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农业系统是由生物与生物、生物与环境,在物质循环和能量变换过程中所建立起来的互相依存、互相制约的一个多层次、多序列、多结构的,具有生产功能的有机整体。但是农业系统中的物质循环和能量变换的信息都是不完全的。因此,农业系统是灰色系统。以种植业为例,田间生长的作物是一个十分复杂的物理学——化学——生物学的动力系统。在该系统中
The agricultural system is a multi-level, multi-sequence, multi-structure and productive organic whole which is established by the biological and biological, biological and environmental, established in the process of material circulation and energy transformation. But the information of material circulation and energy transformation in agricultural system is incomplete. Therefore, the agricultural system is a gray system. Take the farming industry as an example. The crop grown in the field is a very complex physics-chemical-biological power system. In this system