中港美盛有机水溶肥料在温室番茄上的应用效果探究

在温室番茄常规施肥基础上设置中港美盛有机水溶肥料喷肥3次、喷施同等量清水、空白共3个处理、3次重复试验后得出：在常规施肥的基础上,番茄结果期喷施中港美盛有机水溶肥料每亩每次100 mL稀释500倍液3次,能有效促进植株生长,处理1每667 m²每月较处理2、处理3分别增产624.3 kg、1 090 kg,增产22.01%和46.0%,且喷肥处理较常规施肥红果率增加12.96个百分点,成熟期提前2～3 d,增产增收效果显著。适宜在日光温室经济作物上大面积推广应用。     

优溴胺对人工诱发鸡大肠杆菌病的疗效观察

本试验人工诱发1周龄艾维茵商品肉仔鸡患上大肠杆菌病,然后用优溴胺3个不同剂量对致病鸡进行预防和治疗试验,以硫酸阿米卡星、盐酸左旋氧氟沙星和头孢噻呋钠作为对照药物,评价优溴胺对鸡大肠杆菌病的预防和治疗效果。试验结果表明：优溴胺对鸡大肠杆菌病具有较好的预防和治疗效果,高、中剂量组的保护率和治愈率均明显高于硫酸阿米卡星组、盐酸左旋氧氟沙星组和头孢噻呋钠组;保护率高达93.3%（P〈0.05）,治愈率高达90.0%（P〈0.05）。     

PLC在输煤控制系统中的应用

采用ABControlLogix1756系列产品PLC实现了对输煤过程的控制,通过建立以太网环网和双缆双网的控制层网络ControlNet以及主机的双机热备提高了系统的可靠性。利用GEiFixSCADA上位机监控软件实现了对输煤与配煤系统的监视和控制。     

日粮中添加血浆蛋白粉对仔猪生长性能的影响

血浆蛋白粉是一种稳定、高效、安全的动物蛋白原料。通过在仔猪日粮中添加血浆蛋白粉探究血浆蛋白粉对仔猪生产性能的影响,结果发现试验组仔猪的生产性能优于对照组,说明日粮中添加血浆蛋白粉对仔猪的生产性能有改善作用。     

Evaluation of efficacy of several disinfectants against Campylobacter jejuni strains by a suspension test

The objective of this study was to determine the efficacy of 16 active compounds and 11 commercial disinfectants against Campylobacter jejuni. Two reference strains (one of avian origin and the other isolated from bovine) and two avian field strains were tested in suspension test in the presence and absence of serum. Chloramine-T, povidone–iodine (1% available iodine), cetylpiridinium chloride, ethanol, isopropanol, chlorhexidine digluconate, formaldehyde, phenol, and 10 of the 11 commercial formulations (eight of them based on quaternary ammonium compounds) showed an excellent disinfectant capability, resulting in the highest level of reduction (>6-log₁₀) in colony-forming units of the four C. jejuni strains compared regardless of the presence or absence of organic material. These compounds might be helpful in the adoption of environmental control measures against C. jejuni.     

Epizootic heamorragic disease

Epizootic haemorrhagic disease (EHD) is an infectious non-contagious viral disease transmitted by insects of the genus Culicoides which affects wild and domestic ruminants. The causative agent, the epizootic haemorrhagic disease virus (EHDV), belongs to the family Reoviridae, genus Orbivirus and shares many morphological and structural characteristics with the other members of the genus such as bluetongue, African horse sickness and equine encephalosis viruses. In recent years EHD outbreaks have been reported in countries bordering the European Union. They caused disease in cattle and severe repercussion on the livestock industry of the affected countries. In the light of recent European bluetongue epizootic these events pose an increasing threat to the European Union. This review includes the most recent information regarding the virus and the disease as well as tools for its diagnosis and control. It is our conviction that more attention should be drawn to both EHDV and the disease itself in order to fulfil all these gaps and not to be unprepared in case future possible incursions.     

Modelling population dynamics and response to management options in the poultry red mite Dermanyssus gallinae (Acari: Dermanyssidae)

The poultry red mite Dermanyssus gallinae is a major pest and widespread ectoparasite of laying hens and other domestic and wild birds. Under optimal conditions, D. gallinae can complete its lifecycle in less than 10 days, leading to rapid proliferation of populations in poultry systems. This paper focuses on developing a theoretical model framework to describe the population dynamics of D. gallinae. This model is then used to test the efficacy and residual effect of different control options for managing D. gallinae. As well as allowing comparison between treatment options, the model also allows comparison of treatment efficacies to different D. gallinae life stages. Three different means for controlling D. gallinae populations were subjected to the model using computer simulations: mechanical cleaning (killing once at a given time all accessible population stages), sanitary clearance (starving the mite population for a given duration, e.g. between flocks) and acaricide treatment (killing a proportion of nymphs and adults during the persistence of the treatment). Simulations showed that mechanical cleaning and sanitary clearance alone could not eradicate the model D. gallinae population, although these methods did delay population establishment. In contrast, the complete eradication of the model D. gallinae population was achieved by several successive acaricide treatments in close succession, even when a relatively low treatment level was used.     

辽宁西部地区光热水资源变化对农业生产的影响

利用辽西地区1960-2009年的气象资料,应用常规数理统计方法,重点分析了近50a来在全球变暖背景下辽宁西部地区光热水资源的变化趋势,以及对当地农业生产的影响。结果表明:近50a来,辽宁西部光照资源下降幅度较大,年日照时数趋势减少406h;年平均气温和年≥0℃积温呈现明显的升高趋势,年平均气温趋势升高1.7℃,年≥0℃活动积温增加307℃.d;降水呈现出减少趋势,年降水量趋势减少62mm,在年代际尺度上波动显著。对于光照资源丰富的辽西地区来说,日照时数减少还未表现出不利影响;而气温升高、降水减少使该地区气候呈现暖干化趋势,这将对辽西农业的发展产生巨大影响。本文通过对光温水资源变化趋势的研究,旨在提高气候变暖对农业生产影响的认识,增强应对气候变化的能力,为农业结构调整提供依据。     

乙酰甲喹性质、毒性与替代药物

简要介绍了乙酰甲喹的结构特点、药动学性质、常见的中毒症状、临床控制方法,分析了哪些药物可以替代乙酰甲喹,提出了更优选的肠道疾病控制策略,期望对绿色养殖的推广、临床疾病的控制有借鉴意义。     

2019年猪病流行情况与2020年流行趋势及防控对策

文章结合实验室的监测数据,概述了2019年我国非洲猪瘟、猪繁殖与呼吸综合征、猪瘟、猪伪狂犬病、猪流行性腹泻等重要猪病的流行状况,着重总结了非洲猪瘟疫情发生情况。分析了2020年非洲猪瘟等疫病的流行趋势,同时提出了坚持生物安全、严格处置非洲猪瘟疫情等防控策略。