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将桉树U6与厚荚相思按不同比例和不同模式进行混交种植,测定二者的生长参数.结果表明:2～3年生混交林中,随着桉树比例的增大,相思免受风害的效果越来越显著,桉树/相思混交比例为3∶1时,风害率下降了26.14%;但不同处理间桉树或相思保存率没有显著差异;桉树/相思混交种植对相思生长有一定抑制作用,混交林中相思胸径约为其纯林的90%,混交种植虽对桉树高生长影响不明显,但对胸径生长有显著促进作用,并随相思比例的增加而越发明显.6年生的桉树/相思1∶1混交林分,桉树胸径>15cm所占比例达到了32.1%,而桉树纯林仅为5.83%;桉树/相思2∶1株间混交的种植模式使总生物量达到最大,为198.8m3.hm-2,是桉树纯林的118.8%,相思纯林的169.9%;桉树与相思混交种植对大径材桉树的培育是一种理想的种植模式.
Eucalyptus U6 and Acacia crassicarpa were planted in different proportions and different modes, and their growth parameters were measured.The results showed that Acacia was not affected by wind damage in the mixed forest of 2-3 years with increasing proportion of Eucalyptus, The ratio of eucalyptus to Acacia decreased significantly by 26.14% when the proportion of Eucalyptus / Acacia was 3:1, but there was no significant difference in the preservation rates of Eucalyptus or Acacia between different treatments. The mixed growth of Eucalyptus and Acacia confused the growth of Acacia, Acacia DBH in mixed forest is about 90% of that of pure forest, though mixed planting has no obvious effect on height growth of eucalyptus, but it has significant effect on DBH growth and becomes more obvious with the increase of Acacia proportion. 1: 1 mixed forest, eucalyptus DBH> 15cm accounted for 32.1%, while the eucalyptus pure forest was only 5.83%; eucalyptus / acacia 2: 1 mixed planting mode so that the total biomass reached the maximum, 198.8m3 .hm-2, which is 118.8% of the pure eucalyptus forest and 169.9% of the pure Acacia forest. The cultivation of Eucalyptus maculata with mixed culture of Eucalyptus and Acacia is an ideal planting mode.