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Test Analysis on the Soilless Culture Substrates of Dendranthema lavandulifolium

WANG Lin-lin et al (National Research Center of Flower Engineering Technology,College of Landscape Architecture,Beijing Forestry University,Beijing 100083)  
[Objective]The aim was to screen out the culture substrate suitable for the growth of Dendranthema lavandulifolium.[Method] With river sand as CK,4 kinds of artificial culture substrates were prepared with vermiculite,perlite and peat as raw materials to study the effects of different culture substrates on the growth of sown D.lavandulifolium seedlings.[Result] The increasing speeds of plant height,true leaf number and stem diameter of D.lavandulifolium in Treatment D were significantly bigger than that in the other treatments,the D.lavandulifolium in Treatment B and C also grew relatively fast,that in Treatment A and E grew slowly and their growth vigor was bad.The longitudinal increment of D.lavandulifolium in Treatment D had extremely significant difference from that in the other treatments and the true leaf number and stem-diameter increment of D.lavandulifolium in Treatment C and D had extremely significant difference from that in Treatment A,B and E.The lateral root lengths and numbers in Treatment D and B had extremely significant difference from that in Treatment A and E.The lateral root number of Treatment D had extremely significant difference from that in the other treatments and the lateral root lengths and numbers in Treatment A and E had no significant difference.The dry and fresh weights in Treatment D had extremely significant difference from that in the other treatments and that in Treatment C had extremely significant difference from that in Treatment A,B and E.[Conclusion] The substrate vermiculite + peat(1∶1) was relatively ideal soilless culture substrate for D.lavandulifolium.
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