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通过田间试验对微量元素水溶肥料在苹果上施用的增产效果进行验证。结果表明:苹果施用微量元素水溶肥料比常规施肥增产111.4 kg/667 m~2,增产率为5.61%;比清水处理增产103.2 kg/667 m~2,增产率为5.17%。 相似文献
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通过对腐殖酸水溶肥上的实验结果标明：番茄在常规施肥的基础上喷施腐殖酸水溶肥料,比在常规施肥的基础上喷施等量清水667m^2增产304kg,增产率6.37%,增产效果显著。 相似文献
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采用对比试验的方法,通过田间小区试验探讨中量元素水溶肥在番茄上的应用效果。试验结果表明:中量元素水溶肥能明显改善番茄植株的生育性状,表现为叶色浓绿、叶片增厚、茎粗增加、果型大小均匀;产量达4942.5kg/667㎡,比当地常规施肥增产313.6 kg/667㎡,增产率6.8%,差异达到极显著水平。 相似文献
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大量元素水溶肥对黄瓜增产效果初探 总被引：1，自引：0，他引：1
为摸清大量元素水溶肥在黄瓜上的肥效,采用对比试验方法,研究大量元素水溶肥对黄瓜生长发育及产量的影响。结果表明:喷施大量元素水溶肥料使黄瓜增产明显,增产262 kg/667 m~2,增产幅度达7.1%。 相似文献
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为摸清含腐植酸水溶肥料在番茄上的肥效,采用对比试验的方法,探讨其对番茄生育性状及产量的影响。田间试验结果表明:比常规施肥相比,喷施含腐植酸水溶肥料能明显改善番茄的生育性状;增产效果明显,增产幅度为5.2%和14.6%,。 相似文献
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为验证氨基酸叶面水溶肥在小白菜生产中的应用效果,采用田间对比试验的方法,研究战氏氨基酸水溶肥对小白菜生长发育及产量的影响。结果表明:施用战氏氨基酸水溶肥可使小白菜增产114 kg/667 m2,增产率为5.2%,增加收益321元/667 m2。 相似文献
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本文以樱桃番茄为研究对象,结合樱桃番茄对于水溶肥料氮素的吸收情况,分析了氨基酸发酵尾液对于吸收情况的影响,进而达到通过水溶肥料基于降低肥料使用量目的,并有效促进我国樱桃番茄产量的提高。 相似文献
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通过田间试验,对中量元素水溶肥在苹果上施用的增产效果进行验证。试验表明:施用中量元素水溶肥5 kg比常规施肥苹果增产172.3 kg/667 m^2,增产率为6.7%;施用中量元素水溶肥10 kg,比清水处理苹果增产234.6 kg/667 m^2,增产率为9.2%。 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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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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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