Adopting model 220B BOD quick analyzer the writers carry out determination of BOD in standard sample,surface water,domestic sewage and industrial waste water and go on contrasting analyzing with five-days biochemistry culture method.

To plantlet regeneration,different growth regulator levels played important roles in rooting culture.

Taking Phalaenopsis s tube seedlings as the test materials,this paper researches on the successive transfer culture medium and rooting culture medium,introduces the test materials and test methods,analyzes on the test results,and through the comparison of the two tests,draws the conclusion that in Phalaenopsis s successive transfer culture the No.

The effects of various factors including different selecting period and treatment of material, browning control, concentration of Non-organic, phytohormone and light on adventitious bud induction, multiplication and differentiation, rooting culture of Xinli No.