Evaluation of Thermal Environment of Cowshed and Correlation Analysis Between Thermal Parameter and Physiological Parameter of Dairy Cows in Central Plain of Hebei

The purpose of this study was to evaluate thermal environment of cowshed in four seasons in central plain of Hebei,and analyze the correlation between the temperature parameters and physiological indexes of dairy cows.Three dairy cow houses with different building structures were selected,the thermal parameters (ambient temperature (Ta) and relative humidity (RH)) and physiological parameters (respiratory rate,rectal temperature and body surface temperature) were detected.The results showed that the Ta,RH and index of temperature and humidity (THI) changed significantly in four seasons (P<0.05),the average daily temperature in summer was the highest (28.59 ℃),and the average daily temperature in winter was the lowest (1.55 ℃).In summer,dairy cows were suffering from mild heat stress for 15.5 h every day,and from moderate heat stress for 6.0 h.In winter,dairy cows were under mild cold stress for an average of 12.0 h per day.The Ta and THI of three cowsheds in each season had no significant differece (P>0.05),except for that in winter.Compared with the cowshed with low wall or roller blind,the average Ta in the cowshed with only roof was 0.80-1.27 ℃ higher in summer and 1.36-1.84 ℃ lower in winter.In addition,the physiological parameters of dairy cows were extremely significantly higher in summer than those in other seasons (P<0.01).The respiration frequency or rectal temperature of cows among cowsheds in summer were significantly different (P<0.05),and the seasonal difference in body surface temperature was significant (P<0.05).Correlation analysis of thermal parameters and cow physiological parameters showed that the respiratory frequency,rectal temperature and body surface temperature were positively correlated with THI and Ta (P<0.05).However,there was no significant correlation between physiological parameters and RH (P>0.05).The results provided scientific basis for environment evaluation of cows,and physiological status of dairy cows were inferred according to environmental thermal parameters,which provided data for occurrence and early warning of stress.     

中药"增免散"对肉鸡免疫器官及生长发育的影响

1日龄艾维茵肉鸡健雏200只随机分4组，“增免散”按饲料量0．5％、1％、1．5％分别添加到Ⅰ、Ⅱ、Ⅲ组，对照组为Ⅳ组。Ⅰ、Ⅱ、Ⅲ组从第7天开始投药，各组于第7、21天用LaSota活苗免疫，然后于第7、14、28、49天测定血液中HI抗体水平，并检测“增免散”对免疫器官和生长发育的影响。结果表明，中药“增免散”按1％、1．5％添加能显著提高Lasota活苗接种雏鸡的HI抗体水平，延长其持续时间，能促进雏鸡免疫器官的生长发育，并能促进肉鸡的生长发育，提高饲料转化率。     

鹅源H5N1亚型禽流感病毒感染SPF雏鸡免疫球蛋白含量的变化研究

以7日龄SPF雏鸡为试验动物,采用常规间接酶联免疫吸附试验(IELISA)法,对鹅源H5N1亚型禽流感病毒(AIV)感染SPF雏鸡后,其泪液、气管液、肠液、胆汁的IgA、IgG、IgM含量的动态变化进行了检测.结果发现,鹅源H5N1亚型中强毒AIV感染SPF雏鸡后,其泪液、气管液、肠液、胆汁的免疫球蛋白IgA、IgM含量均在1～3 d或1～4 d显著低于相应对照雏鸡(P＜0.05),而感染后第5天,上述被检指标开始升高,并于5～8 d或5～14 d,病毒感染雏鸡的IgA和IgM显著高于对照雏鸡(P＜0.05或P＜0.01).表明7日龄SPF雏鸡感染AIV后的早期,其消化道和呼吸道的体液免疫功能降低.     

木麻黄不同种源综合评价

针对福建沿海防护林木麻黄品种单一问题，从澳大利亚引进7个木麻黄树种30个种源种子进行造林试验，通过多目标决策法综合评估，筛选出适应能力较强且速生优质的细枝木麻黄（Casuarina cunninghamina）15002种源、山神木麻黄（C．collia）19111种源，粗枝木麻黄（C.glauca）15218种源、13128种源和13987种源，对这些种源进一步进行家系和单株选择，结合无性繁殖的途径，可推广应用于沿海沙地特别是后沿地段造林。     

基于网络新媒体语言特征探讨高校思想政治教育

新媒体技术的迅猛发展对广大高校学生的网络语言使用情况产生了潜移默化的影响.本文从新媒体对网络语言的改变入手,基于语言学与高校思想政治教育,探究了新媒体语言的特征,探讨了新特征对高校思想政治教育的影响.     

茶多酚、茶多糖对兔动脉血压的影响

兔静脉注10mg／mL的茶多酚和茶多糖溶液，观察对动脉血压的影响，结果表明：注射荼多酚1—3mL后收缩压6次降低（9％-20％），2次升高（13％和20％），3次无变化；舒张压2次升高（20％和140％），9次无变化；注射茶多糖1-4mL后收缩压9次降低（2％-29％），3次升高（13％-40％），5次无变化；舒张压4次降低（10％-200％），7次升高（20％-50％），6次无变化。上述浓度和剂量的茶多酚、茶多糖对兔动脉血压均无显著影响（P〉0．05—0．5）。     

森林防火应急通信工作发展研究

围绕科学发展这一主题,紧密结合当前森林防火工作实际,以综合演练破解难题,以一线调研剖析现状,从全面提升对森林防火应急通信的科学认识的角度,系统分析了森林防火应急通信工作的重要性,工作方法,发展现状、存在的问题及今后的工作思路.     

论儒家道德与当代大学生道德教育的结合

儒家传统道德思想中的"修身"、"仁爱"、"礼仪"、"信"、"义"、"廉耻"、"忠"、"孝"、"自省"、"慎独"等内容,对培养当代大学生基本道德准则、养成遵守日常社会规范的习惯,仍然具有十分积极的作用.将儒家传统道德思想与当代大学生思想道德教育有机结合,有利于充实和丰富大学生德育教育内容,提高德育工作的实效性.