein sources (RBPS), (iii) HPR with sugar-beet pulp and mixed protein sources (RSBP), and (iv) HPR with mixed protein sources (R). Pigs were weaned at an average of either 27 (early) or 33 (late) days of age. A dye (indigo carmine) was added to each diet at day 24 of lactation in both groups to classify piglets as ‘eaters’ or ‘non eaters’ of creep feed, based on appearance or non-appearance, respectively, of dye in faeces. Pigs weaned late weighed 1.4 kg more (P < 0.001). Weaning age interacted with diet type and eating classification for weaning weight (P < 0.001). Of the 1067 piglets where classification of the faecal dye was possible, 829 (77.7%) were ‘eaters’ and 238 (22.3%) were ‘non eaters’. This qualitative estimate of creep feed consumption did not influence weight gain to weaning (P > 0.05).  相似文献   

20.
The aim of this study was to determine the effects of dietary supplementation of palygorskite instead of zinc oxide (ZnO) on growth performance, apparent nutrient digestibility and zinc contents in serum and feces in weaned piglets. One hundred and sixty‐five piglets (28 days of age, 7.10 ± 0.86 kg) were allotted to five treatments on the basis of weight and sex. Each treatment included three replicates of 11 piglets. The piglets were fed the same basal diet supplemented with 0 mg/kg (control group), 1800 mg/kg, 2400 mg/kg, or 3000 mg/kg palygorskite or 2500 mg/kg ZnO for 28 days. There was no significant difference for incidence of diarrhea among the four treatments during the 0–14‐day feeding period. Compared with the control group, piglets offered diets supplemented with 1800 mg/kg palygorskite had higher (P < 0.05) average daily gain (ADG) and crude protein digestibility. Fecal digestibility of energy in 1800 mg/kg palygorskite and ZnO groups were higher (P < 0.05) than that in the control group. Both the zinc concentrations in serum and fecal zinc excretion in palygorskite groups and control group were all lower (P < 0.05) than that in the ZnO group. In conclusion, dietary supplementation with 1800 mg/kg palygorskite can improve growth performance and nutrient digestibility and can also decrease zinc excretion in feces in weaned piglets.  相似文献   

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