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<正>国家统计局公布的全国夏粮生产数据显示,2014年全国夏粮总产量13 659.6万t,比2013年增产474.8万t,增长3.6%,再创历史新高。2014年以来,各级政府严格落实"谷物基本自给,口粮绝对安全"的国家粮食安全战略,采取各种措施,紧抓粮食生产不放松,夏粮播种面积保持了基本稳定。2014年全国夏粮播种面积为2 760.36万hm2,比2013年增加1.55万hm2, 相似文献
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夏粮丰产丰收能否及时收获入库,影响着全年粮食生产和农牧民增收。下面就柴油涨价,农机人如何确保夏粮顺利机收,尽可能减轻农牧民负担、减少机收作业成本,及时有序的在夏粮收获作业期间确保农用柴油的供应,提出几点措施供大家讨论。内蒙古自治区2006年小麦种植面积793万亩,种植 相似文献
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国家统计局公布的全国夏粮生产数据显示,2016年全国夏粮总产量13 926.0万t,比2015年减产162.1万t,减少1.2%。2016年夏粮产量虽略有减少,但仍处于历史第2高位,属于丰收年。夏粮减产主要是因为单产下降。2016年,全国夏粮播种面积2 763.24万hm~2,同比增加0.71万hm~2,增长0.03%;全国夏粮产量5 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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《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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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
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