不同密度栓皮栎幼苗冠层结构与LAI关系的分析研究

Canopy Structure and LAI of Quercus variabilis Seedlings at Different Densities

为分析栓皮栎幼苗冠层结构与种植密度的关系,利用LAI-2000植物冠层分析仪、Yaxin-1201植物冠层分析仪和收获法分别测定不同密度下栓皮栎幼苗群体冠层LAI值与群体中不同高度层的LAI值.结果表明:(1)栓皮栎幼苗叶片分布在顶部稀疏,中下部密集,活动面高度在植株高度的1/2处.(2)对于3年龄幼苗50~91株/m2的高种植密度不会制约幼苗生长,因此在栓皮栎苗圃育苗中应当合理密植,以提高苗木产量.(3)Yaxin-1201和LAI-2000植物冠层分析仪测定值与收获法测定值差异不显著(P>0.01).

In order to analyze the relationship between canopy structure and planting density of Quercus variabilis seedlings, the canopy LAI values of Q. variabilis seedlings at different densities and heights were measured by LAI-2000 plant canopy analyzer, Yaxin-1201 plant canopy analyzer and harvest method. The results showed as follows. （1）The distribution of Q. variabilis seedlings leaves were sparse at the plant top, dense in the middle and lower part, and the height of the moving surface is 1/2 in the height of the plant, firstly. （2）For 3 years old seedlings, the high density of 50-91 plant/m2 did not restrict the growth of the plant, so reasonable density be used in nursery to increase the seedling yield. （3）The difference between the measured values of Yaxin-1201, LAI-2000 canopy analyzer and harvest method were not significant.