摘要
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 +P2 d/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 0 175。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 2 0 0株为一混交模型 ,行与行随机排列。试验结果还表明
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 I i=ρ ih/H+p 2d/D+p 3v/V and criterion which was 3 017 5 was calculated by I c=I average +aδ n On the base, the 8 models were evaluated, and the results showed Acacia dealbata×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.?
出处
《云南林业科技》
2000年第3期9-11,共3页
Yunnan Forestry Science and Technology
关键词
混交林
混交模型
选择指标
选择标准
混交树种
mixed forests,mixed forest models,selection indexes,selection criterion
