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本文报告芦笋施用腐植酸复混肥料(芦笋专用肥)、无机复混肥料和常规肥料的肥效对比结果以及这三种肥料对防治芦笋茎枯病的作用。统计分析表明,腐植酸复混肥料比无机复混肥料和常规肥料,对芦笋产量、防病效果均有显著差异。指出腐植酸复混肥在防治芦笋茎枯病和发展芦笋生产上是一种很有前途的肥料品种。 相似文献
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腐植酸钾在农业应用上具有良好的效果,而用碱性的腐植酸钾生产复混肥料时,腐植酸易被钝化而失去活性。介绍一种以小颗粒复混肥料为母粒,采用料浆涂布法将腐植酸钾均匀涂裹于复混肥料的新型肥料生产技术;与内添加腐植酸钾的复混肥产品理化数据进行对比分析。结果表明,该技术较好地解决了腐植酸钝化问题,产品具有缓释性,pH接近中性,可用于改善土壤pH值。 相似文献
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以进口复肥作为对照,采用腐植酸复混肥进行的田间试验结果表明,腐植酸复混肥增产增效明显。研究其作用原因,腐植酸复混肥有利于缩短栽后缓苗期、促进黄瓜早发、协调营养生长和生殖生长。 相似文献
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介绍以鸡西褐煤为原料生产氮、磷、钾腐植酸复混肥的生产工艺及主要设备。该肥料能提高肥料的利用率、改良土壤,利于作物生长,是一种有发展前途的无机-有机复混肥料。 相似文献
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腐植酸在农业上的科学合理应用及腐植酸产品开发与生产,是我国发展有机一无机复混肥料切实可行的途径。实践表明,腐植酸生产的复合肥在提高化肥利用率,改良土壤,节约资源,增加作物的抗逆性能和改善农产品质方面的作用逐步受到人们重视,现已得到了市场的广泛认可。 相似文献
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以进口复肥作为对照,采用腐植酸复混肥进行的田间试验结果表明,腐植酸复混肥增产增效明显。研究其作用原因,腐植酸复混肥有利于缩短栽后缓苗期、促进黄瓜早发、协调营养生长和生殖生长。 相似文献
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Dinesh Singh J. K. Gehlawat Musti S. Rao 《Journal of chemical technology and biotechnology (Oxford, Oxfordshire : 1986)》1990,47(2):127-136
Oslefins and diolefins are important intermediates in the petrochemical industry and the future promises a further substantial increase in demand. While several catalysts have been formulated in the past for the abstraction of hydrogen from butenes and propylene, these catalysts are inefficient in the abstraction of first hydrogen from butane. Bismuth molybdates (β and γ-phases) containing iron oxide and supported on alumina are used as catalysts in the present investigation on the oxidative dehydrogenation of n-butane. Effects of catalyst content, temperature and oxygen: n-butane ratio on conversion and selectivity to butadiene and (C4H8 + C4H6) are studied in the following ranges of experimental conditions: β-bismuth molybdate/100 mol support I(K), 3–9; γ-bismuth molybdate/100 mol support I(K), 5-20; temperature, 400–500°C; O2: butane ratio, 0.6:1.7. 相似文献
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考登钢作为一种高耐候结构钢,广泛应用于各个领域。在火力发电方面,考登钢主要应用在工作环境比较恶劣的烟气加热器和空气预热器中。考登钢表面涂搪的目的就是进一步提高其耐腐蚀性能,延长使用寿命。为了提高考登钢元件的使用寿命,对考登钢表面涂搪瓷的可行性、密着性能、瓷釉、工艺控制、质量保证等方面进行了研究。 相似文献
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A viscometer used to measure the viscosity of 10 μl of a liquid, must be miniaturized down, and the liquid velocity gradient in the channel used to determine the viscosity coefficient. Two major factors that affect the liquid velocity are the mechanical forces exerted by the mechanical motors and electromagnetic forces. In this study, electrowetting on dielectric (EWOD) is adopted to drive liquids. Variously sized electrodes on a chip, and two shapes of channel are employed to measure the velocity gradient to determine the viscosity coefficient. The device is fabricated by microelectromechanical system (MEMS) technology. The dielectric layer used in EWOD has a high dielectric constant, BST (Ba0.7Sr0.3TiO3), to reduce the required applied voltage; its surface is coated with hydrophobic polymer, polytetrafluoro-ethylene (PTFE, Teflon® AF DuPont). Experimental results demonstrate that liquids can be pulled at 660 μm/s in linear channels by applying a voltage of 15 V. 相似文献
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In reexamining medium effects on photochemical reactions, we have emphasized those on unequilibrated excited species such as the Franck-Condon species. Despite recent advances in femtochemistry, such a discussion in molecular photochemistry is uncommon, and the problem remains challenging on account of the extremely short-lived excited species. However, in such cases, a small perturbation resulting from, for example, weak guest-host interactions could turn into a determining factor in dictating the course of a photochemical channel of deactivation. Examples of medium-directed diabatic processes have been examined with this idea in mind. A modified view on rhodopsin photoisomerization is presented along with the consideration that confinement does not necessarily lead to inhibition of reactions of the trapped substrate. 相似文献
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研究了温度和pH值对漆酶酶活以及漆酶处理纤维压制纤维板性能的影响。结果表明,pH较低、温度较高时漆酶酶活较高,压制的纤维板强度性能较好。但温度太高(60~80℃),延长加热时间,漆酶稳定性变差,酶活明显降低,压制纤维板的强度下降。 相似文献
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探讨了株化集团在企业管理及改革等方面的经验。该公司为适应市场经济的变革制订了科学的发展规划、思路和目标;确定了目标管理实施方案和各项制度;强化销售工作和质量管理,加大科技投入,加强科技创新活动;理顺各种关系,做好各项有关工作,使企业的经济效益和对社会的贡献逐年增大。 相似文献