用多扩散模型研究聚氨酯类涂层(PULC)尿素肥料中尿素的释放☆

APCBEE Procedia Pub Date : 2014-01-01 DOI:10.1016/j.apcbee.2014.03.017

Thanh H. Trinh, KuZilati KuShaari, Abdul Basit, Babar Azeem, Anis Shuib

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引用次数: 16

摘要

控释肥在防止养分流失和提高植物吸收效率方面起着重要作用。本研究采用多扩散模型模拟尿素肥料在包覆聚氨酯类涂层(PULC)后的尿素释放。该模型采用COMSOL Multiphysics软件对三种粒径的尿素颗粒进行有限元分析和二维几何分析。模拟结果与“恒释放”阶段的实验数据吻合较好。在这些模拟中，估计的标准误差(SEE)在0.00417 ~ 0.02084之间。此外，还建立了涂层厚度与释放时间和“恒释放”阶段末尿素释放率的关系。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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Use of Multi-diffusion Model to Study the Release of Urea from Urea Fertilizer Coated with Polyurethane-like Coating (PULC)

Controlled release fertilizer (CRF) play an important role in nutrient loss prevention and plant's uptake efficiency. This study uses a multi-diffusion model to simulate urea release from urea fertilizers coated with polyurethane-like coating (PULC). In this model, finite element method (FEM) and 2D geometry are applied for three sizes of urea granule using COMSOL Multiphysics software. Modeling results are in agreement with the experimental data for the “constant release” stage. Standard error of estimate (SEE) ranges from 0.00417 to 0.02084 in these simulations. Besides, relationship of coating thickness with release time and percent of urea released at the end of “constant release” stage has also been established.

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