Effects of Different Light Substrates on Container Seedling Quality of Pinus kesiyavar.langbianensis

Six kinds of light substrates,such as turfy soil,perlite,vermiculite,coconut tree branny,understorey soil of pine forest and mountain red soil were mixed with different proportions to culture the seedlings of Pinus kesiyavar.langbianensis and to find out the influences of the substrates on the quality of the seedlings.Weight of substrate,seedling survival rate and seedling height were used as indices for the selection of optimal ratios.Satisfactory results were achieved for the substrate with a proportion of lime:vermiculite:pine forest soils=4∶1∶5,by which the seedling survival rate,height,ground diameter,main root length and number of lateral root were 9.46%,6.53 cm,0.12 cm,6.42 cm and 13 higher than those of the control,and the matrix weight was 233 g lighter than the control.The proportion could be applied preferably for culturing container seedlings.Significant and negative correlation was observed between substrate weight and seedling preserving rate.

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