巴西近年来拖拉机产品的生产和市场走势浅析

0概况巴西联邦共和国,位于南美洲东部.全国总面积851.20万km2,约占南美洲总面积的一半,是南美洲面积最大的国家。总人口为18065.4万人(2004年),也是南美洲人口最多的一个国家,其中55%为白种人,38%为混血种人,葡萄牙语为其官方语言,     

金亿发力小麦机主推新款占市场

在一跃成为玉米多功能收获机销售量全国领先和政府补贴台数领先的企业之后,2008年,山东金亿机械制造有限公司(以下简称"金亿公司")欲继续发力于自走式小麦收获机市场.     

关于发展水稻收获机械化的思考

1.选好机型 目前,水稻联合收割机机型很多,应按先进适用原则,选择性能好、效率高、适应性强、可靠性好、价格合理的机型.2006年在江西省吉水县推广的机型有丹霞4L-0.5、柳林-160、三联-160和碧浪4L-1.0等.经使用,丹霞4L-0.5型具有体积小、转移方便、适用于山区和种粮大户的特点,每台每季可作业7hm2以上,农民反映较好.柳林-160型具有质量好、功效高、故障少的特点,适应于平原大田块和为其他农户服务用,每台每季作业13hm2以上,深受机手和农民欢迎.     

一次突击的机耕行动——1954年太原至文水的远征

紧急受命 1954年,山西省在文水县南安乡谢家寨村建起了山西省碱地改良站,前苏联专家在视察该改良站土地后提出:对留茬的玉米地,必须先用拖拉机进行深耕(耕深22cm),等过了冬季,才能检验出防治盐碱的效果.在当时,前苏联专家的建议就是最权威的命令,山西省农业厅的领导不敢怠慢,赶紧组织人手、分配任务,由于条件有限,整个晋中地区只有榆次县张庆乡有几台拖拉机,在汾河岸以西还没有一台农业机械.     

农业装备盛会多彩妆点中原

(本刊讯)天上飞行助威、地上热歌劲舞。10月26日上午,2007年全国农机产品订货交易会暨第十一届中国国际农业机械展览会开幕式在郑州国际会展中心     

Audi（奥迪A6）MOST-BUS结构和环型断裂诊断法的分析

介绍了Audi(奥迪A6)MOST-BUS结构,传输和工作过程的特点,针对MOST-BUS结构,提出MOST-BUS系统故障诊断的基本思路和环型断裂诊断法.     

精确称量配料机设计

现阶段,我国制药行业星罗棋布,生产水平良莠不齐,持有生产许可证的生产企业已达6000多家,但其中90%为中小型企业,规模小,技术落后,设备陈旧,产品质量安全亦无保障.针对当前国际上全自动配料设备价格相当昂贵、国内目前同型设备短缺及我国中小企业的实际生产状况,设计并制造了自动控制配料机,该机通过PLC编程实现药品配方原料成分识别、料斗自动旋转、制动和成份称重后的自动倒料过程.介绍了配料机的组成、工作原理以及结构设计过程.     

解决联合收割机籽粒损失问题的探讨

随着浦城县农村经济的快速发展,联合收割机的使用越来越普遍,作为一种致富的工具,联合收割机越来越受到用户的重视和欢迎。但用户在使用联合收割机过程中时常反映"跑粮"(籽粒损失)问题。     

货车挂断高压线供电职工抢修忙

2006年8月28日20时10分,一辆装有泥土的翻斗汽车在安徽省宿松某开发区工地卸土时,不慎将一条10 kV高压线挂断,致使县城西南方上千户居民和单位突然断电.由于高压线采用的是绝缘线,车主才幸免于难.     

豪丰印象

5月下旬,正是小麦夏收时节,笔者如约来到位于河南省许昌县张潘镇的河南豪丰机械制造有限公司.10多年前我曾来过当时还是许昌县农机总厂的这家企业,当年的厂长,现任公司董事长刘少林早已等在办公楼前,一口纯正的河南腔,还是那个大嗓门,虽然岁月的沧桑给他增添了些许皱纹,但眼前这个一米八的中原汉子依旧那么豪爽,那么开朗,竟使人看不出多少岁月磨砺的痕迹.在寒暄后的访谈和参观中,一个现代农机具生产企业和它的当家人的形象逐渐在我的脑海中清晰起来.     

化探样品中微量元素Ag、W、Mo、Sn、Bi、Cu、Pb、Zn、Ni、Co、Cr的水平撒料光谱定量分析

针对化探样品批量大,元素多,检出限低等特点,采用水平电极撒料法,对化探样中多种微量元素进行了光谱定量分析.将样品与缓冲剂1:1混匀,采用W-100光栅摄谱仪(光栅刻线1200条/毫米,二级光谱)进行水平撒样摄谱,谱板经暗室处理后,在东德GFE760μ测微光度计上用P标尺测光,以△P-logc绘制工作曲线,查出含量.本法采用了特制的撒样漏斗,改善了下料的均匀性,提高了分析精度;以Ge和Pd作内标消除工作条件变化对谱线强度的影响;同时还试选了SiO2:C:Na2SO4＝61:30:9的混合物作缓冲剂,提高了弧烧的稳定性,获得了较高的再现性.本文还采用了一种单元素线减光器对Ag3382.9进行减光,使Ag的测定上限由5×10-6提高到30×10-6.本法操作简便快速,成本较低,一次可测定Ag、W、Mo、Sn、Bi、Cu、Pb、Zn、Ni、Co、Cr等多种元素,检出限为Ag 0.03×10-6,W 0.5×10-6,Mo0.05×10-6,Sn 0.4×10-6,Pb 1×10-6,Zn 3×10-6,Cu 0.5×10-6,Bi 0.1×10-6,Ni 0.3×10-6,Co 0.3×10-6,Cr 1×10-6,基本上达到了化探普查找矿定量分析的要求.     

2010年世界健康食品展望

当前,中国粮油企业的生存与发展已与世界粮油经济的发展息息相关。无论是粮油企业全面亏损的2004年,还是粮油价格大起大落的2008年,世界其他各国粮油政策和价格的变化均对中国的粮油产业发展造成了很大的影响。全面了解国际粮油发展新动向、掌握世界粮油食品发展新方向,从宏观上为企业找到准确定位,是每位粮油企业家、每位粮油人都必须具备的。正所谓知己知彼,百战不殆,希望以下这些国际前沿信息能为您带来收获。     

王水消解法同时测定土壤中Cu,Zn,Ni,Cr,Pb,Cd的方法研究

为了快速、准确地检测土壤中多种重金属元素,建立一种王水消解同时测定土壤中Cu,Zn,Ni,Cr,Pb,Cd的方法.选取8种具有广泛代表性的土壤标准物质对王水消解法进行考察,结合土壤标准物质标准值,通过大量试验数据对该方法做出全面评价.     

冀、鲁、豫、苏、皖五省农机夏收跨区作业调研报告

农机跨区作业是我国农民自发进行的又一项伟大的制度创新,为促进我国农业机械化发展做出了重要的贡献.为此,采用问卷调查法、文献资料法和数理统计法,对冀、鲁、豫、苏、皖等省505户参与跨区作业的农机大户进行了问卷调查.以问卷数据为基础,分析了农机大户的自身特征和经营状况,并总结了影响跨农机大户参与跨区作业的主要因素,最后提出了相应的对策建议.     

安徽省砀山县丰产农机合作社:创新模式发展优势服务

砀山县丰产农机服务专业合作社位于安徽省宿州市砀山县朱楼镇朱楼村,成立于2015年5月13日。合作社目前占地1.33 hm^2(20余亩),拥有成员200余人,拖拉机40多台,收割机18台,灌溉机械14套,植保飞机80多架,烘干机6组,配套农具230多台(套),机械资产达到1 200余万元。     

Advection,evaporation, and surface resistance

Summary We study the effect of surface resistance r (whether of monolayers on free water or plant diffusive resistance) on evaporation rate, energy balance, and microclimate, under advective conditions. We use power-law representations of the vertical profiles of mean windspeed and eddy diffusivity, and exploit two known similarity solutions, one for a step-function change of surface concentration, and the other for a step-function change of surface flux density. To a very close approximation, these two contrasting canonical advective problems yield the same (spatially variable) boundary layer transfer coefficient expressing the ratio of the surface flux perturbation to the surface concentration perturbation. Adopting this coefficient reduces the (spatially variable) surface energy balance for the advective boundary layer with surface resistance to a quadratic equation, with the solution yielding the fetch distances x at which the surface temperature assumes a given value To. With To (x) established thus, the other significant properties of the boundary layer follow simply and directly.The results reveal the profound influence of r, especially at small x. As boundary layer atmospheric resistance increases with x, r becomes relatively less important. It can be regarded as primarily reducing advective effects. Antievaporation films thus work best on small water surfaces in arid surroundings, but are less effective the larger the water body and the moister the surrounds. If leaf temperatures are not limiting, increasing r has greatest effect for small vegetated areas in an arid environment, but may not be optimal for extensive continuous monocultures. Control of surface resistance offers means of manipulating microclimate, for example when arid landscapes are watered for this purpose. The exploratory nature of this investigation, and its many limitations, are stressed.     

The FARMSCAPE approach to decision support: farmers', advisers', researchers' monitoring,simulation, communication and performance evaluation

FARMSCAPE (Farmers', Advisers', Researchers', Monitoring, Simulation, Communication And Performance Evaluation) is a program of participatory research with the farming community of northeast Australia. It initially involved research to explore whether farmers and their advisers could gain benefit from tools such as soil characterisation and sampling, climate forecasts and, in particular, simulation modelling. Its current focus is facilitating the implementation of commercial delivery systems for these same tools in order to meet industry demand for their access. This paper presents the story of what was done over the past decade, it provides performance indicators of impact, it reflects on what was learnt over this period and it outlines where this research is likely to head in the future.Over the past 10 years, the FARMSCAPE team employed a Participatory Action Research approach to explore whether farmers could value simulation as a decision support tool for managing their farming system and if so, could it be delivered cost-effectively. Through farmer group engagement, on-farm trials, soil characterisation, monitoring of crops, soils and climate, and sessions to apply the APSIM systems simulator, FARMSCAPE represented a research program on decision support intervention. Initial scepticism by farmers and commercial consultants about the value of APSIM was addressed by testing its performance both against measured data from on-farm trials and against farmers' experiences with past commercial crops. Once this credibility check was passed, simulation sessions usually evolved into participants interactively inquiring of the model the consequence of alternative management options. These ‘What if’ questions using APSIM were contextualised using local climate and soil data and the farmer's actual or proposed management rules.The active participation of farmers and their advisers, and working in the context of their own farming operations, were the key ingredients in the design, implementation and interpretation of the FARMSCAPE approach to decision support. The attraction of the APSIM systems simulator to farmers contemplating change was that it allowed them to explore their own system in a manner equivalent to learning from experience. To achieve this, APSIM had to be credible and flexible. While direct engagement of farmers initially enabled only a limited number of beneficiaries, this approach generated a commercial market for timely and high quality interactions based on soil monitoring and simulation amongst a significant sector of the farming community. Current efforts are therefore focused on the training, support and accreditation of commercial agronomists in the application of the FARMSCAPE approach and tools.The FARMSCAPE approach to decision support has come to represent an approach to guiding science-based engagement with farm decision making which is being tested nationally and internationally.