2001-2006年《河北农业大学学报》主要文献评价指标分析   总被引：2，自引：0，他引：2  

刘晓  韩菲  郭丽娟  郑玉欣 《河北农业大学学报(农林教育版)》2009,11(3):396-399

运用文献计量学的方法,对2001—2006年《河北农业大学学报》的引文量、总被引频次、基金论文比、影响因子、被引半衰期、Web即年下载率等主要文献评价指标进行统计分析。结果表明：《河北农业大学学报》被使用、重视程度不断提高,学术影响力越来越大。  相似文献   

淄博地区玉米粗缩病高发原因分析及综防技术研究   总被引：1，自引：1，他引：0  

陈军  卢振宇  岳霆 《农业科技通讯》2009,(12):125-127

玉米粗缩病（Maize rough dwarf fijivivus,MRDV）是我国北方玉米生产区流行的重要病害。MRDV属于植物呼肠弧科病毒组．是一种具双层衣壳的双链RNA球形病毒,由灰飞虱以持久性方式传播。经多点调查,近几年淄博地区玉米粗缩病日趋严重,局部地区爆发成灾,几近绝产。因此．控制该病害蔓延是我市玉米生产上急待解决的问题。我们在参考相关科技文献的基础上,经立项研究分析认为,防治核心以减少初侵染源生态防治为主,利用MRDV传播途径单一以及同一品种不同阶段其抗病性显著不同特点,采取适时晚播,优选抗病品种,配套化学药效防治等一系列辅助措施避免其危害。  相似文献   

基于CROPWAT模型对不同典型年冬小麦灌溉制度的研究   总被引：1，自引：0，他引：1  

陈震  黄修桥  段福义  范永申  韩启彪  孙浩  张文正 《灌溉排水学报》2012,31(6):32-34,59

利用1951—2010年的气象数据,采用CROPWAT模型对枯水、平水、丰水3个典型降水年冬小麦的灌溉制度进行研究。结果表明,3个不同的典型降水年充分灌溉净灌溉定额分别为353.3、342、296.2mm,灌水次数依次为8、7和6次;4次关键水条件下净灌溉定额分别为229.1、222.2、212.3mm。  相似文献   

贵州省晴隆县石漠化种草养畜存在的问题及对策探索   总被引：2，自引：1，他引：1  

郭菁  孙泉忠王钰 彭璨 《中国农学通报》2013,29(20):21-25

晴隆县当前普遍存在人畜共粮、牲畜青绿饲料不足等问题,极大地影响了种草养畜的效益。为了进一步挖掘种草养畜的效益潜力,笔者对晴隆县当前种草养畜存在的问题进行了调查与分析,提出充分利用晴隆县优越的雨热条件发展“周年高效供青”的饲草生产模式,转变传统的农业种植结构,将为晴隆县带来巨大的经济效益、生态效益和社会效益。  相似文献   

重庆市耐高温粳稻育种结硕果     

刘馥芳  陈伟标  赖汉龙 《北京农业》2011,(9):52-53

在重庆市科委农作物良种创新工程支持下,重庆市农科院自2004年起开始耐高温杂交粳稻研究,目前,已选育出多个优秀的耐高温杂交粳稻亲本材料和品种．品种示范667米。产均在800千克以上,达到超级稻标准,米质达国颁二级以上,其中1个品种获准今年开始参加市级区试,有望明年通过全市品种审定。  相似文献   

干旱对雨养旱地小麦产量的影响与施肥技术效应     

褚清河  薛献来 《山西农业科学》2011,39(4):336-338

对降水较好与相对干旱年份冬小麦施肥的增产效果进行了比较研究,结果表明,施肥在干旱年份对小麦的增产效果大于降水相对较好的年份;旱地大于水地;不同年份同一施肥技术间并未表现出显著的增产效果;干旱年份调控施肥技术的增产效果显著高于配方施肥技术,施肥技术是仅次于灌溉的抗旱技术。  相似文献   

First isolation of hirame rhabdovirus from freshwater fish in Europe     

E Borzym  M Matras  J Maj‐Paluch  M Baud  C De Boisséson  C Talbi  N J Olesen  L Bigarré 《Journal of fish diseases》2014,37(5):423-430

A rhabdovirus was isolated in cell culture inoculated with tissue material from diseased grayling, Thymallus thymallus (L.), originating from a fish farm affected by a mortality episode in Poland. Diagnostics tests showed that the virus was not related to novirhabdoviruses known in Europe, nor to vesiculovirus‐like species, except perch rhabdovirus (PRhV) with which it shared moderate serological relations. However, RT‐PCR with PRhV probes gave negative results. To identify the virus, a random‐priming sequence‐independent single primer amplification was adopted. Surprisingly, two of the obtained sequences exhibited a high identity (>99%) with hirame rhabdovirus (HIRRV), a novirhabdovirus usually found in fish in marine Asiatic countries, for instance Japan, China and Korea. The full‐length sequence of the phosphoprotein gene (P) demonstrated a higher identity of the present isolate with HIRRV from China compared with the Korean isolate. An identical viral sequence was also found in brown trout, Salmo trutta trutta L., affected by mortalities in a second farm in the same region, after a likely contamination from the grayling farm. To our knowledge, this is the first report of HIRRV in Europe, and in two hosts from fresh water that have not been described before as susceptible species.  相似文献   

甜菜筒喙象Lixus subtilis Boheman在藜麦上大暴发     

张桂芬  张金良  万方浩  梅丽  冼晓青  董杰  郭自军 《植物保护》2017,43(2):202-207

甜菜筒喙象是世界潜在入侵象虫网收录的一种重要象甲科昆虫,主要为害甜菜,以及藜科、苋科和蓼科的一些杂草,国内外未曾见有为害藜麦的报道,2016年7月下旬我们发现该种象虫在北京严重为害藜麦。本文首次报道甜菜筒喙象在藜麦上的发生为害情况,同时介绍了其形态识别特征、生物学特性,给出了防治建议,并提出下一步研究重点,为有效防范甜菜筒喙象的进一步扩散为害,保障我国藜麦产业的健康发展提供科学支撑。  相似文献   

Morbidity and mortality associated with a Standardbred yearling sale          下载免费PDF全文

J. S. Weese 《Equine Veterinary Education》2017,29(4):205-207

In the 2‐week period following a Standardbred yearling sale, 5 horses from the sale died or were subjected to euthanasia. Three were confirmed as equine herpesvirus type 1 myeloencephalopathy (EHM), while EHM was suspected in 2. Clinical abnormalities were reported in 77 of 177 (43.5%) other yearlings during the 14‐day period after the sale; however, no diagnostic testing was performed. Eleven secondary cases of suspected EHM in horses in contact with yearlings purchased at the sale were identified. No cases of EHM were identified associated with the same sale in 2003; however, there was no difference in morbidity with clinical abnormalities reported in 39/96 (41%) horses sold that year (P = 0.70). Yearling sales have an inherent risk of pathogen exposure and illness is common in purchased horses. Disease in these horses could have been associated with a wide range of respiratory pathogens; however, the incidence of confirmed or suspected primary and secondary EHM cases associated with the 2002 yearling sale highlight the potential for significant outbreaks of disease.  相似文献   

Forelimb Conformation,Sales Results,and Lifetime Racing Performance of 2-Year-Old Thoroughbred Racing Prospects Sold at Auction     

《Journal of Equine Veterinary Science》2017

To determine associations between carpal and fetlock conformation and later performance, 292 two-year-old (2YO) Thoroughbred horses were examined at a public auction. Two observers graded carpal and fetlock conformation in the frontal view, and subject weights were estimated (weight tape), and height was measured. Subject age, gender, and workout distance and time were retrieved from sales data. Lifetime racing data was retrieved from the Jockey Club database. Mild to moderate deviations from straight forelimb conformation at the carpus or fetlock occurred in 85% of 2YO Thoroughbreds and had no substantive effect on lifetime racing performance. Carpal and fetlock conformation are associated. Greater age, female gender and faster workout were associated with better short and long-term racing outcomes. The ability to start a race at 2YO was associated with improvements in several measures of racing success. The lack of an association of forelimb conformation with most measures of racing performance will assist producers and consumers of young racing stock in the determination of the need for corrective procedures in young horses and the importance of deviations at purchase. Speed of workout and the ability to start at 2YO were associated with each other and with an improvement in several racing outcomes.  相似文献