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在复合肥的生产过程中,用流动注射分析测定磷矿,磷石膏,磷酸中的五氧化二磷,该方法制样简单,分析速度快,结果准确。 相似文献
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Application of a rice field experimental error distribution function to nitrogen-phosphorus-potassium fertilizer response model analysis 总被引:2,自引:0,他引:2
A distribution function of rice yield deviations from the mean was developed from field experiments with 555 plots at 16 sites in Zhejiang province, China, for three years. The deviation distribution in interval of 50kg/ha appeared as a symmetrical distribution with a high peak (Mean=0.279 [kg/ha], SD=240.686 [kg/ha]). Normality test using Kolmogrove-Smirnov test between the observed cumulative distribution and the normal cumulative distribution function indicates that the observed deviation distribution is not normal. An empirical exponential cumulative distribution function was developed. The distribution function was used to remove outliers during the development of a rice yield fertilizer response model, based on data from a non-replicated NPK field experiment. 相似文献
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分析尿素溶液喷浆造粒生产复合肥工艺改进的必要性,对引进的TVA、K-T、Hydro、Incro等公司的尿基复合肥生产工艺,国内改良氨酸法,台湾改良TVA法以及国内开发的硫酸铵管式反应器工艺、转鼓氨化硫基复合肥工艺等尿基复合肥生产工艺的技术特点进行了比较,为国内现有尿液喷浆造粒或蒸汽团粒法生产复合肥的厂家技术改造提供参考. 相似文献
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A field study was conducted to investigate the effects of three fertilizer placement methods and 11 fertilizer formulations on plant survival, economics of replanting, yield, and fruit size of two rabbiteye blueberry (Vaccinium ashei Reade) cultivars Tifblue and Woodard. Fertilizer rates were either mixed with the soil under plants (before planting), sidedressed, or half-rate was placed under plants with the other half sidedressed. Fertilizers at planting caused a total of 34% Woodard and 12% Tifblue plants to die as compared to 6% for Woodard and none for Tifblue when no fertilizer was applied. Fertilizer formulas 2-1-1 and 5-10-10 oxide ratios placed under Woodard plants caused 100% mortality whereas Tifblue fertilized with oxide ratios 2-2-2 and 5-10-10 under plants reached the maximum 50% mortality. Splitting fertilizer placement under the side of the plants resulted in less Woodard plant mortality (30%) than placing all the fertilizer under plants (54%). However, plant mortality for the side/under group was not different than sidedressing all fertilizer (23%). A planted hectare in this experiment consisted of 1852 Tifblue and 926 Woodard plants, providing one Woodard plant to pollinate two Tifblue plants. Based on the results obtained, the 5-10-10 fertilizer placed under plants would be expected to cause half the Tifblue (926 plants) and all the Woodard (926 plants) to be replanted. Plant costs alone was estimated to be $2315 with additional replanting costs of $93 for Tifblue and much higher for Woodard. Sidedressing 5-10-10 fertilizer eight weeks after planting would have prevented plant mortality. Placement of various fertilizers under Woodard or Tifblue plants resulted in a significant increase in plant mortality as compared to side placement of fertilizers. Yield loss due to plant mortality increased linearly with the N level of the fertilizers (ranging from 0 to 2) for both cultivars. Woodard fruit size was not affected by fertilizer placement but placing fertilizers under Tifblue plants produced smaller yields with larger fruit than sidedressed plants. Blueberry plants in a virgin acidic soil may experience no reduction in yield if fertilization is completely eliminated. 相似文献
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硫基氮磷钾高浓度复合肥生产工艺的研究 总被引:2,自引:0,他引:2
对硫基氮磷钾高浓度复合肥生产工艺进行了研究,介绍了硫酸钾的转化率、料浆性质和产品性能。研究表明,硫酸钾的转化率是影响产品中氯根含量的主要因素,在反应温度110-120℃,反应时间2h,硫酸过量5%-10%的条件下,可以生产出氯根含量低于2%的低氯氮磷钾高浓度复合肥。 相似文献
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对硝酸-硫酸混酸法硝酸磷肥生产装置进行改造,添加硫酸钾生产三元硝基复合肥。介绍三元硝基复合肥的生产工艺流程、装置特点。生产的三元复合肥料产品水溶率高,深受用户好评,提高了公司市场竞争力。 相似文献
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