共查询到20条相似文献,搜索用时 78 毫秒
1.
2.
在分析浙江省油菜产业和油菜生产机械化现状的基础上,提出了促进浙江省发展油菜生产机械化的措施和建议,以期为浙江省有关部门制定发展油菜生产机械化政策、加快油菜生产机械化发展提供参考。 相似文献
3.
4.
5.
油菜生产机械化装备和配套技术研究 总被引:1,自引:0,他引:1
分析了我国油菜生产机械化的技术现状,指出了油菜机械直播、联合收获和油菜籽烘干机械化技术存在的问题,针对目前大多高产品种不能满足机械直播要求、油菜机械化收获的适应性差、适收期短、损失率大,以及油菜籽的烘干工艺、干燥机理和适用装备研究缺乏等问题,简述了加强油菜生产机械化装备与配套技术的研究必要性,提出了加快油菜生产机械化发展的对策,对于提高我国油菜生产全程机械化水平,促进油菜生产具有十分重要的意义. 相似文献
6.
油菜机械化生产关键环节农机农艺融合问题的探讨 总被引:1,自引:0,他引:1
油菜是浙江省除粮食以外种植面积最大的大田作物.长期以来,浙江省油菜生产采用精耕细作的传统方式,主要由人工进行种植、田间管理和收获.随着浙江省工业化、城镇化进程加快,以及农业劳动力快速转移,劳动力季节性短缺和生产成本上涨已成为当前制约油菜产业发展的最主要因素;因而广大农民迫切需要省工、省力、省肥、省药的实用高效轻简化栽培技术.油菜生产综合能力较强国家的经验表明:发展油菜生产机械化,对降低生产成本,增加产量和收益等都具有重要作用.因此,油菜机械化生产是浙江省乃至我国油菜生产的发展方向.油菜生产机械化技术包括种植、田间管理、收获和加工等几方面的机械化作业,其中最为关键的是机械化种植和机械化收获两个环节.近些年,油菜生产机械化问题得到各级农机管理部门的重视,对种植和收获环节所需机械装备进行了引进、试验和示范,但推广成效与预期目标存在较大差距. 相似文献
7.
我国油菜全程机械化现状与技术影响因素分析 总被引:13,自引:0,他引:13
从生产与需求、种植区域分布、品种特点和生产机械化等角度出发,概述了我国油菜生产现状,分析了油菜生产全程机械化等技术问题;根据品种特点、种植方式、收获工艺3个方面与机械化的关系,阐述了油菜全程机械化的技术影响因素,指出了推进我国油菜生产机械化的主要技术途径.通过研究分析可知:油菜全程机械化是一个复杂的系统工程,必须从品种培育、规范农艺技术、改进和开发机械装备等3方面协调地解决;必须针对各主产区品种特点、自然条件和经济条件,集成并融合单项技术,建立油菜机械化的区域技术模式和技术体系,系统地推进油菜机械化发展. 相似文献
8.
衡阳县现有耕地面积6.64万hm2(99.6万亩),油菜是仅次于水稻的第二大农作物,近几年来油菜种植面积一直稳定在3.33万hm2(50万亩)以上,是全国产油百强县之一.2007年以前,油菜生产基本采用人工移栽的传统模式,农民劳动强度大瑚菜生产比较效益低.衡阳县委县政府为稳定和发展油菜生产,巩固油料生产大县地位,把发展油菜生产机械化列入重要议事日程,2008年争取到农业部"油菜生产机械化示范项目".通过项目拉动、示范带动,衡阳县油菜生产机械化发展取得了一定成效. 相似文献
9.
10.
油菜是湖南省衡阳县仅次于水稻的第二大作物。为稳定和发展油菜生产,提高生产效益,近年来,该县把发展油菜生产机械化列入重要议事日程。2008年,农业部油菜生产机械化示范项目在衡阳落户,通过项目实施,推进了全县油菜生产机械化。 相似文献
11.
12.
13.
14.
15.
《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
16.
17.
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
18.
19.
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
20.
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