Growth Performance of 13 Provenances/Families of Tectona grandis
[Objective]In order to select more good varieties with wide adaptability for Tectona grandis,[Method]The experimental plantation was established with 13 provenances/families collected from Jian-fengling and other places in Hainan province.Tree height and diameter at breast height(DBH)were meas-ured at 5,10 and 37 years old.ANOVA analysis and repeatability assessment were performed to select superior provenances/families.Partial correlation analysis was used to reveal the correlation between tree growth and geographical and climatic factors.[Result]①Significant differences among provenances/famil-ies were found at 37 years old for survival rate,tree height,DBH and individual volume.The variation ranges were 68.81%～94.29%,11.72～16.03 m,11.33～17.92 cm,0.084 4～0.329 1 m3,respectively.②The repeatability of tree height,DBH and individual volume were 0.607 7,0.513 1 and 0.634 4,respectively.③The survival rate and tree height were not significantly correlated with geographic coordinates and climate factors;while DBH and individual volume were significantly positively correlated with elevation(r=0.938**,r=0.868**)and mean annual temperature(r=0.914**,r=0.844**),and negatively correlated with longitude(r=-0.913**,r=-0.735*)and distance(r=-0.923**,r=-0.832**).④The results of cluster analysis indicated that provenance/family 7514 performed the best on the survival rate,tree height,DBH and individual volume,while 8440 performed the worst,and followed by 75129 at the 37 years old.[Conclusion]There are significant differences among provenances/families for the survival rate,tree height,DBH and individu-al volume.Both tree height and individual volume present a relatively high repeatability.For the introduc-tion of teak,it is advisable to choose a source/family with similar annual temperatures and close distances to obtain better genetic performance.For the local area of Pingxiang,source/family 7514 is suitable for widespread planting.
万方数据
维普
