| 【Objective】In order to select the cultivation substrates suitable for Michelia guangdongensis seedling,
the effects of 18 kinds of substrates on the growth of the M. guangdongensis seedlings were compared to screen out the
environmental friendly substrates with better seedling growth，smaller bulk density，simple preparation and lower cost.
This study provides a scientific basis for the cultivation and application of the M. guangdongensis seedlings.【Methods】
The physicochemical properties of different substrates and the growth of M. guangdongensis seedlings were studied. The
effects of different growth rates were evaluated comprehensively by multiple comparisons of growth and pearson correlation
analysis.【Results】M. guangdongensis was treated with different substrates for 8 months. The bulk density and total
porosity of the 18 substrates were 0.85-1.44 g/cm3 and 35.93%-54.44%，respectively. The pH was 4.47-7.76，and
the organic matter content, total N content and effective P content of the substrates were 5.65-62.9 g/kg, 0.302-
2.740 g/kg, and 12.7-138.0 mg/kg，respectively. There was significant difference between the growth of seedling height and crown width，and the height and crown width were positively correlated with the SPAD value，the leaf area
and the bulk density，the cation exchange capacity CEC and the conductivity EC, and negatively correlated with the total soil
porosity and pH value. M. guangdongensis is suitable for growth in substrates with large bulk density, low pH, low organic
matter, total N and available K content.【Conclusion】 The comprehensive growth of M08 (yellow soil∶vermiculite=3∶2) and
M07 (yellow soil∶perlite=3∶2) was 10.19% higher than that of the control, and the bulk density was 9.72% lower than that of
the control. It is suggested that the two substrates mentioned above are the preferred substrates for M. guangdongensis. |
