垂直成层

主要研究结果如下：（1）飞播油松群落水平呈块状分布、垂直成层现象明显。

The research of environment conditions was also carried on in Aerial Seeding Pinus tabulaeformis stands in different densities . The main results are as follows : 1 , The spatial distribution of aerial seeding Pinus tabulaeformis communities showed block distribution horizontally and with obvious vertical layers .

根据群落的垂直结构和成层现象，应用红外线CO2气体分析法，分层测定了主要植物22种58株的光合速率。

The photosynthetic rates of 58 individuals of 22 main species at different layers of community were measured with an infrared CO_2 analyzer .

从种群生态位基础来看，表现为所研究的各生态因素在地上部分和地下部分呈垂直上的成层性和水平上的交错和镶嵌性；

From the standpoint of the population niche , the above-ground and underground parts of the ecological factors studied had the characteristics of vertical layering and horizontal intersection and incrustation .