Study on the Effect of Different Arrangement Densities on the Growth of Chinese Fir Container Seedlings
In December 2022,a comparative test was conducted on the growth of Cunninghamia lanceo-lata(Lamb.)Hook.seedlings grown in containers with different arrangement densities of 40 hole seed-lings(20 seedlings under treatment A,23 seedlings under treatment B,24 seedlings under treatment C)and the control(40 seedlings under treatment D).The results show that:the seedling height growth of treatment A,B and C was 9.5%,15.6%and 20.3%lower than that of treatment D(CK),respec-tively.There was no significant difference in seedling height among the four treatments(P>0.05);The ground diameter growth of treatment A,B and C was 15.2%,15.2%and 9.1%higher than that of treatment D(CK),respectively,The ground diameter of 4 treatments had significant difference(P<0.05);The biomass of treatment A and C increased by 17.4%and 6.7%respectively compared with that of treatment D(CK).The biomass of the four treatments had no significant difference(P>0.05);The height diameter ratio and root shoot ratio of treatment A,B and C were better than those of treatment D(CK);The seedling quality index(QI)values of treatment A,C and B were 44.4%,36.7%and 18.7%higher than those of treatment D(CK),respectively.
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