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为提高基质肥料的缓释性能,该文选用10种有机和无机基质制备基质肥料,通过砂柱间歇淋洗的方法研究了基质肥料的氮素释放规律,并根据Logistic方程的参数和氮素释放拐点的UPGMA聚类分析评价了10种基质的缓释效果, 结果表明:基质肥料氮素累积释放率随时间的动态变化可用一级动力学方程、Elovich方程、抛物线扩散方程和Logistic 方程表征,其中以Logistic方程拟合效果最好,这说明定量描述氮素养分释放规律的方程中以Logistic方程评价更具有实效性,而有机基质中氧化淀粉和木质素的缓释效果较好,无机基质中膨润土的缓释效果最好。
In order to improve the slow release performance of substrate fertilizers, 10 kinds of organic and inorganic substrates were used to prepare substrate fertilizers. The nitrogen release law of substrate fertilizers was studied by sand column intermittent rinsing. According to Logistic equation parameters and nitrogen release The UPGMA cluster analysis of inflection points evaluated the sustained-release effect of 10 kinds of substrates. The results showed that the dynamic change of nitrogen release rate of substrate fertilizers with time can be characterized by first-order kinetic equation, Elovich equation, parabolic diffusion equation and Logistic equation Logistic equation fitted best, which shows that the quantitative description of the law of release of nitrogen in the equation by Logistic equation evaluation more practical, and the organic matrix oxide starch and lignin release better effect, inorganic matrix bentonite The slow release of the best.