桂皮紫萁生长地小气候特征分析

Analysis on the Microclimate Characteristics in Growth Location for Osmunda cinnamomea var. asiatica

通过对长白山区西南坡桂皮紫萁生长地环境小气候考察 ,分析了该植物生长地的小气候特征 ,并对比了 3个样地的光照、温度、空气相对湿度的分布状况和垂直分布形式。结果表明 :桂皮紫萁生长盛期适宜光照度范围为 2 .16万～ 4 .4 8万lx。气温的水平分布表现为复层林组成的样地 ,林内气温高于单层林的样地 ;复层林内气温的垂直变化规律是在活动层以下气温低于林外 ,活动层以上气温高于林外。仿生栽培区应选择由多种林分组成的复层林。山区平坦地泥炭土的热力特性优于山坡地暗棕壤土 ,对植物生长和植物营养积累有利。桂皮紫萁生长地的空气相对湿度范围在 6 5 %～ 90 %。

The microclimate characteristics of Osmunda cinnamomea var. asiatica were analyzed by investigating the microclimate for Osmunda cinnamomea var. asiatica grown in the southwest slope of Changbai Mountains, and the distribution conditions and vertical distribution patterns of light, temperature, air relative humidity of three sample plots were compared. The result showed that the suitable light intensity range in the growth booming phase of Osmunda cinnamomea var. asiatica was 21.6×10 5～44.8×10 5lx. Temperature horizontal distribution showed that the temperature in the sample plot composed of irregular forests was higher than that in the sample plot with regular forest. The temperature vertical change in the stand with irregular forests was that the temperature under the active layer was lower than that outside the stand, and the temperature above the active layer was higher than that outside the stand. The emulational culture area should be located in composite stands. The thermodynamic characteristic of the mountain histosols was superior to that of dark-brown soil of hillside, which was beneficial for plant growth and nutrient accumulation. The air relative humidity range in the growth location for Osmunda cinnamomea var. asiatica was 65%～90%.