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1.
SUNShu-hong CUI Zhi-zhong QU Li-xin 《中国农业科学(英文版)》2007,6(6):762-768
To determine if the maternal antibody from breeders vaccinated with cell culture-adapted reticuloendotheliosis virus （REV） could protect chicks from early REV infection, one-day-old chicks with or without anti-REV maternal antibodies were inoculated with REV, and then their growth rates and antibody titers to Newcastle disease virus （NDV） and avian influenza virus （AIV）, after vaccination with inactivated vaccines, were compared. This study indicated that REV infection could cause growth retardation and severely inhibit immune reactions to inactivated vaccines against NDV and Avian influenza virus （AIV, H9 and H5） in one-day-old broilers without maternal antibodies specific to REV. Maternal antibody from breeders vaccinated with an attenuated REV vaccine effectively protected REV-challenged birds from growth retardation and immunosuppression on antibody reactions to NDV and AIV vaccines. Four weeks after vaccination, the HI titers to NDV, AIV-H9, and AIV-H5 in maternal antibody positive and negative groups were 3.36 ＋- 2.04 versus 1.58± 1.69 （P〈0.01）, 6.27±3.87 versus 0.71 ± 1.60 （P〈0.01）, and 6.72±3.92 versus 0.54± 1.44 （P〈0.01）. Maternal antibodies from breeders vaccinated with REV vaccine could successfully protect chicks from REV infection and effectively prevent REV-induced growth retardation and immunosuppression in antibody responses to NDV and AIV. 相似文献
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【目的】研究PPARγ基因5'侧翼区多态性及其单倍型效应对鸡生长和体组成性状的影响,寻找影响肉鸡生长和体组成性状的QTL,为分子标记辅助选择提供相应依据。【方法】以东北农业大学肉鸡高、低腹脂双向选择品系第8、9和10世代肉仔鸡为试验材料,采用测序、PCR-RFLP等方法进行多态性位点检测及基因型分析。利用基因型信息重构单倍型并分析不同单倍型与生长和体组成性状的关系。【结果】PPARγ基因5'侧翼区存在3个多态性位点（g.-1784_-1768del17,c.-1241G＞A及c.-75G＞A）,利用其构建的单倍型对腹脂重、腹脂率、肝脏重、肝脏比例、胫骨长、股骨重、龙骨长、跖骨围等性状有显著影响（P＜0.05）;对胸大肌重、胸小肌重、胸小肌率、跖骨长等性状具有一定的影响（P＜0.2）。最小二乘分析结果表明,对于腹脂重、腹脂率等性状,BGA单倍型个体显著高于其它单倍型个体（P＜0.05）;相对于其它单倍型个体,AAG单倍型个体有较高的肝脏重、肝脏比例、胸小肌重和胸小肌率（P＜0.05）;在股骨重、胫骨长、跖骨长、跖骨围、龙骨长等骨骼生长发育性状方面,AAG单倍型个体显著优于AGG单倍型个体（P＜0.05）。【结论】PPARγ基因5'侧翼区可能存在影响鸡脂肪性状的QTL,PPARγ基因可能是影响鸡骨骼性状的重要基因之一。 相似文献
3.
苦马豆素-BSA免疫山羊的血清相关酶评价 总被引：1，自引：0，他引：1
【目的】通过评价SW-BSA免疫山羊的血清相关酶，探索SW-BSA免疫接种后对动物机体组织器官的保护作用。【方法】将24只山羊随机分为免疫对照组、免疫攻毒组和攻毒组，其中免疫对照组和免疫攻毒组接种SW-BSA，免疫攻毒组和攻毒组拌料饲喂10 g/kg BW/d甘肃棘豆草粉攻毒。【结果】血清GOT、GPT、LDH、AKP、BUN、AMA和抗体效价的检测结果表明，免疫攻毒组山羊较攻毒组山羊LDH活性升高延缓28 d，AKP活性升高延缓14 d，AMA活性降低延缓21 d，BUN活性升高延缓14 d，GOT活性升高延缓28 d。攻毒后免疫攻毒组山羊抗SW抗体水平降低，但在攻毒的第21天有一反弹，之后逐渐下降。【结论】这些酶活性延缓变化和抗体水平变化，说明在甘肃棘豆攻毒的前30 d内，SW-BSA能够有效地延缓SW对山羊肝脏、心脏和肾脏等组织器官的损伤。 相似文献
4.
LIU Wei-min WANG Bing-yun CHEN Jian-hong WANG Jun JI Hui-qin YUAN Sheng HUANG De-chun LI Kang-lin 《中国农业科学(英文版)》2009,8(11):1403-1408
To evaluate the effects of duck hepatitis virus-1 （DHV-1） on the body weight gain in duck and the effects of silymarin on it in vivo, 100 10-d-old ducks, both male and female, were collected to be subjected to the test. The experiments were conducted in 8 groups： in group 1-3, the animals were inoculated with 1：105 diluted duck hepatitis virus （DHV-1） infected allantoic fluid and given 0, 30, and 50 mg kg^-1 BW d^-1 silymarin orally, respectively. In group 4-6, the animals were inoculated with 1：5 × 105 diluted DHV-1 infected allantoic fluid and given 0, 10, and 30 mg kg^-1 BW d^-1 silymarin orally, respectively. In group 7, the animals were given 10 mg kg^-1 BW d^-1 silymafin only. Group 8 was the control one treated by injecting sterillized saline into the leg muscles. All the silymarin was given from 0 to 4 d after inoculation of the virus. By the 5th d after inoculation, the vein blood was drawn from the dorsal foot vein and the plasma samples were collected and stored at -20℃. The body weight gain （BWG） was measured from 0 to 10 d after inoculation. The plasma IGF-I, T3, and T4 concentrations were measured by radioimmunoassay （RIA）. At the virus dose of 1：5 ×105 diluted virus infected allantoic fluid, the inoculation of the virus enhanced the BWG significantly compared with that of the control （P〈 0.01）, while 10-50 mg kg^-1 BW d^-1 silymarin could counteract the effects of the virus on the BWG dose-dependently. The plasma IGF-I levels showed no correlation with the BWG, but the T3 levels showed a same tropism with the body weight gain. The present results indicated that sublethal DHV-1 enhanced the body weight gain of ducklings significantly, and the silymarin could counteract this effect in vivo. 相似文献
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女贞子对断奶仔猪生产性能及抗氧化功能的影响 总被引：3，自引：2，他引：1
选择健康的28日龄断奶的杜长大三元杂交猪48头,随机分为4个处理,每个处理3个重复,每个重复4头猪,分别为对照组(基础日粮)、抗生素组(基础日粮+20 mg.kg-1硫酸粘杆菌素)、益生菌组(基础日粮+0.2%益生菌)及女贞子组(基础日粮+1%女贞子),试验从仔猪28日龄开始到56日龄结束,试验期为28 d。旨在研究日粮中添加女贞子对断奶仔猪生产性能及抗氧化功能的影响。结果表明,女贞子组、抗生素组的平均日增重及平均日采食量均显著高于对照组(P0.05)。女贞子组血清、肝脏中SOD、GSH-PX活性均显著高于对照组(P0.05),血清、心脏、肝脏中MDA含量均显著低于对照组(P0.05)。说明女贞子对仔猪断奶期的生产性能及抗氧化功能有积极作用,且对抗氧化功能的影响优于抗生素。 相似文献
6.
为了探讨和田羊血清生化指标与小花棘豆中毒(Oxytropis glabra DC Poisoning,OgP)的关系,为和田羊小花棘豆中毒的诊治提供依据。分别以6只小花棘豆中毒和田羊与8只正常和田羊为研究对象,检测血清中谷草转氨酶(AST)、谷丙转氨酶(ALT)、碱性磷酸酶(AKP)、乳酸脱氢酶(LDH)、α-甘露糖苷酶(AMA)活性以及尿素氮(BUN)、肌酐(CR)、血糖(GLU)、甘油三酯(TG)、总胆固醇(TC)、总蛋白(TP)、白蛋白(ALB)、球蛋白(GLO)、高密度脂蛋白(HDL-C)、低密度脂蛋白(LDL-C)和极低密度脂蛋白(VLDL-C)含量。采用t检验对两组资料进行差异显著性比较后,再采用简单相关分析方法对各指标与小花棘豆中毒的关系进行分析。结果表明：与正常对照相比,小花棘豆中毒家兔血清的AST、ALT、AKP、LDH、BUN、CR、GLU、TC、GLO、LDL-C和VLDL-C值升高,AMA、TG、ALB值下降,部分组间差异显著或极显著(P＜0.05或P＜0.01),TP和HDL-C含量差异不显著(P＞0.05)。与小花棘豆中毒相关的主要因素有AMA、GLU、LDH、AKP、TG、CR,并建立回归方程：OgP=0.681-0.073AMA+0.055GLU+0.036LDH+0.041AKP。血清AMA、GLU、LDH、AKP、TG和CR对和田羊小花棘豆中毒的早期诊断、治疗、疗效观察和转归判断具有重要意义。 相似文献
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8.
【目的】评价8种杀菌剂对水稻细菌性条斑病的田间防效和使用剂量,为水稻细菌性条斑病的防控提供科学依据。【方法】以水稻细菌性条斑病感病品种五山丝苗为试验材料,于五山丝苗处于分蘖期时选用广东地区水稻细菌性条斑病优势强致病型代表菌株GDXc1608进行人工喷雾法接种,分别在接菌后48 h和第1次药后7 d采用喷雾法施药防治,调查第2次药后8种杀菌剂（20%噻唑锌SC、50%氯溴异氰尿酸SP、20%噻菌铜SC、20%叶枯唑WP、5%噻霉酮SC、1.2%辛菌胺醋酸盐AS、3%中生菌素AS和21.4%络铜·柠铜AS）在常规剂量下水稻的病情指数和植株反应,评价各药剂的田间防效及水稻安全性;选取表现较好的4种药剂分别设置3个使用剂量梯度开展盆栽防治试验,筛选目标药剂的最佳使用剂量。【结果】田间防治试验结果显示,8种药剂中以20%噻唑锌SC的防效最好,在使用剂量为450.00 mL/ha时对细菌性条斑病的防效为71.81%,其次是21.4%络铜·柠铜AS、20%噻菌铜SC和5%噻霉酮SC,对细菌性条斑病的防效分别为53.50%、52.00%和48.23%,但21.4%络铜·柠铜AS处理水稻植株出现轻微的药害症状;其他药剂防效均较差。药剂使用剂量盆栽筛选试验结果显示,4种药剂随用药量增加对细菌性条斑病的防效均逐渐提高,且各药剂不同剂量间防效均差异显著（P< 0.05）,其中20%噻唑锌SC在使用剂量375.00～525.00 mL/ha时的防效均在77.00%以上;20%噻菌铜SC在使用剂量375.00～525.00 mL/ha时的防效均在62.00%以上;21.4%络铜·柠铜AS在使用剂量481.50 mL/ha时防效为51.83%,其他试验剂量下防效均较低;5%噻霉酮SC在使用剂量37.50和52.50 mL/ha时的防效分别为49.50%和53.15%,使用剂量为22.50 mL/ha时的防效较低。【结论】20%噻唑锌SC对细菌性条斑病的防治效果较好,可作为目前细菌性条斑病田间应急防控的首选药剂;21.4%络铜·柠铜AS、20%噻菌铜SC和5%噻霉酮SC对细菌性条斑病也有较好的防效,可与20%噻唑锌SC交替或轮换使用,以延缓病菌产生抗药性;20%噻唑锌SC和20%噻菌铜SC推荐使用剂量均为375.00～525.00 mL/ha,21.4%络铜·柠铜AS和5%噻霉酮SC推荐使用剂量分别为481.50 mL/ha和37.50～52.50 mL/ha;应用21.4%络铜·柠铜AS防治时要严格控制浓度和注意喷施时间以避免产生药害。 相似文献
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Two experiments were conducted to study the effect of supplemental histamine in the diet ofearly-weaned piglets. In experiment A, 24 cross bred piglets with an average body weight of 6.10±0.40 kg,weaned at the age of 28 days, were divided into four groups, fed with basal diet of low dietary copper without(control) or with supplemental histamine at 60, 120, 180 μg kg-1 BW. During the two weeks and the thirdweek after weaning, ADG(average daily gain) of piglets were increased by 15.8% (P＜0.05), 9.5% (P＜0.10) by addition of 60 μg kg-1BW histamine, but decreased by addition of 180 μg kg-1BW histamine, whichalso increased the amount of E. coli in colon and the scour incidence. The secretion of gastric acid and pepsinwere improved by both dose of supplemental histamine (60, 180 pg kg-1BW) and gastric digesta pH were de-creased by both. Addition of 60 μg kg-1 BW histamine improved the activities of trypsin, amylase in duodelumdigesta. In experiment B, 12 cross bred piglets with an average body weight of 6.85±0.35 kg, weaned at theage of 28 days, were divided into two groups, fed with basal diet of high dietary copper without (control) orwith supplemental 60 μg kg-1 BW histamine. During the two weeks and the third week after weaning, ADG ofpiglets were increased by 9.8% (P＜0.05), 7.0% (P＜0.10). The secretion of gastric acid, activities oftrypsin and amylase in duodelum digesta, were also improved by addition of 60 μg kg-1 BW histamine. The re-sults showed that addition of histamine (60 μg kg-1 BW) in early weaned piglets could increase the secretion ofgastric acid and pepsin, reduce gastric digesta pH and scour incidence, improve activities of trypsin, amylasein duodelum digesta, and the growing performance of early weaned piglets. 相似文献
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【目的】研究中国新培育的京红蛋鸡（0—4周龄）饲粮蛋氨酸需要量。【方法】选取300只体重相近、健康的1日龄京红蛋鸡,采用单因素完全随机试验设计,随机分5个处理,饲粮蛋氨酸水平分别为0.2%、0.3%、0.4%、0.5%和0.6%,每处理5个重复,每重复12只鸡。试期28 d。在14 d随机从每个重复选2只鸡空腹12 h屠宰,取胸腺、脾脏和法氏囊,计算免疫指数;在28 d随机从每个重复选2只鸡空腹12 h屠宰,分别取免疫和消化器官,计算相应指数。【结果】（1）饲粮蛋氨酸水平未见显著影响雏鸡采食量(P＞0.05),但显著影响其增重(P＜0.05),其中0.4% Met组鸡增重最大,且该组雏鸡ADG为8.31 g•d-1,显著高于0.2%、0.5%和0.6% Met组（P＜0.05）,且呈二次曲线升高趋势;显著影响料重比(P＜0.05),其中0.5% Met组最佳（2.13﹕1）,显著低于0.2%和0.3% Met组（P＜0.05）,呈二次曲线趋势降低;显著影响体重,且呈现二次曲线升高,0.4% Met组体重为268.70g,显著高于0.2%、0.5%和0.6% Met组（P＜0.05）;群体均匀度也呈现二次曲线升高,0.5% Met组最佳（85.19%）,显著高于其它处理组(P＞0.05)。（2）14 d,饲粮蛋氨酸水平未显著影响雏鸡胸腺指数和法氏囊指数(P＞0.05),显著影响脾脏指数(P＜0.05),0.4% Met组最大;28 d,鸡胸腺、脾脏和法氏囊指数均随饲粮Met水平呈显著正相关关系(P＜0.05),且呈先升后降的趋势。其中,0.4% Met组脾脏和法氏囊指数最大,0.5% Met组胸腺指数最大。（3）饲粮Met水平未显著影响胰腺指数和十二指肠相对长度(P＞0.05),显著影响蛋鸡十二指肠、空肠和回肠重量指数和空肠回肠长度指数(P＜0.05)。随饲粮蛋氨酸水平升高,胰腺指数呈先升后降趋势,十二指肠、空肠和回肠重量指数和空肠、回肠长度指数均呈先降后升趋势。0.3% Met组十二指肠指数显著低于0.2%、0.5%和0.6% Met组(P＜0.05);0.4% Met组的空肠指数显著低于其他Met组(P＜0.05),0.5% Met组的空肠相对长度显著低于0.2%、0.3%和0.6% Met组(P＜0.05);0.4% Met组的回肠指数显著低于0.6% Met组(P＜0.05),0.3% Met组的回肠相对长度显著低于0.2%、0.5%和0.6% Met组(P＜0.05)。（4）饲粮Met水平显著影响鸡血清尿素氮、尿酸和碱性磷酸酶水平(P＜0.05),其中0.6% Met组的雏鸡血清的血清尿素氮显著高于0.2%、0.4%和0.5% Met组(P＜0.05),且0.5% Met组血清尿素氮最低、碱性磷酸酶水平最高(P＜0.05);0.6% Met组尿酸显著高于其他组(P＜0.05);但饲粮Met水平未见显著影响鸡血清白蛋白、总蛋白(P＞0.05)。5)通过对鸡体重和料重比二次曲线拟合得出饲粮Met最佳剂量为0.466%和0.507%,平均0.487%。【结论】综合鸡群增重、料重比、群体均匀度等经济指标、免疫指标、消化系统发育和血液生化指标,推荐0—4周龄京红蛋鸡饲粮蛋氨酸需要量为0.49%。 相似文献
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研究了中草药女贞子、五味子以及女贞子、五味子与葡萄糖甘露寡糖(MOS)配伍对肉鸡生产性能及免疫功能的影响.选择1日龄的艾维茵内鸡公雏180只,用单因素的试验设计随机分为6组,空白组饲喂基础饲粮,抗生素组在基础饲粮中添加5 mg/kg黄霉素,试验组分别在基础饲粮中添加1%女贞子、1%五味子、1%女贞子+0.5%MOS和1%五味子+0.5%MOS.结果表明,五味子+MOS在肉鸡生长中、后期能显著提高肉鸡的体增重,说明中草药取代抗生素作为饲料添加剂是完全可行的. 相似文献
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【目的】确定环江香猪妊娠早期胎儿体重与胎液生化参数的关系,为揭示宫内发育迟缓的发生机制及探寻其防治方法提供参考。【方法】选取体重35—40 kg的雌性环江香猪,7头,单栏饲养,每栏1头。配种第45天,颈动脉放血处死并解剖,分别称取胎儿、胎盘和子宫的重量;对每头母猪各选取2只体重最大和最小的胎儿,采集与胎儿对应的母猪羊水、尿囊液和胎盘,-20℃保存备用。【结果】与体重最大胎儿相比,体重最小胎儿的体重及母体胎盘重、子宫重和羊水+尿囊液体积分别低23%、62%、41%和39%（P＜0.05）,羊水总胆固醇浓度高30%（P＜0.05）,尿囊液丝氨酸、丙氨酸和酪氨酸浓度分别低58%、44%和29%（P＜0.05）,而赖氨酸、精氨酸和苏氨酸浓度分别高25%、40%和114%（P＜0.05）;胎盘总蛋白质含量和诱导型一氧化氮合酶的活性分别高39%和70%（P＜0.05）,结构型一氧化氮合酶的活性低22%（P＜0.05）。【结论】妊娠早期胎儿体重大小与部分生化参数密切相关。 相似文献
13.
日粮添加维生素E对免疫抑制产蛋鸡经济性状下降的调控效应 总被引：1，自引：0，他引：1
【目的】研究在基础日粮中添加维生素E对环磷酰胺诱导产蛋鸡免疫抑制的调控效应。【方法】将270 只健康尼克褐产蛋鸡随机等分为5组,每组3个重复,每个重复18只。Ⅰ、Ⅱ组饲喂基础日粮（维生素E含量44.59 mg•kg-1）,Ⅲ、Ⅳ、Ⅴ组在基础日粮中分别添加50、100和200 mg•kg-1维生素E。试验第5、6、7天,对Ⅱ—Ⅴ组产蛋鸡注射80 mg•kg-1 BW环磷酰胺建立免疫抑制模型,第Ⅰ组注射等量生理盐水。【结果】日粮中添加VE能显著提高免疫抑制产蛋鸡的产蛋性能和饲料转化率、养分表观代谢率（P＜0.05）,提高免疫抑制产蛋鸡脾脏和胸腺的相对重量和新城疫（new castle disease,ND）、H5和H9亚型禽流感（avian influenza,AI）抗体滴度及血浆谷胱甘肽过氧化物酶（glutathione peroxidase,GSH-Px）、超氧化物歧化酶（superoxide dismutase,SOD）活性（P＜0.05）,降低丙二醛（malondialdehyde,MDA）的含量（P＜0.05）;提高免疫抑制产蛋鸡血浆的PGE2、IL-1、IL-6和TNF-α含量（P＜0.05）。【结论】环磷酰胺诱导产蛋鸡所产生的免疫抑制可显著降低其生产性能、养分利用率、抗体水平、抗氧化功能及PGE2和炎性细胞因子含量;日粮中添加维生素E对免疫抑制蛋鸡具有明显的调控效应,且添加水平为50和100 mg•kg-1时效果优于200 mg•kg-1的添加量。 相似文献
14.
Peroxisome proliferator-activated receptor y (PPARy) is an important regulator of chicken preadipocyte proliferation and differentiation. In this study, polymorphisms were detected by DNA sequencing, PCR-RFLP and some other methods and three polymorphisms (g.-1784_-1768de117, c.-1241G>A and c.-75G>A) were found in the 5' flanking region of PPARy gene.Growth and body composition traits were measured in the 8th-10th generation populations of the Northeast Agricultural University broiler lines were divergently selected for abdominal fat content. Polymorphisms among individuals were screened in the above populations. The haplotype-based association analysis on growth and body composition traits was carried out. The association analysis showed that haplotypes based on three polymorphisms at 5' flanking region of PPARy gene were significantly associated with abdominal fat weight (AFW), abdominal fat percentage (AFP, AFW/BW,),liver weight (LW), liver weight percentage (LFP, LW/BW,), shank length (ShL), femur weight (FeW), keel length (KeL), and metatarsus circle (MeC) (P<0.05) and suggestive significantly associated with pectoralis major weight (PMaW), pectoralis minor weight (PMiW), pectoralis minor weight percentage (PMiWP, PMiW/BW,), and metatarsus length (MeL) (P<0.2).The least square analysis showed that the birds with BGA haplotype had significantly higher AFW and AFP than the birds with other haplotypes (P<0.05). The birds with AAG haplotype had significantly higher LW and LW/BW than the birds with other haplotypes (P<0.05). The birds with AAG haplotype had significantly higher PMiW and PMiW/BW than the birds with other haplotypes (P<0.05). The birds with AAG haplotype had significantly higher ShL, FeW, MeL, MeC and KeL than the birds with AGG haplotypes (P<0.05). The results in this study revealed that QTL affecting fatness traits may exist in 5' flanking region of PPARy gene in chickens and PPARy gene might be one of the genes having important influences on the growth and bone traits in chickens. 相似文献
15.
五味子、柠檬酸对断奶仔猪生长性能和抗氧化功能的影响 总被引：4，自引：2，他引：2
试验选择28日龄断奶二元杂交(长白×大约克)仔猪48头,平均断奶体重7.4±0.6 kg,平均分为4组,每组3次重复,每重复4头(公母各半),试验组分别添加1%CA、0.5%SC、1%CA+0.5%SC,对照组为玉米-豆粕型基础日粮,旨在研究日粮中添加五味子(SC)、柠檬酸(CA)对断奶仔猪生长性能和抗氧化功能的影响。结果表明,与对照组相比,添加CA可提高饲料利用效率(P0.05),但对日增重和平均日采食量无显著影响(P0.05)。添加SC或CA+SC除降低腹泻率外对断奶仔猪生产性能无影响(P0.05)。添加五味子可显著提高断奶仔猪肝脏或脾脏SOD活性,提高血清GR活性,降低心脏或肝脏MDA含量(P0.05)。且日粮中添加五味子可提高断奶仔猪机体抗氧化功能,添加柠檬酸或五味子可改善断奶仔猪部分生长性能。 相似文献
16.
本研究通过七个不同组合,以比较放牧条件下养到20至21个月龄时去势公牛的肉用性能。研究结果表明,所有杂种和黑白花牛在体重和日增重方面皆显著地胜过蒙古牛,但不同杂种之间的差别并不显著,主要取决于其初生体重之大小。对三项体尺和屠宰成绩进行分析的结果,体尺与屠宰率之间并无相关,但管围与实际骨量之间有显著相关。屠宰结果是利杂的屠宰率和胴体出肉率最高(各为49.05和70.20％)而黑白花较差(分别为44.28和66.68％)。在露天拴系育肥组与继续放牧组的42天对比试验期内,夏杂、安杂、西杂、利杂、黑白花、海杂和蒙古牛的育肥组平均日增重依次为976,890,738,629,600,532和333克,而放牧组则分别为-10,190,179,86,238,233和333克。同时,放牧组中黑白花死亡两头,西杂死亡一头。可见,奶牛所生的杂种的适应能力皆不如蒙古牛所生的杂种,而且看来所有改良品种都需要良好的饲料和饲养条件。 相似文献
17.
精氨酸对妊娠环江香猪胎儿生长发育的影响 总被引：1，自引：1，他引：1
【目的】研究精氨酸对妊娠环江香猪胎儿生长发育的影响。【方法】试验选取体重35—40 kg的环江后备母猪10头,单栏饲养,每栏1头。配种15 d后,随机分为2组,每组5头。试验组在基础日粮中添加0.83%L-精氨酸,对照组添加1.71%L-丙氨酸(等氮对照)。配种第45天,称取母猪体重,颈动脉放血处死母猪,收集血液,肝素抗凝,离心分离血浆;解剖母猪,记录胎儿数量、重量和存活率,采集羊水、尿囊液和胎盘,-20℃保存,用于实验室分析。【结果】结果表明,精氨酸组与丙氨酸组相比,胎儿平均个体重和黄体数分别提高14.4%(P＜0.05)和6.0%(P＞0.05),胎盘粗脂肪含量降低14.7%(P＜0.05),羊水和尿囊液中精氨酸的浓度分别提高65.0%和79.1%(P＜0.05),尿囊液中赖氨酸浓度降低28.3%(P＜0.05);血浆和尿囊液中NO的含量分别提高22.9%和66.3%(P＜0.05),胎盘中总NO合酶、诱导型NO合酶和结构型NO合酶的活性分别提高75.5%、61.7%和84.5%(P＜0.05)。【结论】提示精氨酸通过促进胎盘一氧化氮的生成促进妊娠母猪早期胎儿的生长发育。 相似文献
18.
营养水平及性别对生长育肥猪肉质性状发育规律的影响 总被引：24，自引：0，他引：24
研究了高低营养水平对长×荣杂交猪肉质性状发育影响。高低营养水平的饲粮消化能分别为 14 2和 12 0MJ/kg ,高营养水平组 2 0～ 5 0kg、5 0～ 80kg和 80～ 10 0kg阶段的饲粮蛋白质含量分别为 18%、15 5 %和 13 2 % ,低营养水平组相应为 15 5 %、13 2 %和 11 2 %。 90头试验猪随机分配到 2个处理中 ,每组 3个重复。当猪的体重分别达到 2 0kg、35kg、5 0kg、80kg和 10 0kg时 ,每重复各取 1头猪进行屠宰 ,测定屠宰性能和猪肉品质。结果表明 ,随着体重的增加 ,背脂厚、眼肌面积、肌间脂肪、失水率、肌肉次黄嘌呤核苷酸和胶原蛋白含量呈二次曲线上升 ,肌纤维面积呈线性上升 ,而瘦肉率和肌肉水分含量呈二次曲线性下降。肉色评分除 2 0kg较低外 ,全期变化不大。营养水平明显影响背脂厚、肌肉水分含量、肌内脂肪含量和失水率 (P <0 0 5或 0 0 1)。与高水平比较 ,低水平明显降低背膘厚、提高肌肉水分含量、降低肌内脂肪含量和失水率 (P <0 0 5 )。营养水平对其他肉质指标无明显影响。性别对肉质指标的影响还需进一步研究 相似文献
19.
将现代生物工程技术与祖国传统医学理论相结合 ,以富含异黄酮的药用真菌冬虫夏草菌丝体发酵液为主要原料 ,佐以人参、党参、太子参、枸杞和何首乌等天然原料 ,研制成集营养、保健和治疗为一体的多功能特殊食品——元生宝口服液 .本文介绍了该产品的配方、生产工艺和质量要求 . 相似文献
20.
A flock of AA breed chickens were reared in peterstme brood-vait chamber using high energypelleted feed, at 14 days of age, 400 birds were separated into 3 groups randomly as follows: 100 birds wereexposed to normal ambient temperature (20℃) as control group, 150 birds were exposed to low ambient tem-perature (11℃) in order to induce ascites as treatment Ⅰ group, another 100 birds were also exposed to lowambient temperature (11℃) and fed the diets containing 1% L-arginine for ascitic prophylactic treatment astreatment Ⅱ group. The blood samples were collected on 3, 4, 5, 6, 7 wk, respectively, to measure the con-tents of plasma endothelin (ET-1), angiotensin Ⅱ (Ang Ⅱ ) and cyclic adenosine monophosphate (cAMP) andcyclic guanosine monophosphate (cGMP). The results indicated that the contents of cAMP, cGMP, Ang Ⅱand the ratio of cAMP/cGMP in treatment Ⅰ and ascitic broilers were higher than that of correspondent con-trol group(P＜0.01, P＜0.05), ET-1 of preascitic broilers were higher than that of control group(P＜0.05),while there were insignificant differences with later ascitic broilers, the contents of cAMP and cGMP in treat-ment Ⅱ were higher than treatment Ⅰ and control group(P＜0.01, P＜0.05), whereas, the ratio of cAMP/cGMP and the contents of Ang Ⅱ were gradually decreased than that of control group(P＜0.05), the contentsof ET-1 were not changed. By further analysis, the increased plasma Ang Ⅱ at low ambient temperature condi-tion in broilers made endothelium cell secretion of increased ET-1, cAMP, cGMP and decreased NO. So lowtemperature accelarated ascites syndrome in broilers. Supplemented L-arginine can decrease ET-1, cAMP andcAMP/cGMP. It is concluded that cAMP mediated pulmonary hypertension syndrome in broilers. 相似文献