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进入三月份以来,我国大部分地区开始了紧张繁忙的春耕备耕季节,部分地区的拖拉机市场也进入了销售的高潮。从笔者了解的市场情况来看,当前拖拉机市场销售呈现以下特点: 相似文献
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进入2011年1月份,我国主要拖拉机生产企业销售各种型号的大中型拖拉机3.16万台,同比增长5.09%;其中国内市场销售2.92万台,同比增长2.26%;出口市场销售2286台,增幅达到65.29%。1月份的市场表现释放出2011年大中型 相似文献
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<正>进入今年以来,我国农机市场遭遇多年未有的寒流,拖拉机市场遭遇滑铁卢,小麦、水稻收获机市场先后进入下降通道,插秧机市场步履蹒跚,播种机市场波澜不惊,与之形成鲜明对比的玉米收获机市场却逆势上扬。进入今年以来,我国玉米收获机市场在农机补贴的刺激下,继续保持强劲的增长势头。市场调查显示,前8个月,我国累计销售各 相似文献
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据农机工业协会企业管理分会提供的拖拉机重点企业行表数据显示,今年1~7月,70马力以上大轮拖行业销售86879台,同比下降10.4%;25~70马力中轮拖行业销售160206台,同比下降4.8%。1~7月;小拖行业销售202556台,同比下降5.9%。除小轮拖下滑已成近年来习惯性动作外,大中型拖拉机销量下滑是近年来的"突发事件"。因此,一种拖拉机行业已经进入盘整期、拖拉机市场面临"拐点"的观点甚嚣尘上,这种悲观论调已经或多或少的影响了业内企业家对未来市场的信心和判断。 相似文献
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今年上半年的农机市场总的说有两个显著的表现:一季度增长势头强劲,二季度趋于平淡"大中型拖拉机一枝独秀,联合收割机下滑严重,其他表现平平。今年上半年农机市场运行态势总体评价可以用一季度火爆,二季度平淡来概括。1—5月重点农机销售企业销售情况抽样调查显示:1—3月农机销售额比去年同期增长51%;4—5月销售比去年同期增长10%。今年农机市场启动时间比较早,旺季提前。市场启动后,大部分农机产品在全国大部分地区进入热销阶段。但市场的迅速升温持续时间比较短,到3月底4月初已近尾声。从地区市场结构上看也很不平衡。市场热销首先从东北… 相似文献
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《Journal of Agricultural Engineering Research》1998,69(3):249-254
A model to represent the discolouration of dried powder of carrots as a function of temperature was developed. Two types of carrots, Asian and European, containing large amount of lycopene and β-carotene, respectively, were tested. The dried powder was stored under an atmosphere with O2and at three different temperatures, 5,20 and 35°C. The surface colour of the powder was monitored during storage by a Hunter colour ratioa/b. In the proposed model, the rate of oxidation was assumed to be represented by the product of the fraction of concentration of oxidized pigment at arbitrary time and a specific rate of oxidation of pigment. The rate parameters in the proposed model were calculated by fitting the experimental data with smooth curves by trial and error at the end of the induction period but before discolouration took place. The frequency constant and activation energy, expressing the temperature dependence of the rate parameters, were expressed by the Arrhenius relation. The simulation results of a Hunter colour ratioa/bof dried powder at 25°C showed good agreement with the experimental data, suggesting that the proposed model was effective for the prediction of discolouration of dried powder of both types of carrot. The use of the induction period in the manner described may enable the shelf life of dried powder to be predicted. 相似文献
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The fractional outflow rate of water from the rumen, measured as the rate of disappearance of the chromium complex of ethylenediamine tetra-acetic acid, was related to a number of dietary factors. A multiple regression equation was derived which expressed fractional outflow rate as a function of the intakes of dry matter, ash, acid-detergent fibre and crude protein.The data analysed consisted of 243 observations for sheep on 59 diets, including forage, concentrate and mixed diets. The ranges covered by the data were: fractional outflow rate 0.7–3.6 day?1; dry matter intake 560–1400g/day; ash 4–30%, acid-detergent fibre 7–41%, crude protein 5–26 % of dry matter; there were no observations for sheep of less than 34 kg liveweight.The equation accounted for 56·3 % of the total variance. Between-sheep variance could not be calculated for the whole of the data but was undoubtedly substantial since, for a sixth of the data, it was known to account for 38 % of the total variance. 相似文献
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感官检验棉花的品级,这是农村常见的一种检测手段.它的一个主要特点就是存在不确定性.这是由于检验员的品级检验水平存在一定的差异,其中有很多因素制约着检验的结果.文章对影响感官检验结果的因素进行了系统的分析. 相似文献
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从灾害经济学的角度探讨了城镇供水优化调度的必要性和可能性,认为在缺水不可避免的情况下,对供水进行优化调度可以减小缺水带来的损失,产生较好的减灾效益,特别是可以大大减小严重干旱的灾害效应。并根据水资源的特性,提出了缺水损失的计算模式以及优化调度的原则和方法。 相似文献