玉溪大栗园人工混交林混交模型初步研究

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3．0175。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。

Preliminary Study on Models of Artificial Mixed Forest in Daliyuan of Yuxi

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.