| 几种包膜缓控释肥粒养分释放特征的研究 |
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| 引用本文： | SUI Xiao-hui,韩晓日,GAO Ming,唐亮,CHEN Lu,宁晓韦.几种包膜缓控释肥粒养分释放特征的研究[J].土壤通报,2008,39(4). |
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| 作者姓名： | SUI Xiao-hui 韩晓日 GAO Ming 唐亮 CHEN Lu 宁晓韦 |
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| 基金项目： | 辽宁省自然科学基金
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辽宁省科技攻关项目 |
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| 摘 要： | 采用水浸泡法对国内外4种包膜控释肥料的养分释放特性进行了系统的研究。结果表明,4种缓控释肥料的初期溶出率均小于12%,微分溶出率在0.4%～1.5%之间,这符合国际上公认的缓/控释肥的评价标准,初期溶出率小于15%、微分溶出率在0.25%～2.5%之间。采用水浸泡法测定包膜控释肥料养分释放特征,简便快速,检测时间短,重复次数少,养分浓度变化直接反映出包膜控释肥料的释放速率特性,还可以定量的测定其供肥性能,控释肥料有控制养分释放、延长供应时间的作用;其中腐殖酸和炭基有利于提高肥料颗粒的水稳定性,减缓养分的释放速率。
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| 关 键 词： | 控释肥料 初期溶出率 微分溶出率 养分释放特征 |
Release Characteristics of Nutrients from Some Controlled Release Fertilizers |
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| SUI Xiao-hui,HAN Xiao-ri,GAO Ming,TANG Liang,CHEN Lu,NING Xiao-wei.Release Characteristics of Nutrients from Some Controlled Release Fertilizers[J].Chinese Journal of Soil Science,2008,39(4). |
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| Authors: | SUI Xiao-hui HAN Xiao-ri GAO Ming TANG Liang CHEN Lu NING Xiao-wei |
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| Abstract: | Controlled release fertilizer(CRFs) is a kind of new fertilizer to increase the utilization ratio of fertilizers.On the present condition, four kinds of controlled-release fertilizers(CRFs), coated by organic polymer and charcoal , were used in this study. The soluble properties of fertilizers tested and compared in water. Nutrient release characteristic of CRFs were discussed.The results showed that preliminary solubility was less 12%. Different solubilities were between 0.4% and 1.5%. This was consistent to the standard recommend by Committee of European Normalization. Preliminary solubility was less 15%, different solubilities were between 0.25% and 2.5%. CRFs could control nutrient release, prolong supply time of nutrient. It still proved that humic acid and charcoal were advantageous to increase water stability of fertilizers , and decelerate nutrient release rate . |
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| Keywords: | Coated fertilizer Preliminary solubility Differential solubility Nutrient release charicteristic |
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