用蓝桉、麻栎、藏柏、山樱桃、圣诞树、山合欢等作混交树种，在玉溪大栗园开展了8种人工混交林混交模型的试验研究，依据Ii=P1h/H+P2d/D+P3v／V计算混交模型的选择指标，用I标=I平均+aδn计算出混交模型的选择标准为3．017 5。据此对参试的混交模型进行评定，结果以圣诞树×山樱桃带状混交效果最好，其次是藏柏×山合欢、藏柏×圣诞树带状混交。3种入选的混交模型的配置方式为：混交林株行距为1m×2m的带状混交，混交林配置树种以50株为1行，4行200株为一混交模型，行与行随机排列。试验结果还表明：混交林中各树种单株的生长量比纯林高。%Species of Eucalyptus globulus, Quercus acutissima, Cupressus torulosa, Prunu conradinae, Acacia dealbata and Albizia mollis applied for mixed forest, the experiment on 8 artificial mixed forest models was carried out in Daliyuan of Yuxi. Indexes of mixed forest models were calculated by and criterion which was 3.017 5 was calculated by On the base, the 8 models were evaluated, and the results showed Acacia dedbata × Prunu conradinae row mixed model has the best effect, then Cupressus torulosa × Albizia mollis and Cupressus torulosa × Acacia dealbata belt mixed models. The pattern of 3 mixed models selected is belt mixed forest with row space of 1m × 2m, 50 allocated trees as a row and 4 random arranged rows as a mixed model. The experiment also showed the individual of the species in mixed forests grew faster than that in pure forests.
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