加热解晶对蜂蜜抑菌活性的影响

结晶蜂蜜加热是蜂蜜完全液化最方便的方法,控温热处理可以安全有效地液化结晶蜂蜜。该研究在45℃、55℃和65℃的不同温度下加热液化不会影响蜂蜜对大肠杆菌和金黄色葡萄球菌的总体抑菌活性。实验结果为蜂蜜的解晶温度控制提供参考。     

奥芬哒唑可湿性粉剂驱除藏羊线虫绦虫试验

使用５,１０,２０ｍｇ／ｋｇ剂量奥芬哒唑可湿性粉剂,对放牧藏系绵羊进行驱除线虫、绦虫试验。试验结果：５ｍｇ／ｋｇ剂量对消化道线虫、绦虫的虫卵转阴率,下降率均为１００％,对原圆科线虫幼虫转阴率为６０％,下降率为９４．１％;１０,２０ｍｇ／ｋｇ剂量的虫卵（幼虫）转阴率,下降率均为１００％,安全性良好。按５ｍｇ／ｋｇ剂量给当年生羔羊进行大群秋季示范驱虫,结果粪检虫卵（幼虫）呈阴性,驱虫羔羊比同一地区未驱虫的当年生羔羊保活率提高４．４８个百分点,全部投药羊未发生毒副反应。试验初步证明奥芬哒唑可湿性粉剂安全有效,与本品原粉、片剂的驱虫效果及安全性一致。而该剂型投服方便,计量准确,省时省力,易推广。     

湿地植被污染物的分析和处理

最近几年我国农业飞速发展,过度使用农药以及化肥,周围河流受到非常严重的污 染。湿地资源比较丰富的地区可以充分利用湿地,对农业造成的污染进行处理。调查河套地区 所有的湿地的情况,对湿地的植被以及水文等进行分析,探讨湿地植被通过怎样的方式缓解农业 污染物对环境造成的压力。     

郏县红牛结节性皮肤病的治疗办法

郏县红牛结节病是牛养殖业中的常见疾病,是由病毒引起郏县红牛的一种急性、亚急性或慢性、传染病。该病的临床特征是病牛发热、消瘦,淋巴结肿大,皮肤、水肿、局部形成坚硬的结节或溃疡为主要特征。     

70℃干热处理德兰臭草种子内生真菌的研究

为了更好地研究内生真菌与德兰臭草（Melica transsilvanica）的互作关系,需获得内生真菌种群已失活的德兰臭草种子。本试验采用70℃干热的方法对德兰臭草带菌种子分别处理5 d,10 d,15 d,20 d,25 d和30 d,以不作处理的种子为对照,通过测定各处理后种子的萌发指标、生长指标和植株内生真菌数量等综合评价内生真菌的灭活效果。结果表明,70℃干热处理能有效杀灭德兰臭草种子中的内生真菌;70℃处理5 d后,与对照相比,宿主染菌率下降为50%;处理25 d时,种子和植株中均未分离出内生真菌。同时,70℃处理25 d时,种子发芽率、发芽势、发芽指数、植株鲜重和胚根、胚芽长度以及植株株高、叶片数、分蘖数、叶宽和茎粗与对照相比均没有显著影响。值得一提的是,70℃干热处理种子可促进植株须根数的增多和根长的增加。综合比较得出,70℃干热处理25 d能使德兰臭草种子中全部内生真菌失活,是一种简单、方便、可行的方法。     

A Five-Day Progesterone Plus eCG-Based Fixed-Time AI Protocol Improves Fertility Over Spontaneous Estrus in High-Producing Dairy Cows Under Heat Stress

This study compared the efficiency of a five-day or standard (nine-day) progesterone-based regimen combined with equine chorionic gonadotrophin (eCG) in a fixed-time AI (FTAI) protocol for dairy cows. The data examined were derived from 3577 inseminations conducted in three dairy herds. Animals with no estrus signs detected over 21 days were randomly assigned to a PRID-9 or PRID-5 group. Cows in each group received a progesterone intravaginal device (PRID) for 9 or 5 days, respectively, PGF_2α and eCG on PRID removal, and GnRH 48 h later. Fixed-time AI was performed 12 h after the GnRH dose. Cows artificially inseminated following spontaneous estrus during the study period were considered as controls. Based on the odds ratio, the likelihoods of animals in PRID-9 in the warm (conception rate [CR] of 22.3%) and cool (32% CR) periods, and control animals in the warm period (26.6% CR) becoming pregnant were reduced (by factors of 0.6, 0.3 and 0.4, respectively) compared with the control animals in the cool period (CR of 43.7%). The risk of a twin pregnancy was higher (51.4%) for cystic PRID-9 cows (by a factor of 3.6) and lower (9.9%) for cyclic PRID-5 animals (by a factor of 0.4) compared with the PRID-9 cyclic cows. These findings indicate that the proposed protocol achieves similar results during the cool or warm season to those obtained when AI is conducted at spontaneous estrus during the cool season. In addition, PRID-5 reduced twin pregnancy compared with PRID-9.     

鸡常见胚胎病及其防治

鸡胚胎病是指鸡在胚胎发育过程中所出现的疾病。有效控制鸡的胚胎病,对提高受精率、出雏率、健雏率及提高鸡的生产力和养殖效益都有十分重要的意义。对鸡常见胚胎疾病的病因、疾病类型以及防治措施进行了综述。     

猪瘟并发附红细胞体病的综合防制措施

猪瘟在我国流行已久 ,近年来猪附红细胞体病也屡屡发生 ,而二者发生混合感染的临床报道极少。笔者在 2 0 0 0 -2 0 0 2年间 ,经流行病学调查、病理学检查和实验室检验认为 :豫、鲁、皖地区发生的某些猪病是由猪瘟病毒和附红细胞体混合感染所致。并采用中西药结合防治措施 ,使发病率大大减少 ,治愈率达 86%以上     

对奶牛胎衣不下的认识和处理

本文结合本场的生产实际，讨论了母牛胎盘的特点，胎衣不下的症状与诊断；着重讨论了本病的发病率及其影响因素，并将病因分析、归纳成一个示意图；最后综述了多项治疗和预防胎衣不下的措施，如灌服羊水，注射激素，用维生素A、D、E和亚硒酸钠，灌服中药，手术剥离以及电刺激等。