The physical and chemical properties of matrix are the key factors for the somaclone took root trans-planting survival .Through the ratio of different proportions of various matrix ,determination of matriz physical and chemical properties of Dendrobium of f icinale Kimura et Migo and survey the somaclone indices such as survival rate were studied .The results showed that the Dendrobium of f icinale Kimura et Migo somaclone took root in the formula of the matrix was suitable in the physical and chemical properties of the formula for lum-ber :peat :pearlite was 1 :2:1 ,its bulk density was 0 .11 g·cm-3 ,60 .58% of the total porosity and capillary po-rosity were 14 .25% and 71 .56% ,the capillary porosity size void ratio was 1 :1 .3 .Matrix of NPK nutrient con-tent were 0 .059 ,0 .016 and 0 .153 g·kg-1 ,pH value was 6 .8 ,the conductivity was 0 .90 Ec .The survival rate , rooting and growth of Dendrobium of ficinale Kimura et Migo somaclone grew in sawing wood ,peat ,perlite of 1:2:1 matrix which were significantly higher than other matrix formula .It was more suitable for the Dendrobi-um of f icinale Kimura et Migo somaclone growth of cultivation matrix .%基质理化性质是影响组培苗移栽时生根成活的关键因素 ,通过不同基质种类的不同比例配比 ,对铁皮石斛培养基质的理化性质测定和调查组培苗成活率等指标进行研究.结果表明 :铁皮石斛组培苗在各配方的生根基质中较适宜的理化性质配方为锯木:泥炭:珍珠岩=1:2:1 ,其容重0 .11 g·cm-3 ,总孔隙度60 .58% ,毛管孔隙度14 .25% ,非毛管孔隙度71 .56% ,大小孔隙比1:1 .3.基质中的氮磷钾养分含量分别为0 .059、0 .016、0 .153 g·kg-1 ,pH6 .8 ,电导率为0 .90 Ec.铁皮石斛在不同基质栽培中的成活率和生根、生长有显著影响 ,栽培于锯木:泥炭:珍珠岩=1:2:1基质中的组培苗的成活率、生根情况和生长情况均显著高于其它基质配方 ,是一种比较适合铁皮石斛组培苗生长的栽培基质.
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