摘要
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。
In this paper,the authors studied the daily and seasonal change laws of illuminace in and out oak forest. Theresults show: the daily changes of illumince are similar in different layers of oak forest and out oak forest. Theseasonal changes are also similar and reach to max value in July. But while the height falls. the peak value gradually disappears in oak forest. Furthermore, this paper also studied the distribution of illuminace in oak forest andabout 95% of solar rediation 4re absorbed by main forest layers.
出处
《国土与自然资源研究》
1997年第2期65-67,共3页
Territory & Natural Resources Study
关键词
柞木林
光照强度
日变化
季节变化
oak forest
illuminace daily change
seasonal change
