共查询到19条相似文献,搜索用时 62 毫秒
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以氯化钾和硫酸铵为原料,在滤液中加入乙醇合成硫酸钾,提高了硫酸钾的收率,并将硫酸钾与锌、锰、铜、铁等微肥与表面活性剂复配,制得高效的叶面肥。 相似文献
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以氯化钾和硫酸铵为原料,在滤液中加入乙醇合成硫酸钾,提高了硫酸钾的收率。并将硫酸钾与锌、锰、铜、铁等微肥与表面活性剂复配,制得高效的叶面肥。 相似文献
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在江苏泰兴市高沙土地区进行了银杏喷施NFC叶面肥的试验研究。试验结果表明: 1、喷施NFC叶面肥对银杏幼苗生长增量可提高12.25%~25.69%,对初果树主枝增长可提高8.54%~24.42%,表现出明显促进银杏营养生长的作用。 2、喷施NFC叶面肥增加银杏的白果单粒重0.025克~0.295克,提高出核率0.3%~2.06%,1~2级果率1.56%~18.16%,表现出良好的促进银杏品质和经济收益的作用。 3、喷施NFC叶面肥的浓度以50mg·L~(-1)为好,喷施时间以银杏营养生长和生殖生长旺盛期的5月至6月为佳。 4、生长型银杏以NFC_2型较好,而NFC_4,型则由于低成本可广泛应用。 相似文献
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通过对复合叶面肥的应用现状及其在使用过程中的存在问题的综述,归纳了复合叶面肥中常用的螫合剂,并对复合叶面肥研究的发展方向和应用前景作了展望。 相似文献
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Fenton氧化法的类型及特点 总被引:15,自引:1,他引:15
Fenton氧化法是一种有效的高级氧化法.在处理难降解有机污染物时具有独特的优势,是一种很有应用前景的废水处理技术。该文概述了Fenton氧化法的类型和特点,并对各类型在废水处理中应用的优、缺点及发展趋势作了阐述。 相似文献
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针对陇东侏罗系油藏的开发现状,详细分析了陇东侏罗系油藏的地质特征,根据油藏地质特征将侏罗系油藏分为厚层块状油藏、连片层状油藏、边底水油藏以及特低渗透油藏等类型;同时,详细分析了不同类型油藏的开发历史与动态资料,总结了不同类型油藏在开发过程所表现的特征,提出了不同类型油藏剩余油分布的有利区域,对更好地开发同类型油藏具有一定的指导意义。 相似文献
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分析综述了已经实现工业化生产的各类煤气化炉的特点,煤种适应性,各自的煤气质量和应用领域,工业化放大的不同特点,气化效率的不同,对环境的不同影响等。可为计划上马煤化工项目的用户选择气化技术提供参考。 相似文献
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Yousif M. A. Idris Safaa A. Hassan Abdalbasit A. Mariod 《Journal of the American Oil Chemists' Society》2013,90(7):989-998
The physicochemical characteristics and aflatoxin levels of two types of sesame oil [Walad (W) and Normal (N)] were determined. A total of 104 sesame oil samples were collected during two seasons (I and II) from traditional mills in five states of Sudan. Levels of aflatoxin B1, B2, G1, and G2 were determined using HPLC. The physicochemical characteristics of W and N samples were significantly (P ≤ 0.05) different: samples of W and N from the five states had fluctuations in physicochemical characteristics in the two seasons. The highest percentage of contamination (recorded in Khartoum followed by Kordofan state) by aflatoxin B1 during season II occurred in normal sesame oil which was 80.77 %, followed by Walad sesame oil which was 76.92 %. These percentages of contamination in season I were lower than 59.26 % for normal sesame oil and lower than 52.0 % for Walad sesame oil in season II. Aflatoxin B2 contamination recorded the highest incidence in season II (3 out of 26 samples, 11.54 %) of normal sesame oil, followed by Walad sesame oil (2 out of 26 samples, 7.69 %). These percentages were lower than the 7.40 and 4.0 % of normal and Walad sesame oils in season I, respectively. Aflatoxin B1 and B2 levels in sesame oil ranged from 0.5 to 9.8 and 0.5 to 1.3 μg/kg, respectively. 相似文献