植物生物量的动态模型
式中，
，并且A(T) 和Af(T)是群落中植物占据的资源的测量值，它对于T年龄段植物的自由生长是十分必要的; T是植物的年龄; B是植物的实际生物量; Bf(T) 是自由生长植物的潜在生物量。平衡
的费用的生物量函数来描述为
，0<k<1,并且函数f1(x)有下面的属性:当0<x<1时，f1(0)=0，f1(1)=1,0<f1(x)<1。
参考文献
V.V.Galitsky:植物群落的动态二维模型。EcologicalModelling, 1990, 50
Biological retention technology mainly through the matrix filtration, adsorption and microbial action to purify the infiltration of runoff rainwater. Because it can temporarily store the rain and then slowly into the surrounding soil, therefore, can play to reduce the surface rainwater peak flow, reduce runoff pollution and so on. Biological retention technology can include many forms, the more commonly used biological retention pool, concave green space, ecological grass ditch, plant buffer zone, rain garden and ecological wetlands. It can also include rainwater reuse facilities, soil improvement and so on.
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