论文部分内容阅读
对天然次生柞木林内不同层次及林内外的光照强度进行了日、季变化规律的研究。晴天具有相似的日变化规律,呈单峰曲线,中午12时左右达到最大值;而在多云条件下,上述规律常常被破坏,季节变化,变化趋势一致,7月份达最大值,但随着离度下降,峰值逐渐消失;对照区和林冠表面受气候条件影响较大.还对柞木林内光照强度的分布格局进行了研究,近95%的太阳辐射能被主林层吸收。
The daily and seasonal variation of light intensities in different layers of natural secondary oak forest and in and outside the forest were studied. The sunny day has a similar diurnal variation, showing a single peak curve, reaching the maximum around 12 noon; while in cloudy conditions, the above rules are often destroyed, the seasonal changes, the trend of change consistent with the maximum in July, but with the distance Degree of decline, the peak gradually disappear; control area and canopy surface affected by climatic conditions. The distribution pattern of light intensity in oak forest was also studied. Nearly 95% solar radiation was absorbed by the main forest.