Screening experiment on excellent clones of hybrid Liriodendron Sino-americanum cuttings
8 excellent clones of annual hybrid Liriodendron Sino-americanum,including Min L.Sino-americanum No.5 were selected,their afforestation survival rate,tree height,and breast height diameter were compared with ordinary L.Sino-americanum cuttings and 3-generation container seedlings of Chinese fir as controls.The results showed that the survival rate of ordinary L.Sino-americanum cuttings was 91.4%,the survival rate of Chinese fir 3-generation container was 92.7%,the survival rate of annual hybrid L.Sino-americanum cuttings was 92.5%,with no statistically significant difference compared to the control group(P>0.05).The average tree height and diameter at breast height of the excellent clone of annual hybrid L.Sino-americanum were 2.8 m and 3.1 cm,respectively.The differences in tree height and diameter at breast height were statistically significant(P<0.05)compared to the Chinese fir 3-generation container and ordinary L.Sino-americanum;Among the 8 excellent clones,varieties Min L.Sino-americanum No.5,Min L.Sino-americanum No.6,and Min L.Sino-americanum No.9 were selected to had better growth conditions.The research results provided a reference for the promotion and application of excellent clones of hybrid L.Sino-americanum.
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