规模化养猪室内设备及其发展趋势

分析了规模化养猪室内设施设备的类型,并对其发展趋势进行了初步探讨.     

粮食楼房仓结构和储粮工艺研究进展

通过对国内粮库调查,发现目前的楼房仓一般采用框架结构承重体系,其用途主要用于储存包装粮食,楼房仓现在还不是储存粮食的主要仓型。粮食楼房仓内温度、湿度等储藏条件显著好于平房仓,相同储藏时间楼房仓储藏粮食品质比平房仓优越,且有多种方式实现散粮和包粮的进出仓作业。但是散装楼房仓受到粮食竖向和水平侧压力的作用,不同粮堆形式和裝粮方式对结构产生的影响研究还不透彻,一直还没有针对粮食楼房仓的设计规范,造成结构设计依据不充分,制约了楼房仓的发展。     

楼房仓改变仓储堆放模式储藏稻谷保质保鲜的探讨

广东省粮油储运公司第三仓库于上世纪80年代先后建造了两座四层的楼房仓.楼房仓储粮要比平房仓困难要多得多,因为仓房相连,很容易造成虫害相互交叉感染,同时楼房仓两边墙体窗户较多,阳光直接照射增多,不利于安全储粮.当然楼房仓储粮也有有利的一面,除顶层外,其余楼层不存在仓顶热辐射,有利于控温储粮.楼房仓是按包装粮分堆储存设计的.     

农村养猪存在的主要问题及发展对策杨

近几年来,随着猪肉价格的大幅上涨,农户养猪的热情高涨。但是,我们必须清醒地认识到,农村养猪绝大多数还属于传统饲养方式,一家一户养几头猪的大有人在。由于缺乏科学养猪知识,农户在猪种的引进、卫生防疫、疾病控制等方面存在的问题较多,这些问题严重制约着养猪生产。因此,分析农村养猪存在的主要问题,针对这些问题找出解决的办法,有着十分重要的意义。     

正确认识当前的养猪形势及对策

一是要正确认识当前的养猪形势第一，当前生猪存栏确实大幅增加。经过国家生猪扶持政策和在长达两年多的高价位市场的拉动下，当前生猪存栏较2006年年底已经大幅增加，并且是全国性的。据不完全统计，2008年上半年国内繁殖母猪存栏增加比例较大，比去年同期生猪存栏增加15％～20％，繁殖母猪增加20％～30％，     

垣曲县农业发展优势分析及存在问题探讨

以垣曲县为例,对本地的农业发展优势进行简述,指出存在的主要问题,并提出了建议。     

云南省发展无公害蔬菜的优势及对策探讨

650223 云南省昆明市学府路云南省农业科学院农业质量标准与测试技术研究所     

养猪生产的环境污染及防控措施

随着养猪生产集约化、规模化的快速发展,猪场排泄物造成的环境污染比较严重,已引起社会的广泛关注。畜牧业的污染2／3是来自养猪,养猪生产带来的水污染、土壤污染以及大气污染等综合环境污染,已成为制约养猪业可持续发展的关键问题。     

超级杂交稻模式株型的光合优势

以三系杂交稻汕优63为对照，比较研究表明，具有超级杂交稻模式株型的培矮64S/E32有以下生理优势。（1）叶面积指数前期较小，中期稳健，后期衰减缓慢、维持较高水平；（2）抽穗后剑叶和倒2叶的比叶重显著或极显著大于对照；（3）后期上3叶叶绿素含量衰减缓慢，变化平稳；（4）上3叶单位叶面积气孔数目比对照多19.2%，达极显     

甘肃省马铃薯产业优势及育种可持续发展探讨

1产业现状甘肃马铃薯在粮食作物中的比重占24．48％,马铃薯产业已成为甘肃最有生产潜力和开发前景的农业优势产业,属于北部一季作区全国十大马铃薯主产区之一,在全省14个地、州、市种植,覆盖74个县、区,其中种植面积6666．7hm2以上的县区有28个,2009年全省种植面积达66．7万hm2,总产达到1100万t。马铃薯良种补贴已全覆盖。     

The Design of Courtyard-Style Elderly Care Buildings in Cold Regions

Different climatic zones should consider different architectural spatial organization forms when designing buildings. In this paper, the design scheme of Half Courtyard located in the Guanzhong Plain of Shaanxi is selected for research to explore how to construct ecological elderly care buildings in cold regions. The design scheme has been proven to increase solar energy efficiency, add natural ventilation, improve the insulation performance of building envelopes, and create a comfortable indoor climate.     

Lighting Design of Chinese Traditional Buildings and Application of New Type of Little Power LED

This paper is a part of the research on the lighting techniques of the traditional Chinese buildings in Summer Palace,Beijing,which is a sub-project of the Municipal Research Project on the Correlative Techniques for Beijing's Sustainable Development(Y0604017040391).The work,which the authors took part in,on the most representative Chinese traditional buildings in Summer Palace,is taken as a case study on lighting design and lab simulated experiments and checked by practical result,illustrating a working frame for other similar lighting design works.     

楼顶平台蔬菜水培系统设计及应用效果

在平顶楼房的顶部平台，利用循环水培技术进行蔬菜无土栽培，具有较高的经济效益和社会效益，在南方地区，每年可生产绿叶蔬菜12～16茬，平均每平方米可生产蔬菜52～66kg，每平方米面积创利58元。其栽培关键技术是利用防风墙、防护棚等设施，克服楼房顶部小气候条件变化激烈问题。     

浅谈设计素质对食品工程专业人才的重要性及培养途径

讨论了设计素质对于食品工程专业人才的重要性及目前培养模式中存在的问题,并通过课程设置、师资建设、课堂教学方法、引导设计理念及实践教学等方面,探索了有效提高食品专业人才的设计素养。     

浅析出口食品热力杀菌工艺设计及有效性验证

热力杀菌是出口食品企业产品质量安全控制的关键工序。论述了热力杀菌工艺设计的依据及影响因素,并介绍了通过对热力杀菌过程的验证确保工艺的有效性和产品的安全性。     

A Deliberation in Design Standard for Energy Efficiency of Buildings in Hot Summer and Cold Winter Zone

A contradiction existed in "Design Standard for Energy Efficiency of Residential Buildings in Hot Summer and Cold Winter Zone(JGJ-134-2001)" is pointed out through calculations and the contradiction is perfectly solved by means of interrelation principle between window and wall.At the same time the constant form principle of equal thermal resistance in parallel connection between window and wall is advanced to make the controlling indexes for enclosure in buildings satisfy perfectly the requirement for energy efficiency.     

我国农业适度经营规模测算研究

为促进中国农业规模经营发展,在对中国农业规模经营现状分析的基础上,构建农业适度经营规模测算模型,对中国主要农作物的适度规模经营面积以及对不同区域不同农产品品种适度规模经营面积进行量化测算。结果表明：全国平均粮食生产适度规模经营面积为7.3hm2;大中城市蔬菜适度规模经营面积平均为0.61hm2;棉花为21.42hm2,苹果为0.37hm2。散养生猪平均适度规模为388头,绵羊为234.8只。另外,对不同农产品品种,测算了各省不同的适度经营规模。为加快中国农业土地流转,实现规模经营提供了科学依据。在此基础上,提出鼓励农民转出土地、创新合作社的机制、形成现代农业产业联合体等对策建议。     

Design of Cooling/Heating Floor AC Systems in Residential Buildings

This paper puts forward a new way in air_conditioning,which combines the fresh_air supply unit and such floor radiation system for the dehumidication and cooling in summer or heating in winter. By analyzing its advantages and limitations, it is found that this so called Cooling/Heating Floor AC System can improve the IAQ of residential building while keep high efficiency quality. It is also recommended that an methodology for the HVAC system designing,which will ensure the reduction of energy cost of users.     

Analysis on the Stress of the Tunnel Underground High Buildings

With the problem of the city development, it becomes very important and urgent to research the utilization of the urban underground space. The authors discuss the interaction of high buildings and tunnel which belongs to a project at Dadukou region in Chongqing. The authors simulate this condition in computer and analyses the stress around the tunnel and find the rang of stress concentration. At last,the authors offer some references for underground-space opening of the tunnel under high buildings.