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1.
This study was conducted to determine the effects of dietary supplementation with a Chinese herbal ultra-fine powder on growth performance, serum metabolites and intestinal health in early-weaned piglets. Sixty piglets weaned at 21 days of age were randomly assigned to one of the 3 treatment groups, representing supplementation with 0 or 2 g/kg of the powder, or 0.2 g/kg of colistin to maize- and soybean meal-based diets (n = 20 per group). Dietary supplementation with the powder increased ADFI and ADG, improved the gain/feed ratio, and reduced the incidence of diarrhea in the weaned piglets (P < 0.05), compared with the non-additive group. In contrast to colistin, the Chinese herbs decreased (P < 0.05) serum levels of triglycerides and glucose and increased (P < 0.05) serum concentrations of ferrum and phosphorus. Collectively, these findings indicate that the Chinese herbal powder is safe and effective in preventing the weaning-associated intestinal dysfunction and improving the growth performance in piglets.  相似文献   

2.
Twenty four Duroc × Landrace male piglets, aged 21 days, were assigned to 1 of 4 experimental diets. Diets 1 and 2 contained 150 g kg− 1 wheat bran and diets 3 and 4 contained 90 g kg− 1 maize cobs as the major fibre source. All diets contained 480 g kg− 1 wheat and 200 g kg− 1 soybean meal. Diets 2 and 4 were supplemented with the following enzyme complex: 800 U/kg cellulase, 1800 U/kg glucanase and 2600 U/kg xylanase.

The replacement of wheat bran by maize cobs increased the acetic (P < 0.05) and decreased the butyric acid production (P < 0.05) in the cecum. Piglets fed diets with maize cobs had lower (P < 0.05) levels of butyric acid in the colon than those fed wheat bran.

The xylanolytic, pectinolytic and cellulolytic enzyme activities were higher (P < 0.05) in the cecum and colon of piglets fed the wheat bran based diets. The supplementation of the diet with the enzyme complex did not significantly affect the levels of short chain fatty acids formed in the small intestine and there was a non significant increase of the levels of acetic, propionic and butyric acids in the cecum and colon of piglets (P < 0.10). No interactions were present between fibre sources and enzyme addition.

The results suggest that the enzyme supplementation of the diet did not bring significant benefits to the animals and that when maize cobs replaces wheat bran in diets it negatively affects butyric acid production and fibre-degrading enzyme activity in the hindgut of piglets.  相似文献   


3.
In the weaning period, transition from sow's milk to the post-weaning diet causes the withdrawal of important nutrients as milk nucleotides, which are known to be determinant for the development of the gastrointestinal tract and immune function. The objective of these investigations was to study the effect of including these nucleotides in solid diets for piglets. Nucleotide composition of sow's milk was analyzed using 5 sows at 21 days of lactation. The average free nucleotide concentration was 102.8 ± 9.16 μmol/100 mL. Two experiments were performed to assess the effect of a product based on this composition (Nucleoforce Piglets®) on digestive adaptation and incidence of diarrhoea of nursery piglets. In Exp. 1, three groups of 6 piglets were weaned at 21 days of age and fed with a diet supplemented with 0 (control), 1000 or 2000 ppm of nucleotides, and a fourth group of 6 piglets was maintained in lactation. Seven days after weaning, piglets were euthanized and samples of jejunal mucosa were processed for histological measurements. Villus height decreased from 448 μm in un-weaned pigs to 275 μm in the control group 7 days after weaning. Although there were no differences in feed intake among groups, the reduction in villous height was less pronounced (P < 0.001) in nucleotide supplemented groups showing a villous height of 351 and 378 μm with the doses of 1000 or 2000 ppm respectively. In Exp. 2, 384 early weaned pigs were fed during 14 days with a diet supplemented with 0 (control), 750 and 1000 ppm of nucleotides. ADG and ADFI were not modified by the treatment, but nucleotide supplementation reduced the number of pigs treated with antibiotic as a result of diarrhoea (15.63% vs 3.13% and 1.56%; for control, 750 and 1000 ppm; P < 0.001). These results suggest that dietary supplementation with nucleotides from yeast might help to prevent post-weaning diarrhoea in piglets.  相似文献   

4.
The influence of a dietary supplementation with Saccharomyces cerevisiae (SC) during the first and the second phase of lactation on dry matter (DM) intake, organic matter digestibility, milk yield and quality and haematological profile was evaluated in buffalo cows. Lactating buffaloes (n = 190), 118.7 days in milk (DIM), were randomly divided into Group C (control, n = 95) and Group T (fed diet supplemented with 98 billion CFU of S. cerevisiae, n = 95). Eight buffaloes for each group (Groups T1 and C1), 85.4 DIM, were used to study the in vivo digestibility and the haematological profile. No differences were found for DM intake (16.5 kg·day− 1) and haematological profile. The SC supplementation increased milk yield (7.9 ± 0.2 vs. 7.4 ± 0.2; P < 0.01) but did not affect milk fat and protein. SC supplementation increased OM digestibility, mainly, in the first phase of lactation (< 135 days), thus allowing a higher energy availability for milk yield and reduced fat mobilization.  相似文献   

5.
The aim of the study was to measure the effect of creep feeding during lactation on net absorption in the small intestine at 4 days after weaning. Intermittent suckling was used to increase creep feed intake during lactation. Creep feed containing chromic oxide was provided. Based on the colour of the faeces, piglets were classified as ‘eaters’ or ‘non-eaters’, respectively. At day 4 after weaning, an in vivo small intestine segment perfusion test was performed at 5 sites along the small intestine in 24 piglets (12 eaters and 12 non-eaters). At both sides of each intestinal segment a tube was fitted to perfuse and drain fluid in order to assess net absorption. Net absorption was higher in eaters than in non-eaters (P < 0.001). Net absorption varied greatly between and within piglets and was highest in the caudal segments of the small intestine (P < 0.001). These data suggest that creep feeding could be a useful tool in the prevention of post-weaning diarrhoea.  相似文献   

6.
A 2 × 2 factorial arrangement was used to investigate the interaction between lactose level (170 vs. 275 g/kg) and enzyme supplementation (with or without Endo-1,3 (4)-β-glucanase) in barley based diets (250 g/kg) on piglet performance post weaning. Ninety six weaned piglets (24 days old, 6.5 kg live weight) were blocked on the basis of live weight and were assigned to one of 4 dietary treatments (n = 6) for 21 days. There was an interaction (P < 0.05) between lactose level and β-glucanase supplementation on average daily gain (ADG), food conversion ratio (FCR) and apparent digestibilities of dry matter (DMD), organic matter (OMD) and nitrogen (N). Pigs offered 170 g/kg lactose and β-glucanase supplementation had an improved FCR and ADG compared to the 170 g/kg lactose and unsupplemented barley. However, β-glucanase supplementation at 275 g/kg lactose had no effect on FCR and ADG compared to the 275 g/kg lactose and untreated barley. Pigs offered the diet containing the low level of lactose and β-glucanase supplementation increased (P < 0.05) DMD, OMD and N digestibility compared to the β-glucanase supplemented high lactose diet. However, there was no effect of lactose level in the unsupplemented diets. In conclusion, the inclusion of β-glucanase at the 170 g/kg lactose level improved ADG, FCR and diet digestibility. β-glucanase had a negative effect on FCR and ADG at the 275 g/kg lactose level.  相似文献   

7.
A 2 × 2 factorial experiment was used to investigate the interaction between dietary crude protein (CP) concentration (200 vs 140 g/kg) and inulin supplementation (0 vs 12.5 g/kg) on nitrogen (N) excretion and intestinal microflora from 16 boars (n = 4, 74.0 kg live weight). The diets were formulated to contain similar concentrations of digestible energy and lysine. Pigs offered the high CP diets had a higher excretion of urinary N (P < 0.01), faecal N (P < 0.01) and total N (P < 0.001) than the pigs offered the low CP diets. Inulin supplementation increased faecal N excretion (P < 0.05) and decreased urine: faeces N ratio (P < 0.05) compared to the inulin free diets. There was no significant effect (P > 0.05) of dietary treatment on N retention. There was an interaction (P < 0.05) between dietary CP concentration and inulin supplementation on caecal E.coli. Pigs offered the diet containing 200 g/kg CP plus inulin decreased the population of E.coli compared to the inulin supplemented 140 g/kg protein diet. However, CP concentration had no significant effect on the population of E.coli in the unsupplemented diets. Inulin supplementation increased caecal bifidobacteria (P < 0.01) compared to the inulin free diets. In conclusion, inulin supplementation favourably altered N excretion and lowered the population of E.coli at high CP concentrations.  相似文献   

8.
Two maize based diets containing 2.3 g phytic P and 38 mg Zn/kg (P+) or 1.3 g phytic P and 25 mg Zn/kg (P−) were formulated. A third diet (P+/Phytase) was P+ supplemented with 3-phytase (500 FTU/kg). Each of these three basal diets, supplemented or not with 15 mg Zn/kg, was given during 20 days to weaned piglets and to 1-day-old chicks. Chicks fed the P− diets were removed from the data set because of an abnormally low feed intake.

In piglets, added Zn increased bone (P < 0.05) and plasma Zn (P < 0.01) irrespective of the basal diet (basal diet × Zn, P > 0.05). Supplementing P+ with phytase was more efficient in improving these indicators of Zn status than replacing P+ by P−. In chicks, supplemental Zn improved Zn status in a higher extent when added to P+ than to P+/Phytase (basal diet × Zn, P < 0.05). Phytase increased Zn status in a lesser extent than 15 ppm supplemental Zn. More Zn was soluble in gizzard than in stomach which corresponded to the differences in pH (4.2 vs 5.0). Phytase increased soluble Zn in stomach (P < 0.05) but not in gizzard. These results suggest a higher availability of Zn in chicks than in piglets in the absence of phytase. This may explain the higher efficacy of phytase for improved Zn availability in piglets than in chicks.  相似文献   


9.
A digestibility trial on piglets was conducted to study the effect of an enzyme complex derived from Trichoderma longibrachiatum (Roxazyme G2) supplemented to a rye-based diet on apparent ileal digestibility of amino acids and NSP-constituting sugars. Enzyme supplementation at 200 mg kg− 1 increased (P < 0.05) the digestibility of total amino acids from 67.1 to 70.8. As the dietary concentration of Roxazyme G2 increased from 0 to 100 mg/kg, the ileal digestibility of the NSP constituents gradually increased. No further increase was observed with the supplementation level of 200 mg/kg. The improvement in the digestibility of arabinose + xylose (685%, P < 0.05) was much higher than that of the remaining sugars (110%, P < 0.05). The apparent ileal digestibility of galactose was positively influenced by Roxazyme G2 but it remained negative in all dietary treatments, presumably due to the high concentration of galactose in endogenous secretions. It is concluded that Roxazyme G2 effectively degrades non-starch polysaccharides in upper digestive tract and marginally improves amino acid availability in young pigs.  相似文献   

10.
Four groups of six 21 days-old piglets were used to evaluate the effect of a prebiotic or probiotic on the intestinal fermentative activity. In each group, piglets received one of the following diets: basal diet (C); basal diet supplemented with xylo-oligosaccharide (C-XOS); basal diet supplemented with Saccharomyces cerevisiae (C-SC); and basal diet supplemented with xylo-oligosaccharide and S. cerevisiae (C-XOS + SC).

The short chain fatty acids in the colon of piglets were decreased with the inclusion of S. cerevisiae in the diet (P < 0.01). The xylanolytic activity was higher (P < 0.05) in the small intestine of piglets fed C-XOS + SC diet, but no significant differences were found in the caecum and colon. In the caecum contents, the cellulolytic activity was increased (P < 0.05) by the C-XOS and C-SC diets, but remained similar when the diet was supplemented with the two additives combined.  相似文献   


11.
In a feeding trial, sows and piglets were fed with the probiotic bacterium Bacillus cereus var. toyoi as a feed additive, and the effects on immune cell populations were examined. The development of the gut immune system was determined for piglets at the ages of 14, 28, 35 and 56 days post partum. Tissue samples of the Jejunum and the continuous Peyer's patch were used for enumeration of intraepithelial lymphocyte populations by fluorescence activated flow cytometry and fluorescence microscopy. Both independent methods of investigation led to similar results: the population of intraepithelial CD8+ T cells was significantly enhanced in the probiotic group piglets (p ≤ 0.05), and the numbers of γδ T cells tended to be higher in the intestinal epithelium (p < 0.1) at the time of weaning (day 28). Lamina propria lymphocytes were also influenced by the treatment. Application of B. cereus var. toyoi resulted in significantly more CD25+ lymphocytes and γδ T cells in the probiotic group post-weaning. The occurrence of pathogenic Escherichia coli serogroups was also less frequent in the feces of piglets from the probiotic group. The finding that the CD8+ T cell population in the intestinal mucosa showed changes on day 28 indicated that the influence of B. cereus var. toyoi supplementation on the intestinal immune system started before weaning, an observation supported by changes in the intestinal microflora observed during the suckling-period. The results suggest that feeding of B. cereus var. toyoi to sows may result in beneficial effects on piglet health status independent of their feed supplementation.  相似文献   

12.
The aim of this study was to evaluate the influence of bovine colostrum supplementation on the immune Th1/Th2 response in weaned piglets. After weaning at 21 d, 3 groups of 7 piglets were fed ad libitum with a starter diet and received daily 0, 1 or 5 g of spray-dried bovine colostrum. Spleen and gut-associated lymphoid tissues (GALT): ileal Peyer's patch (iPP), jejunum wall (JW) and mesenteric lymph node (MLN)) biopsies were collected on each piglet after 3 wk of treatment and analysed for their cytokine mRNA expression (IL-2, IL-4, IL-10, IL-12 and IFNγ) by RT-PCR. The supplementation with bovine colostrum induced an increase (P < 0.05) in IL-12 in the JW, in IL-2, IL-10 and IL-12 in the MLN and in IL-4, IL-10 and IL-12 in the iPP. In the latter, bovine colostrum also decreased IFN-γ production (P < 0.01). Finally, no effect of the treatments was recorded in the spleen. These results suggest an immunomodulatory effect of bovine colostrum on the GALT, which responded by producing at different levels both Th1 pro-inflammatory cytokines (IL-2, IFN-γ and IL-12) and Th2 anti-inflammatory cytokines (IL-4 and IL-10). This Th1/Th2 bipolar response protects the weaned piglets from both allergic (food) and infectious (pathogens) diseases.  相似文献   

13.
This study investigated the effects of weaning age, diet, and classification of piglets as ‘eaters’ or ‘non eaters’ of creep feed in lactation, on production and diarrhoea after weaning. Four antimicrobial-free diets were offered in lactation and for 14 days after weaning: (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 (RBHPS), (iii) HPR with sugar-beet pulp and mixed protein sources (RSBP), and (iv) HPR with mixed protein sources (R). Piglets were individually examined for diarrhoea daily for 14 days after weaning, and antibiotic treatments were individually recorded. Faecal swabs were taken on day 10 after weaning and scored for β-haemolytic Escherichia coli. There were significant main effects of weaning age and diet (both P < 0.001) on daily gain between weaning and 14 days after weaning. Pigs weaned later grew 50 g/day more than pigs weaned earlier, and pigs fed the COMM diet grew slower than pigs fed the rice-based diets. The number of antibiotic treatments was influenced by diet (P < 0.001), with most treatments (2.1) given to pigs fed the diet RBHPS. Faecal score was influenced by a weaning age and diet interaction (P < 0.01). There was no correlation (P > 0.05) between the number of antibiotics treatments and the E. coli score.  相似文献   

14.
【目的】研究饲粮中添加地衣芽孢杆菌和解淀粉芽孢杆菌对断奶仔猪生长性能、血常规、血清生化及抗炎抗氧化指标的影响。【方法】选取108头28日龄杜长大断奶仔猪,按体重分为3组,每组6个重复,每个重复6头。对照组饲喂基础饲粮,其余两组分别在基础饲粮中添加1 g/kg地衣芽孢杆菌、1 g/kg解淀粉芽孢杆菌,试验期28 d。在试验第14和28天,空腹称重并计算采食量,每个重复选取2头仔猪,前腔静脉采血并用血细胞分析仪和试剂盒方法测定血常规及血清生化指标。【结果】各组断奶仔猪之间的平均日增重、平均日采食量、料重比均无显著性差异（P＞0.05）。与对照组相比,解淀粉芽孢杆菌组断奶仔猪的腹泻率显著降低（P＜0.05）;地衣芽孢杆菌组和解淀粉芽孢杆菌组断奶仔猪第14天血液淋巴细胞百分含量均显著升高,白细胞介素-2（IL-2）、丙二醛含量及乳酸脱氢酶、谷草转氨酶活性均显著降低（P＜0.05）;解淀粉芽孢杆菌组断奶仔猪第14天血液中碱性磷酸酶活性显著降低,血红蛋白含量显著升高,第28天血液中IL-2含量显著降低,总蛋白、球蛋白含量均显著升高（P＜0.05）。【结论】饲粮中添加地衣芽孢杆菌或解淀粉芽孢杆菌对断奶仔猪生长性能无显著影响,但能够改善仔猪血液指标,保护肝脏功能,且添加解淀粉芽孢杆菌还可以提高仔猪新陈代谢,降低仔猪腹泻率。  相似文献   

15.
The objective of this experiment was to determine whether decreasing dietary protein content and increasing weaning age could improve piglet health and decrease the occurrence and severity of post-weaning colibacillosis (PWC) in the absence of in-feed antimicrobial growth promoters (AGPs). The experiment consisted of a 2 × 2 × 2 factorial combination of weaning age (4 vs 6 weeks), dietary protein content (H vs L; 230 vs 130 g CP/kg) and experimental enterotoxigenic Escherichia coli (ETEC) challenge (+ vs −). On day 3 post-weaning half of the piglets were challenged per os with 109 cfu ETEC. A sample of piglets was euthanased on days 0 and 6 to assess digesta pH and lactobacilli to coliform (L:C) ratio. ETEC excretion persisted longer in the 4-week-weaned piglets than those weaned at 6 weeks (P = 0.003), and the numbers of ETEC shed tended to be higher on the H than L diet, especially in the 4-week-weaned piglets (P = 0.093). Decreasing protein level led to significantly firmer faeces, decreased pH and increased L:C ratio of proximal colon digesta. These results suggest that in the absence of AGPs, increasing weaning age and decreasing dietary protein level, especially in earlier weaned piglets, may help to minimize the effects of PWC.  相似文献   

16.
The study was conducted to investigate the effect of VA and ZnMet on growth performance and part of antioxidant indices of weaning piglets.A total of 81 28-day-old three way cross(Duroc×Landrace×Yorkshine) healthy weaning piglets with an initial average body weight of (7.94±0.62) kg were randomly assigned into 9 groups with 3 replicates per group and 3 piglets per replicate.Factorial design of two factors and three levels was used in this study,the three levels of VA were 0,3 000 and 6 000 IU/kg,and the three levels of ZnMet were 0,300 and 400 mg/kg.The pre-trial lasted for 7 d and the trial lasted for 21 d.Piglets were weighed with an empty belly one by one on the 0,7 and 14 d of the test.Daily intake was recorded everyday.At the same time,the ADG and F/G were calculated.Three piglets without eating were randomly selected in each group for collecting serum samples at the age of 35 and 56 days.The results showed that:① compared with control group,supplementation of VA or ZnMet increased ADG significantly (P < 0.05),while had no influence on F/G (P > 0.05).In addition,ADG was significantly affected by the combination of VA and ZnMet (P < 0.05).VA and ZnMet had interaction effect on ADG,while F/G was not influenced by the combination of VA and ZnMet (P > 0.05).②At 35 days,compared with control group,both the activity of serum CuZn-SOD and GSH-Px increased significantly in experimental groups except the activity of serum GSH-Px in the group added with 300 mg/kg ZnMet;At 56 days,compared with control group,supplementation of ZnMet or VA could significantly improve serum CuZn-SOD activity of piglets (P < 0.05).Supplementation of both VA and ZnMet could significantly increase serum GSH-Px activity (P < 0.05),while supplementation of VA alone or ZnMet alone had no effect on GSH-Px activity (P > 0.05).The results indicated that supplementation of VA or ZnMet alone or the combination of them could promote the growth performance and antioxidant function of weaning piglets.  相似文献   

17.
The aim of this work was to test the hypothesis that a moderate zinc deficiency induces intestinal alterations in weaned piglets. A diet based on maize and soybean meal was formulated without supplemental zinc (33 ppm, zinc-deficient) or with added zinc (113 ppm, control). These diets were pair-fed for 18 or 27 d to intra-litter pairs of piglets weaned at 21 d of age. The feed intake and growth, plasma concentrations of zinc and alkaline phosphatase (ALP) activity, and morphometry, enzyme activities and the microflora of the mid-jejunum were investigated. Feed intake and growth were similar between diets and diarrhoea was not observed. By contrast, plasma zinc and ALP activity were much lower in zinc-deficient piglets at slaughter (P < 0.001). The weight of organs was unaffected, except colonic tissue that was lighter in piglets fed the zinc-deficient diet (P < 0.05). Neither villus-crypt intestinal architecture nor mucosal enzyme activities were altered. Jejunal counts of lactic acid bacteria and coliforms tended to be higher in the zinc-deficient pigs (P ≤ 0.10). In conclusion, feeding a diet moderately deficient in zinc for 18–27 d induced limited intestinal alterations in weaned pigs.  相似文献   

18.
Suckling pigs were separated from their dam for 24 h on day 21 (1 × 24 h fasting, n = 10) or day 21 and 24 (2 × 24 h fasting, n = 10). Pigs in the control group (n = 10) were not fasted before weaning. All pigs were weaned on day 28 postpartum. Feed intake during the first 4 days post-weaning was higher (P < 0.05) for pigs exposed to 1 × 24 h fasting compared with controls. Water consumption was not affected by fasting prior to weaning. The difference in post-weaning feed uptake was not reflected in any clinical traits, intestinal morphology, or activity of digestive enzymes (maltase, dipeptidylpeptidase IV, aminopeptidases A and N; P > 0.15). In conclusion, a short period of fasting prior to weaning can increase post-weaning feed uptake, although this had no clinical impact under the present experimental conditions.  相似文献   

19.
试验旨在研究添加不同水平维生素A (VA)与蛋氨酸锌(ZnMet)对断奶仔猪生长性能、部分血清抗氧化指标的影响。采用2因素3水平析因设计,选择81头28日龄断奶、体重为(7.94±0.62) kg的健康杜×长×大三元仔猪,按体重和性别随机分为9个处理组,每个处理3个重复,分别饲喂含不同剂量VA (0、3 000及6 000 IU/kg)和ZnMet (0、300及400 mg/kg)的日粮。试验预饲期7 d,试验期21 d。试验第0、7和14天逐头空腹称重,记录每日采食量并计算仔猪平均日增重(ADG)和料重比(F/G)。试验开始(35日龄)与结束(56日龄)时,每组随机抽取3头猪,早晨空腹采血,制备血清,测定血清抗氧化指标。结果显示:①与对照组相比,单独添加VA或ZnMet均能提高仔猪ADG (P < 0.05),但对F/G无显著影响 (P > 0.05);VA和ZnMet对仔猪ADG有互作效应,联合添加可以显著提高仔猪ADG (P < 0.05),但二者对F/G无互作效应。②与对照组相比,35日龄时,除单独添加300 mg/kg ZnMet组的GSH-Px活性无显著变化外,其他试验组的CuZn-SOD及GSH-Px活性水平均显著提高(P < 0.05);56日龄时,与对照组相比,单独添加ZnMet或VA均能显著提高仔猪血清CuZn-SOD活性水平(P < 0.05);同时添加VA与ZnMet能显著提高仔猪血清GSH-Px活性(P < 0.05),而单独添加VA或ZnMet虽能提高仔猪血清GSH-Px活性,但效果不显著(P > 0.05)。结果提示,日粮中单独添加VA、ZnMet或联合添加这两种营养素均能促进断奶仔猪生长,改善断奶仔猪抗氧化功能。  相似文献   

20.
A grazing experiment, conducted for 90 days compared the effect of polyethylene glycol (PEG) supplementation on postpartum reproductive traits and productivity of suckling goats grazing Acacia cyanophylla Lindl. A total of 54 native adult goats (34.4 ± 5.49 kg) were randomly allocated, 24 h after kidding, to 2 treatment groups balanced for age and the number of reared kids. Goats in both treatment groups designed C and PEG grazed in acacia for approximately 5 h every day and received each on daily basis 0.3 and 0.4 kg of hay and concentrate respectively. In addition, goats in treatment PEG were initially supplemented with 10 g/day of PEG and this supplement was then increased to 20 g /goat/day over the last 60 days of the trial. Goats receiving PEG tended (P > 0.05) to spend more time browsing acacia than those in treatment C. There were no treatment effects on live weight change of the goats, growth of their kids until 90 days of age or composition of their milk in terms of fat, protein and urea contents. Similar proportions of 74.1 and 77.8% of goats resumed postpartum ovulation with a mean ovulation rate of 1.50 ± 0.61 and 1.67 ± 0.47 (P > 0.05) in respectively the PEG and C treatments. PEG supplementation was associated with an increase (P < 0.05) in ovulation rate at the second postpartum ovulation occurring approximately 27 days after the application of the nutritional treatments (1.76 ± 0.60 versus 1.25 ± 0.45); 9 of the 13 goats ovulating in the PEG treatment were bearing more than one corpus lutuem in comparison to only 3 out of 12 females in the C group (P < 0.05). The likely increased availability of proteins in the PEG receiving goats could explain their higher ovulation rate.  相似文献   

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