Experiment on Seedling Cultivation on Mulberry Sawdust

In March 2020, seedlings of Cinnamomum camphora, Phoebe zhennan and Camellia oleifera were planted on matrix of different formulas of mulberry sawdust fermentation, coconut chaff and perlite, namely P1 ( mulberry sawdust fermentation: coconut chaff: perlite=8:1:1, volume ratio, the same below), P2 (mulberry sawdust fermentation: coconut chaff: perlite=6:3:1), P3 (mulberry sawdust fermentation: coconut chaff: perlite=4:5:1), P4 (mulberry sawdust fermentation: coconut chaff: perlite=2:7:1), and the local soil (yellow soil) was used as the control. The results showed that 4 species seedlings on matrix with 4 formulas had evident better effect of height, ground diameter, aboveground biomass, root biomass, root surperficial area, total root length and root tip number than those of CK, as well as root vigor and net photosynthetic rate. There were significant differences in the growth of three species seedlings on different matrix. Seedlings on P3 and P4 had better growth, higher root vigor and net photosynthetic rate. Root surperficial area, total root length, root tip number, root biomass and root vigor had significantly positive relation with aboveground growth (height, ground diameter and aboveground biomass) and net photosynthetic rate. The experiment resulted that P3 had the best effect.