The Effect of Mixing Different Tree Species on the Growth of Eucalyptus Trees
This study aimed to investigate beneficial mixed planting patterns for promoting the growth of Eucalyptus gran-dis×E.urophyllax.Three native broadleaf tree species,namely,Michelia macclurei,Machilus pauhoi,and Castanopsis hystrix,were selected from Guangxi for mixing with three-year-old E.grandis×E.urophyllax.The growth of E.grandis×E.urophyllax was assessed under different mixed planting patterns.The results of this study revealed that the greatest differences in tree height,diameter at breast height,individual tree volume,and stock volume were detected when E.grandis×E.urophyllax were mixed with C.hystrix.These values were recorded as 16.80 m,14.16 cm,0.126 m3·plant-1,and 140.01 m3·hm-2,respectively.In comparison,the mixed planting patterns of E.grandis×E.urophyllax with M.macclurei and M.pauhoi yielded fewer measurements.Therefore,incorporating C.hystrix as a mixed tree species with three-year-old E.grandis×E.urophyllax can significantly enhance the growth of E.grandis×E.urophyllax and increase the volume of timber stock.This research result offers a viable reference for efficient E.grandis×E.urophyllax cultivation.
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