共查询到20条相似文献，搜索用时 31 毫秒
1.
为进一步了解藏猪、藏梅猪和大约克夏猪对高致病性猪繁殖与呼吸综合征病毒（HP-PRRSV） JXA1分离株具有不同易感性的分子机理,本研究建立实时荧光定量RT-PCR方法比较分析藏猪、藏梅猪和大约克夏猪感染JXA1分离株前、感染后4、7和14 d肺脏中HSPG2、SIGLEC1、CD163、VIM和NMMHC-ⅡA 5个PRRSV受体基因的差异表达情况。结果显示,藏猪感染JXA1分离株后4和14 d肺脏中HSPG2的表达量显著高于感染前（P < 0.05）,而感染后7 d HSPG2的表达量显著低于感染前（P < 0.05）,藏梅猪在感染后14 d HSPG2的表达量显著高于感染后7 d（P < 0.05）;藏猪感染后4和14 d肺脏中SIGLEC1的表达量显著高于感染前（P < 0.05）,大约克夏猪感染后4、7和14 d SIGLEC1的表达量均显著低于感染前（P < 0.05）;藏猪和藏梅猪感染后14 d肺脏中CD163的表达量均显著高于感染前（P < 0.05）,大约克夏猪则感染后7和14 d均显著低于感染前（P < 0.05）;藏猪感染后7 d肺脏中VIM的表达量显著高于感染前（P < 0.05）,大约克夏猪在感染后7 d显著低于感染前（P < 0.05）;藏梅猪感染后4 d肺脏中NMMHC-ⅡA的表达量显著高于感染前（P < 0.05）,大约克夏猪在感染后4和14 d NMMHC-ⅡA的表达量显著高于感染前（P < 0.05）。结果表明,5个PRRSV受体基因中,SIGLEC1和VIM基因可能是影响藏猪、藏梅猪和大约克夏猪对JXA1分离株易感性存在差异的潜在关键基因。 相似文献
2.
为了解藏猪肾脏中促红细胞生成素（erythropoietin,EPO）的表达与其低氧适应之间的关系,采用Western blotting技术检测西藏林芝地区（海拔约3000 m）的高海拔藏猪（ZZ）和高海拔大约克夏猪（YZ）、北京中顺景盛养殖场（海拔约100 m）的低海拔藏猪（ZB）和安徽合肥市（海拔约为36 m）的低海拔大约克夏猪（YH）肾脏组织EPO蛋白的表达量。结果发现,ZZ、ZB、YZ、YH的EPO表达量,在A组试验中,高海拔藏猪与高海拔大约克夏猪差异显著（P<0.05）,高海拔大约克夏猪与低海拔藏猪、低海拔大约克夏猪差异极显著（P<0.01）;B组试验中,高海拔藏猪与低海拔藏猪差异不显著（P>0.05）,高海拔藏猪与高、低海拔大约克夏猪差异显著（P<0.05）;C组试验中,高、低海拔藏猪间差异显著（P<0.05）,低海拔藏猪与高、低海拔大约克夏猪差异极显著（P<0.01）。当大约克夏猪处在高海拔应急状态下时,EPO的表达量高于藏猪。而长期生活在高原的大约克夏猪EPO的表达量较藏猪低,但高于低海拔大约克夏猪。EPO的稳定表达是藏猪适应高原低氧环境的一个重要因素,而高原大约克夏猪肾脏组织内EPO的高表达,则是大约克夏猪适应高原低氧环境的生理调节过程。 相似文献
3.
Chaitawat Sirisereewan Yonlayong Woonwong Jirapat Arunorat Roongtham Kedkovid Teerawut Nedumpun Sawang Kesdangsakonwut Sanipa Suradhat Roongroje Thanawongnuwech Komkrich Teankum 《Tropical animal health and production》2018,50(7):1509-1518
The Chinese highly pathogenic porcine reproductive and respiratory syndrome virus (HP-PRRSV) has caused a severe threat to the pig population in Southeast Asian countries. The purpose of this study was to investigate the efficacy of a type 2 PRRSV modified live vaccine (PrimePac? PRRS, lineage 7) against a Thai HP-PRRSV (10PL01, lineage 8). Three-week-old PRRSV-free pigs were randomly assigned into three groups. Vaccinated challenged group (group 1, n?=?16) was immunized with PrimePac? PRRS vaccine at 3 weeks old. The unvaccinated challenged group (group 2, n?=?16) was injected with PBS at 3 weeks old, and unvaccinated unchallenged group (group 3, n?=?10) was served as a negative control. At 9 weeks old, all groups, except the negative control group, were challenged with the Thai HP-PRRSV. All pigs were monitored daily during 10 days post-infection (dpi) and were necropsied at 10 and 17 dpi. The results revealed that vaccinated challenged pigs showed significantly lower (p?<?0.05) mean rectal temperatures, clinical respiratory scores, lung lesion scores, and levels of virus load in serum and lung tissue compared with the unvaccinated challenged pigs. Moreover, vaccinated challenged pigs exhibited PRRSV-specific serum neutralizing antibodies at the end of the experiment. Our findings indicated that the studied type 2 PRRSV vaccine provided partial protection against the Thai HP-PRRSV infection based on the body temperature, levels of viremia, and the severity of lung lesions. These results demonstrated that partial protection of PrimePac? PRRS vaccine might be useful for controlling HP-PRRSV infection in the endemic area. 相似文献
4.
为探究藏猪和大约克猪肌节线粒体肌酸激酶2（creatine kinase,mitochondrial 2,CKMT2）基因多态性位点及其在各组织中的表达差异,试验采用Sanger测序法对藏猪（50头）和大约克猪（60头）CKMT2基因起始密码子上游1 000 bp区域进行单核苷酸多态性（single nucleotide polymorphism,SNP）筛选与基因分型;180日龄藏猪和大约克猪（各10头）屠宰后分别采集心脏、背脂和背最长肌组织,采用实时荧光定量PCR技术检测CKMT2基因在各组织中的表达水平。结果显示,在CKMT2基因起始密码子上游1 000 bp区域,筛选到5个SNPs位点：G-357A、T-469C、G-649T、A-784G和A-953G,且藏猪与大约克猪等位基因频率差异明显。转录因子预测发现,这些SNPs位点与骨骼肌生长发育、肌肉能量代谢、抗缺氧有关。藏猪CKMT2基因在背最长肌和心脏组织中的mRNA表达量极显著高于大约克猪（P<0.01）,在背脂中的mRNA表达量极显著低于大约克猪（P<0.01）,推测CKMT2基因具有正向调控抗低氧和肌肉组织生成、负向调控脂肪生成的作用,该分析结果与藏猪和大约克猪的品种特性相吻合。本试验结果为进一步探索猪生长发育、脂肪沉积和低氧适应性提供了一定的新思路。 相似文献
5.
藏猪和大约克猪ACADM基因表达量与脂肪沉积性状的相关性分析 总被引：1，自引：0，他引：1
为探究中链酰基辅酶A脱氢酶(ACADM)基因在不同品种猪组织中的表达水平,并分析其与猪脂肪沉积性状的相关性,采用Sanger测序法对藏猪(58头)和大约克猪(60头)ACADM基因起始密码子上游1 kb区域进行了单核苷酸多态性(SNPs)筛选与基因分型,选取180日龄藏猪和大约克猪各10头屠宰后分别采集肝脏、背脂、心脏和背最长肌组织,利用RT-qPCR技术检测了ACADM基因的表达水平,同时测定其背膘厚和背最长肌组织中肌内脂肪含量。结果显示:在ACADM基因起始密码子上游1 kb区域,存在C-101G和C-569G这2个突变位点,藏猪与大约克猪等位基因频率呈极显著差异(P<0.01);在藏猪与大约克猪的肝脏、背脂、背最长肌和心脏组织中ACADM基因表达趋势完全一致,藏猪极显著高于大约克猪(P<0.01);经ACADM基因表达量与背膘厚、肌内脂肪含量相关性分析发现,ACADM基因mRNA相对表达量与背膘厚和肌内脂肪含量呈显著正相关(P<0.05)。通过以上结果推测这2个突变位点可能是调控ACADM基因表达的重要功能位点,从而导致猪脂肪沉积性状的差异。本研究为进一步开展ACADM基因对猪脂肪沉积的调控机制研究提供了重要支撑。 相似文献
6.
WANG Zhenmei DUAN Mengqi LU Fenghui WANG Shixin QIANGJIUZHUOMA TAN Zhankun ZHANG Jian SHANG Peng 《中国畜牧兽医》2007,47(10):3305-3313
In order to explore the polymorphism site and difference of expression level of creatine kinase,mitochondrial 2 (CKMT2) gene in muscle segments of Tibetan and Yorkshire pigs,in this experiment,Sanger sequencing method was used to screen and genotype the single nucleotide polymorphism (SNPs) in the 1 000 bp region upstream of the initiation codon of CKMT2 gene in 50 Tibetan and 60 Yorkshire pigs.The expression of CKMT2 gene was detected by Real-time quantitative PCR in heart,back fat and longissimus dorsi muscle of 180-day-old of 10 Tibetan and 10 Yorkshire pigs.The results showed that 5 SNPs (G-357A,T-469C,G-649T,A-784G and A-953G) were found in the upstream 1 000 bp region of the initiation codon of CKMT2 gene,the allele frequency of Tibetan pigs at all sites were significantly different from those of Yorkshire pigs.These SNPs were related to skeletal muscle growth and development,muscle energy metabolism and anti-hypoxia.The mRNA expression of CKMT2 gene in longissimus dorsi muscle and heart of Tibetan pigs were extremely significantly higher than Yorkshire pigs (P<0.01),and the mRNA expression in back fat of Tibetan pigs was extremely significantly lower than Yorkshire pig (P<0.01),which indicated that CKMT2 gene could positively regulate anti-hypoxia and muscle tissue production,and negatively regulate fat production,the analysis results were consistent with the breed characteristics of Tibetan and Yorkshire pigs.This experiment results provided some new ideas for further exploration of pig growth and development,fat deposition and hypoxia adaptability. 相似文献
7.
LI Wen-tong LIU Ying ZHOU Rong SHEN Zi-quan DONG Sheng-hua SONG Xiao-tao WANG Yue-jiang TANG Hui 《中国畜牧兽医》2017,44(7):2057-2064
To further understand the germplasm characteristics of Jiangquan Black pig,100 kg Jiangquan Black pigs (10 barrows, 10 sows) and 10 Duroc×Landrace×Yorkshire (DLY) pigs under the same conditions were randomly selected to analyse the slaughter performance and meat quality according to related rules. After slaughtered,the carcass index (carcass weight, loin muscle area, carcass length and backfat thickness etc), meat quality physical indicators (pH, meat color, marbling, drip loss etc), gerneral chemical index (the contents of crude protein, intramuscular fat, moisture and ash etc) and the proportion of amino acids in Jiangquan Black pig were analyzed. The results showed that, Jiangquan Black pig carcass lean meat rate was relatively low, the loin muscle area was reduced by about 30% (P<0.05) compared with DLY pig, while the backfat thickness was higher than that of DLY pig (P<0.05). The meat color, marbling, drip loss, cooking loss, water loss rate index and intramuscular fat content of Jiangquan Black pig were significantly better than that of DLY pigs (P<0.05), the rate of water loss and drip loss and cooking loss were decreased by 4.0%, 3.1% and 2.7%, intramuscular fat content increased by 150.0%. Therefore, The lean yield of Jiangquan Black pig was less than DLY pig, but water retention property, intramuscular fat content, meat color, marbling, meat quality indexes were significantly better than that of DLY pig. In conclusion, Jiangquan Black pig could provide good quality pork for consumers. 相似文献
8.
本研究旨在探讨国内外猪种水通道蛋白7(aquaporin 7,AQP7)基因多态性,以期为进一步研究猪AQP7基因与脂肪沉积性状的相关性提供理论依据。采用PCR-RFLP方法检测了猪AQP7基因第4内含子G/A在6个猪群中的多态性分布。检测结果表明,经PstⅠ酶切后发现了GG、AG和AA 3种基因型。在莱芜猪、里岔猪、鲁莱猪、杜洛克猪和大约克猪5个猪种中G均为优势等位基因,而在沂蒙猪中A为优势等位基因。χ2检验结果发现,基因型分布在莱芜猪、鲁莱猪和沂蒙猪群体达到了哈代－温伯格平衡(P>0.05),而里岔猪、杜洛克猪和大约克猪群体中均未达到平衡状态(P<0.05);不同基因型在群体间的分布差异极显著(P<0.01)。群体遗传特性分析表明,有效等位基因数在0.3084~0.4953之间,多态信息含量在0.2609~0.3726之间,属于中度多态。本研究结果提示,地方猪种、引进猪种和培育猪种AQP7基因内含子4的基因型分布存在明显差异,A等位基因作为脂肪沉积的有利等位基因尚需进一步验证。 相似文献
9.
为了解江泉黑猪的产肉和肉质特性,本试验选取在相同条件下饲养的100 kg左右的江泉黑猪阉公猪、母猪和杜长大三元杂交猪各10头按照相关规定进行屠宰和肉品质测定。对两种猪胴体指标（胴体重、胴体长、眼肌面积、背膘厚等）、肉质的物理指标（pH、肉色、大理石纹、滴水损失等）、常规化学指标（粗蛋白质、肌内脂肪、水分、灰分含量等）及江泉黑猪氨基酸含量进行了测定。结果表明,与杜长大三元杂交猪相比,江泉黑猪胴体瘦肉率较低,眼肌面积降低了30%左右（P<0.05）,而胴体背膘厚较高（P<0.05）。江泉黑猪在肉色、大理石纹、滴水损失、失水率、烹饪损失和肌内脂肪含量等指标上均显著优于杜长大三元杂交猪（P<0.05）,其中滴水损失、失水率和烹饪损失分别降低了约4.0%、3.1%和2.7%,肌内脂肪含量提高了约150.0%。由此可见,江泉黑猪在瘦肉产量上低于杜长大三元杂交猪,但在保水性、肌内脂肪含量、肉色、大理石纹等肉质指标上明显优于杜长大三元杂交猪,可为消费者提供品质优良的猪肉。 相似文献
10.
试验通过可拆迁式猪舍与传统(固定)猪舍的饲养对比试验,研究了冬季可拆迁式猪舍对生长肥育猪的生长性能及舍内温度和相对湿度的影响。选取同期转群、体重30 kg左右杜大长生长猪216头,随机分成可拆迁式猪舍组和传统猪舍组,每组3个重复,每个重复36头。试验至猪体重达到100 kg左右出栏结束。结果表明:可拆迁式猪舍组试猪的平均日增重和平均日采食量分别比传统猪舍组提高17.28%(P0.01)和12.13%(P0.01),饲料料增重比降低7.00%(P0.05);可拆迁式猪舍的舍内平均温度为20.33℃,比固定猪舍的16.86℃高3.47℃,比室外的15.15℃高5.18℃,差异均极显著(P0.01)。试验结果表明,可拆迁式猪舍对生长育肥的生长性能和室内环境控制优于传统猪舍。 相似文献
11.
《畜牧与生物技术杂志(英文版)》2016,(4)
Background: Vascular endothelial growth factor A(VEGFA) can induce endothelial cell proliferation, promote cell migration, and inhibit apoptosis. These processes play key roles in physiological blood vessel formation and pathological angiogenesis.Methods: In this study, we examined VEGFA gene expression in the heart, liver, and kidney of Tibetan pigs(TP), Yorkshire pigs that migrated to high altitudes(YH), and Yorkshire pigs that lived at low altitudes(YL).We used PCR and Sanger sequencing to screen for single nucleotide polymorphisms(SNPs) in 5'-flanking DNA and exons of the VEGFA gene. Quantitative real-time PCR and western blots were used to measure expression levels and PCR products were sequenced.Results: Results showed that the VEGFA m RNA and protein expression in heart, liver and kidney of TP was higher than that in YH and YL. In addition, the m RNA sequence of the pig VEGFA gene was conserved among pig breeds, and only five SNPs were found in the 5'-flanking region of the VEGFA gene, the allele frequency distributions of the 5 SNPs were not significantly different between the TP, Yorkshire(YL), and Diannan small-ear(DN) pig populations.Conclusion: In conclusion, the Tibetan pig showed high levels of VEGFA gene expression in several hypoxic tissues, which suggests that the VEGFA gene may play a major functional role in hypoxic adaptation. 相似文献
12.
试验旨在研究成纤维生长因子22（fibroblast growth factor 22,FGF22）及其受体2（fibroblast growth factor receptor 2,FGFR2）、硫酸乙酰肝素糖蛋白（heparan sulfate proteoglycans,HSPG）在庆阳黑山羊正常睾丸与隐睾中的分布与表达,探究其在山羊睾丸发育和隐睾形成中的作用。采用HE和特殊染色观察其组织学结构特征,进而以免疫组织化学及免疫荧光法结合形态计量学统计研究FGF22、FGFR2和HSPG在山羊正常睾丸及隐睾中的定位。结果表明,山羊隐睾较正常睾丸生精小管缩窄,腔内各级生精细胞排列紊乱,间质的胶原纤维和网状纤维增多,糖原类物质阳性反应较弱,FGF22在隐睾组织的Leydig、Sertoli细胞、管周肌样细胞及血管内皮细胞整体表达密度相较于正常睾丸显著减弱（P<0.05）。HSPG在正常睾丸表达显著强于隐睾（P<0.05）,间质组织变化尤其明显。FGFR2在隐睾组表达显著增高（P<0.05）,且以Sertoli细胞强阳性表达为主。庆阳黑山羊隐睾较正常睾丸发育异常,间质组织有纤维化趋势,糖原类物质含量减少;FGF22及HSPG表达降低应与隐睾局部环境温度变化密切相关;FGFR2在隐睾组表达增高提示其在发生隐睾时可能通过Sertoli细胞进行适应性调节。 相似文献
13.
Jung K Ha Y Ha SK Han DU Kim DW Moon WK Chae C 《Journal of veterinary medicine. B, Infectious diseases and veterinary public health》2004,51(2):72-76
The aim of these experiments was to investigate the potential antiviral effect of Saccharomyces cerevisiae beta-glucan on the pneumonia induced by swine influenza virus (SIV). Forty colostrum-deprived 5-day-old piglets were randomly divided into four groups of 10. The 20 pigs in groups 1 and 2 were administered Saccharomyces cerevisiae beta-glucan orally (50 mg/day/pig; En-Bio Technology Co., Ltd) for 3 days before SIV infection and those in groups 3 and 4 were given culture medium/diluent alone. Groups 1 and 3 were inoculated intranasally with 3 ml of tissue culture fluid containing 2 x 10(6) tissue culture infective doses 50% (TCID(50))/ml of SIV and those in groups 2 and 4 were exposed in the same manner to uninfected cell culture supernatant. The microscopic lung lesions induced by SIV infection (group 1 pigs) were significantly more severe than those induced by infection in animals pre-administered beta-glucan (group 3) (P < 0.05). Significantly more SIV nucleic acid was detected in the lungs of pigs experimentally infected with SIV only (group 1) at 5, 7 and 10 days post-inoculation (dpi) compared with lungs from pigs pre-administered beta-glucan and infected with SIV (group 3) (P < 0.05). The concentrations of interferon-gamma (IFN-gamma) and nitric oxide (NO) in bronchoalveolar lavage fluid from pigs pre-administered beta-glucan and infected with SIV (group 3) were significantly higher than for any other group at 7 and 10 dpi for IFN-gamma, and at 5, 7 and 10 dpi for NO (P < 0.05). Saccharomyces cerevisiae beta-glucan reduced the pulmonary lesion score and viral replication rate in SIV-infected pigs. These findings support the potential application of beta-glucan as prophylactic/treatment agent in influenza virus infection. 相似文献
14.
15.
Yu J Wu J Zhang Y Guo L Cong X Du Y Li J Sun W Shi J Peng J Yin F Wang D Zhao P Wang J 《Veterinary microbiology》2012,158(3-4):316-321
This study was aimed at determining the effect of highly pathogenic porcine reproductive and respiratory syndrome virus (HP-PRRSV) on Haemophilus parasuis (HPS) in co-infection. A quantitative real-time PCR targeting infB gene, which is conserved among different HPS serotypes, was developed to improve the accuracy and speed of the detection of HPS. A total of 32 four-week-old conventional pigs were distributed randomly into four groups: pigs in group I were intranasally infected with HP-PRRSV first, and were then intraperitoneally inoculated with HPS on 5 days after HP-PRRSV infection; pigs in group II were intranasally inoculated with HP-PRRSV alone; pigs in group III were intraperitoneally inoculated with HPS alone; pigs in group IV were intraperitoneally inoculated with physiological saline. The amount of HPS in serum on 0, 3, 6, 9 and 12 days post-inoculation (dpi) with HPS were detected using the established quantitative real-time PCR. Clinical signs, pathological changes and histopathological lesions were observed. The amount of HPS in serum reached 10(6)copies/μl at 3 dpi with HPS in pigs of group I, while it arrived 10(5.7)copies/μl at 9 dpi with HPS in pigs of group III. The HPS loads in hearts and lungs were much higher than in other tissues. The study showed that HP-PRRSV was able to accelerate HPS infection and loads. 相似文献
16.
17.
试验选用84头体重接近10 kg的杜洛克×长白×大约克三元杂交(DLY)阉公猪,随机分成2组,每组6个重复,每个重复7头猪。研究在NRC(1998)标(准对照组)和荣昌猪饲养标(准试验组)2种饲粮条件下,营养水平对DLY生长肥育期血液胰岛素、背最长肌IMFc、AMPI、R含量及ACC mRNA表达量的影响。结果表明:①荣昌猪饲养标准下,各阶段试验组背最长肌肌内脂肪含量均高于对照组,50kg时达到了显著水平(P<0.05)。②试验组背最长肌cAMP水平50kg时低于对照组(P<0.01);IR含量80kg时显著低于对照组(P<0.05)。 相似文献
18.
松辽黑猪和长白猪催乳素受体基因第10外显子多态性与繁殖性状的关联分析 总被引：2，自引：0，他引：2
试验旨在探讨催乳素受体(prolactin receptor,PRLR)基因遗传多态性及其与松辽黑猪、长白猪繁殖性状的关联性。采用PCR-RFLP方法对松辽黑猪和长白猪PRLR基因第10外显子进行了多态性检测,并运用最小二乘法分析各基因型对母猪繁殖性能的遗传效应。结果表明,两个猪种中都存在A、B 2个等位基因和AA、AB、BB 3种基因型,松辽黑猪和长白猪等位基因A的频率分别0.551和0.578,A为优势基因。两个猪种的AA基因型个体的断奶仔猪数、乳头数都显著高于其他两个基因型(P＜0.05),初产松辽黑猪AA基因型个体的TNB、NBA显著高于其他基因型(P＜0.05),对其他繁殖性状影响不显著,但呈现出AA＞AB＞BB的趋势。 相似文献
19.
Fang ZF Peng J Liu ZL Liu YG 《Journal of animal physiology and animal nutrition》2007,91(7-8):361-368
This study was conducted to investigate the effect of two distinct enzyme preparations on nutrients' digestibility and growth performance of growing pigs fed diets based on corn, soya bean meal and Chinese double-low rapeseed meal (DLRM). The two enzyme preparations were Enzyme R, a preparation extracted from fermentation of a non-GMO fungus Penicillum funiculosum, developed for multi-grain and multi-animal species; and Enzyme P, a xylanase preparation from Trichoderma longibrachiatum, for pigs fed corn-based diets only. Both enzymes were tested at 0, 0.25 and 0.50 g/kg feed using 70 crossbred male pigs (Large Yorkshire x Landrace) in five dietary treatments and seven replicates in each treatment, for growth period from 27 to 68 kg live weight in 49 days. Results showed that the supplementation of both enzymes (1) increased total-tract digestibility of dietary energy from 77.5% (control) to 81.4% (Enzyme R, p < 0.05) and 81.9% (Enzyme P, p < 0.05); of neutral detergent fibre from 41.0% (control) to 57.8% (Enzyme R, p < 0.05) and 60.0% (Enzyme P, p < 0.05); (2) improved average daily gain from 786 g (control) to 829 g (Enzyme R, p < 0.05) and 846 g (Enzyme P, p < 0.05); and numerical increases in feed intake from 1.96 kg/pig/day (control) to 2.01 (Enzyme R) and 2.00 (p > 0.05) and feed conversion ratio from 2.50 (control) to 2.42 (Enzyme R) and 2.36 (Enzyme P, p < 0.05); (3) there was a dose response but no significant differences were observed in enzyme efficacy between the two enzyme preparations. The present study demonstrated beneficial effects of applying xylanase-based enzymes to improve feeding values of pig diets based on corn, soya bean meal and DLRM. 相似文献
20.
低蛋白质氨基酸平衡饲粮对哺乳母猪生产性能及氮利用的影响 总被引：3，自引：0，他引：3
本研究旨在探讨低蛋白质氨基酸平衡饲粮对哺乳母猪生产性能及氮利用的影响。选择24头胎次、体重和体况相近的长白×大白哺乳母猪,随机分为4组,每组6头,每头母猪哺育12头仔猪。各组母猪分别饲喂粗蛋白质(CP)18%、17%、16%、14%的饲粮(后3种为低CP氨基酸平衡饲粮),哺乳期21d。结果表明:CP14%饲粮使母猪体重损失显著增加(P<0.05);CP14%饲粮组仔猪断奶窝重和窝增重分别较其他试验组显著下降(P<0.05);CP17%、CP16%饲粮可显著提高母猪CP和有机物的消化率(P<0.05),CP17%、CP16%、CP14%饲粮可显著提高母猪粗脂肪的消化率(P<0.05);CP16%、CP14%饲粮组总氮摄入量、吸收氮、总氮排出量均显著低于其他试验组(P<0.05),CP18%饲粮组血清尿素氮显著高于其他试验组(P<0.05)。 相似文献