沸石复混肥氮素缓释效应的评价

以石英砂柱淋洗评价肥料氮素缓释效应的方法,在实验室条件下对沸石复混肥氮素的淋洗特性进行了研究。用双曲线方程对沸石复混肥石英砂柱氮素淋洗曲线进行拟合以评价其缓释特性,并与盆栽条件下油菜生长前期土壤速效氮素供应和植株苗期对氮素养分的吸收状况进行相关分析。该方法能对掺混型(包裹型)缓释肥料的缓释特性进行快速的定性和定量评价,为这类缓释肥料的研制和施用提供一定的帮助。

Evaluation of slow-release effect of nitrogen in zeolite-based compound fertilizer

The nitrogen leaching properties of ZBF in quartz sand column were studied in laboratory, a hyperbold equation was attained to simulate the accumulated nitrogen dissolving percentage and to evaluate the slow release effects. At the same time, the pot trial of rape by application of ZBF was conducted, the available nitrogen of soil in early stage of rape's growth and the nitrogen absorption in rape's seedling stage were also investigated, they are correlative to the slow release effects obtained in laboratory to some extend. It shows a prompt method in assessing the slow release effects of blended compound fertilizer qualitatively and quantitatively, it is also helpful in guiding the manufacture and application of this kind of slowrelease fertilizer.