【摘要】 根据菲克定律、改性传质双膜论、液膜寿命分布函数,建立了包膜型控释肥料养分释放的偏微分方程组。用拉普拉斯变换法求解该方程组,并将拉普拉斯变换与液膜寿命分布函数结合,得到了养分释放速率的表达式,为进一步研究提供了理论基础。更多还原

【Abstract】 The partial differential equation system of controlled release fertilizer nutrient diffuse was constructed based on Fick’s law,improved double film theorem of mass transfer and distributed film life function. The equation system was solved with Laplace transform method. Then the expression of nutrient release rate was obtained with the unification of Laplace transform and distributed film life function,which can be the theoretical basis of further research.更多还原