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浅析甘蔗收获机械推广应用存在的问题与对策 总被引:6,自引:0,他引:6
本文从国外甘蔗收获机械应用的情况,结合我国国情分析了国内甘蔗收获机械推广应用存在的土地规划、种植行距、机型选择、甘蔗验收条件等几个方面存在的问题和对策。本文最后还对我国甘蔗收获机械应用前景进行了探讨和分析。 相似文献
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计算机视觉技术与品质检测自动化 总被引:4,自引:0,他引:4
随着计算机硬件成本的下降和速度的提高,计算机视觉技术在农产品品质自动检测领域的应用前景已经越来越广阔。为此,从农产品尺寸与面积检测、形状检测和颜色检测等3个方面综述了国外在利用计算机视觉技术进行农产品品质自动检测方面的研究进展,并指出了目前尚需解决的难点问题。 相似文献
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本文就内蒙古呼伦贝尔市发展畜牧业经济所面临的“草畜矛盾”问题,开展了推广应用农作物秸秆饲料机械化加工技术的研究。从农作物秸秆资源丰富的优势、促进草原生态保护进程、推进畜牧业“舍饲圈养,科学管理”的步伐和推动农牧民增收增效几个方面进行了重要性及可行性分析;结合农牧民经济能力和技术水平状况,提出了三种可行的农作物秸秆饲料机械化加工技术推广应用的形式。并结合国内外农作物秸秆利用情况以及呼伦贝尔市饲草料市场需求能力、开发农作物秸秆饲料加工利用的经济、社会、生态效益方面进行全面分析。指出在呼伦贝尔市推广应用农作物秸秆饲料机械化加工技术的光明前景。 相似文献
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文章简述了农业秸秆成型技术在国内外和贵州的发展及其应用现状,简要说明了推广应用农业秸秆成型技术对促进贵州农业循环经济发展的重要意义,并从社会效益、经济效益及市场预测三个方面,浅析了农业秸秆成型技术在贵州的应用前景 相似文献
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通过对玉米收获机在生产实践中出现的问题进行深入研究分析,认为影响玉米联合收获机推广应用的主要原因在机身本身,从地区适应性、劳动重复性、用户适用性和使用可靠性等4方面提出技术改进意见。 相似文献
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介绍了秸秆还田技术的应用现状及优点,对实施秸秆还田的社会效益、经济效益和生态效益及其应用前景进行了分析,指出了目前应用秸秆还田技术存在的问题,提出了推广应用机械化秸秆还田技术的具体措施。 相似文献
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临沂市推广小麦秸秆机械还田技术的实践与思考 总被引:1,自引:0,他引:1
沈娟 《农业装备与车辆工程》2010,(10)
2010年临沂市大力推广应用小麦秸秆还田技术,有力地促进了秸秆禁烧工作,为保护环境,提高粮食产量,发展现代生态农业摸索了一条科学可行的道路。在该技术的推广应用中也发现了一些问题,机具本身存在一定的不足,农机与农艺的结合不到位,行政干预措施以及社会认识等方面也存在一些不足。应当通过改进完善机具,提高农机与农艺结合水平,制定优惠政策,加强行政干预和宣传力度,提高社会认识等几方面来解决这些问题。 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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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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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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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