【摘要】 以大蓬蔬菜用生产过程中土地喷灌问题为背景,讨论如何设计喷灌系统的喷头间的距离才能使土地受水尽可能均匀.首先,在模型假设的基础上,建立了该实际问题的抽象数学模型,用微积分方法将其抽象模型具体化.通过模型求解得到如下结果:（1）当喷灌系统的喷头间距为d=203^1/2时,土地中各处受水最均匀;（2）按给定问题的要求设计的灌溉系统,不可能选取喷头间的间距d使得土地各处受水完全均匀.更多还原

【Abstract】 We discuss how to design a gap between sprayers of a spray system such that the quantity of water is relatively even for every point in the land. An abstract mathematical model is built for the given question and is specified by the method of calulus. We solve this model and the followings are obtained: （1）The land is watered most evenly when the distance d = 203^1/2 between neighbouring sprayers; （2）It is not possible that the quantity of sprayed water is absolute equal at every point of the field for the given question.更多还原