尾巨桉与灰木莲混交造林效果研究

Study on Mixed Afforestation Effect of Eucalyptus urophylla × E.grandis and Magnoliaceae glance

为探索尾巨桉与灰木莲混交造林效果,以尾巨桉与灰木莲1∶3和5∶5的比例进行行状混交,并以尾巨桉纯林为对比开展了混交造林试验。结果表明:6年生尾巨桉与灰木莲的混交林中,尾巨桉的胸径、树高和单株材积均大于尾巨桉纯林,不同林分的尾巨桉胸径、树高和单株材积均存在显著差异,灰木莲的生长量差异不大;尾巨桉与灰木莲混交林林下植物多样性更丰富;尾巨桉与灰木莲混交林土壤与尾巨桉纯林土壤相比疏松透气,养分含量高,土壤结构和肥力状况良好。初步认为尾巨桉与灰木莲1∶3比例行状混交较为合适。

In order to explore he mixed afforestation effect of Eucalyptus urophylla×E.grandis and Magnoliaceae glance,Eucalyptus urophylla×E.grandis and Magnoliaceae glance were mixed in the ratio of 1∶3 and 5∶5 of row-like model,and the mixed afforestation experiment was carried out with the Eucalyptus urophylla×E.grandis pure forest for comparison.The results showed as follows:tree DBH,height and volume of six-year Eucalyptus urophylla×E.grandis in mixed forest were more than those of pure stand of Eucalyptus urophylla×E.grandis,the difference of tree DBH,height and volume of Eucalyptus urophylla×E.grandis in different stands was obvious,while the difference of the growth increment of Magnoliaceae glance was not obvious;the plant diversity of mixed forest of Eucalyptus urophylla×E.grandis and Magnoliaceae glance was more abundant;the soil of mixed forest was not only loose and aerating but also well structure and fertility compared with that of the pure forest of Eucalyptus urophylla×E.grandis.It is preliminarily considered that the row-like mixing of 1∶3 ration of Eucalyptus urophylla×E.grandis and Magnoliaceae glance is more appropriate.