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<正>玉米缓控释肥种肥同播机械化技术是指利用具备施肥功能的玉米播种机,将玉米种子和缓控释肥垂直间隔一定距离,一次性将种子和缓控释肥同时施入土壤的机械化技术,具有减轻劳动强度,提高化肥利用率,减轻环境污染和能源消耗的优势。 相似文献
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<正>玉米缓控释肥"种肥同播"机械化技术是指在玉米播种时,使用玉米播种施肥机,通过设置适宜的种子和肥料间距,安全有效地将种子和缓控释肥一次性播入土壤的技术。该技术可一次进地完成开沟、深施缓控释肥、播种、覆土、镇压等作业工序。一、山东缓控释肥"种肥同播"机械化技术推广情况自2012年起,省财政连续两年对缓控释肥"种 相似文献
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通过田间试验的方法,探讨脲甲醛缓控释肥在玉米上的应用效果.结果表明,高控量施肥效能改善玉米植株的生物性状,明显提高玉米产量,增加经济效益,提高投入产出比,应大面积推广应用. 相似文献
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玉米缓控释肥"种肥同播"机械化技术是指利用具备施肥功能的玉米精量播种机,通过一次进地作业,将玉米种子和专用缓控释肥上下间隔一定距离,同时施入土壤的机械化作业技术。2016年,我县推广玉米缓控释肥"种肥同播"机械化技术作业面积2.8万亩,对技术路线、技术要点和注意事项、规范操作进行了分析总结,为该技术的大范围推广使用积累了经验。 相似文献
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为掌握缓控释肥"种肥同播"机械化技术在玉米种植上的田间作业效果,研究缓控释肥"种肥同播"机械化种植技术对玉米生长发育的影响,定陶区农业机械服务中心在农机科技示范基地安排了缓控释肥"种肥同播"机械化种植玉米对比示范试验.
一、示范地点与时间
(一)示范时间:2021年6月至2021年9月.
(二)示范地点与面积:A点为马... 相似文献
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为研究新型缓控释肥料的应用模式,采用对比试验的方法,开展玉米施肥田间试验。试验结果表明:新型缓控释肥料比测土配方推荐施肥增产6.93%,经济效益增加78.03元/667 m2,氮肥利用率增加19.5个百分点;应用新型缓控释肥料,施氮量减少10%是可行的。 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