Study on the Selection of Light Substrate of Machilus thunbergii Based on Orthogonal Design

The orthogonal experiment was carried out with four materials of peat, perlite, rice husk, and compost as the matrix component. The height relative growth, diameter growth, height/diameter ratio, dry weight per plant of Machilus thunbergii were determined under different treatments. The results showed that formula P6 (peat: perlite: rice husk: compost=1:0.4:0.2:0.3) had the best growth effect, and the formula (peat: perlite: rice Shell: compost=0.7:0.4:0.2:0.2) selected by extreme value analysis and cost accounting was the most suitable for cultivating Machilus thunbergii seedlings.