寒区温室型犊牛舍的设计与应用效果

为了给寒区犊牛提供适宜的生存环境,该文设计并建造了一种温室型犊牛舍。以传统犊牛舍为对照,对其温热环境和空气质量进行了测定和评价。结果表明：在舍外平均气温为-17.3℃、相对湿度为68%的条件下,犊牛岛休息区、温室型犊牛舍和传统犊牛舍内的平均气温分别为0.9、-0.7和-4.5℃,平均相对湿度分别为65%、59%和95%,平均内表面温度分别为5.7、0.8和-5.9℃;温室型犊牛舍和传统犊牛舍的CO2质量浓度分别为2 441和3 096 mg/m3,NH3质量浓度分别为0和3.9 mg/m3,1～60 d犊牛的发病率分别为33.33%和71.43%,1～60 d犊牛的死亡率分别为0和28.57%。温室型犊牛舍外围护结构保温隔热性能的提高、通风换气系统的完善、犊牛岛休息区的设置,缓解了寒区犊牛舍冬季保温与通风换气的矛盾,为犊牛创造了更加舒适的生存环境,该研究为高产奶牛的培育奠定了基础。     

Response of a red clone of Myzus persicae (Hemiptera: Aphididae) to sublethal concentrations of imidacloprid in the laboratory and greenhouse

BACKGROUND: Pest resurgence following a pesticide application may occur owing to a stimulatory (hormetic) response to sublethal insecticide concentrations. The objective of the present study was to examine the potential for a greenhouse‐derived red clone of Myzus persicae to exhibit resurgence owing to a hormetic response following a systemic imidacloprid treatment in a bell pepper greenhouse. RESULTS: No differences in mortality and fecundity were observed among apterous adults exposed to sublethal imidacloprid concentrations on excised pepper leaves fed aqueous solutions of imidacloprid. Survival of first‐generation progeny was negatively affected by imidacloprid exposure, yet surviving progeny exhibited no differences in development rates or fecundity from progeny of adults unexposed to imidacloprid. Aphid mortality declined most rapidly in clip cages on pepper leaves at the top of the pepper canopy as compared with leaves present at the middle or bottom of the pepper canopy. CONCLUSION: Imidacloprid decays rapidly in mature pepper plants, resulting in sublethal concentrations in the upper canopy in as little as 4 weeks. Sublethal insecticide concentrations have been implicated in the resurgence of pest populations; however, exposure to sublethal doses of imidacloprid are unlikely to result in pesticide‐induced resurgence of the M. persicae aphid clone examined in this study. Copyright © 2011 Society of Chemical Industry     

基于DTOPSIS法的日光温室大果番茄组合比较分析与评价

为选育出适于宁夏自治区秋冬茬日光温室种植的番茄新品种,在日光温室对57份大果番茄新组合进行了品种比较,通过调查植株性状、果实性状、番茄花叶病毒病病情指数和产量,并采用逼近理想解排序法(DTOPSIS法)对番茄单果质量、可溶性固形物含量、花叶病毒病病情指数和产量数据进行综合评价,结果表明:通过应用DTOPSIS法综合评价...     

不同架式对日光温室葡萄生长发育的影响

通过对红旗特早和火焰无核在新疆温室篱架和棚架两种架式下的物候期、品质和产量等主要经济性状表现的观察,表明篱架具有成形快、结果早的特点.而棚架具有新梢生长势缓和,易于控制生长,夏季修剪等管理方便,操作技术易于掌握.火焰无核果实成熟棚架比篱架早1 d,红旗特早棚架比篱架早6 d.火焰无核和红旗特早新梢长棚架比篱架分别长52.0 cm和62.3 cm,单果穗重棚架比篱架分别高出56.0和11.0 g,可溶性固形物含量棚架比篱架分别高出0.8和0.9个百分点.从栽培管理上及提高果实商品性综合考虑,棚架具有果实成熟提早和商品质量高的优点,以棚架栽培为好.     

日光温室环境的综合调控管理

大棚蔬菜管理必须从光照、温度、湿度、气体、土壤矿物质营养等几个方面综合进行,才能取得高产、高效之目的。     

利用现代技术提高高校图书馆纸质期刊的管理与服务

阐述了如何利用计算机网络、图书馆自动化系统等现代技术,进一步提高高校图书馆纸质期刊的管理与服务质量以及文献信息资源的利用率等相关问题。     

一线制技术在节水灌溉测控系统中的应用

一线制(1-wire)技术是Dallas公司推出的一种新技术,可通过普通双绞线传输双向数据,且能够为总线上的1-wire器件提供电能。主要用于低速或多测控对象的测控系统。设计了基于一线制总线的温室节水灌溉测控系统,以80C51为主控器,根据1-wire协议将16个测控设备挂接在一条数据线上,实现多个设备"一线牵"。PC机作为上位监视器。系统软件由TouchMemoryExecutive(TMES)和LabWindows/CVI混合编程。该测控系统可节省I/O口,结构简单,减少布线麻烦,降低了成本。     

柴达木盆地节能日光温室存在问题与发展探讨

介绍了柴达木盆地节能日光温室的发展现状、存在的主要问题,提出了发展的对策及建议。