Cutting rooting rates for T chinensis var Mairei were studied by using simplex core experimental design.Four kinds of major mediums were selected to consist of fifteen kinds of various mixture mediums.The experiments were divided into two groups which are long cutting(8cm) and short cutting(5cm).With the same experimental condition,various cutting rooting reaction in mixture mediums was observed and the mathematical models were set up.The optimized mediums for cutting rooting were chosen with the optimu...