茶园生态边界层结构及其变化规律

Structure of tea plantation's ecoboundary layer and its variation pattern.

对茶园生态边界层的垂直结构特征及其变化规律的研究表明,茶园冠层的枝叶密集,叶片垂直分布集中。在晴天,由于茶树生理活动的影响,使得温度和湿度垂直分布形成明显的逆温层和正的湿度梯度,在叶片分布层附近达到最大值,向上向下减小,并随天气条件和时间变化而有所不同。生态实体是叶片分布层中生物体与环境之间相互作用而形成的具有特殊生态功能的实体,在较大的尺度上,以独特的生态功能与其周围环境进行物能交换和信息传递。

Characteristics of vertical structure of tea plantation's ecoboundary layer and its variation with time and weather conditions are discussed in this paper. Twigs and leaves are very closely arranged in a tea canopy. Inversion and positive gradients of vertical distributions of temperature and humidity occur within the canopy owing to the influence of plant physiological activities on a clear day. The maxima of temperature and humidity appear near the leaf layer, where from, they decrease downward and upward. The features of vertical structure vary with time and weather conditions. The crown canopy of tea ecosystem, including concentrated leaves and branchlets and their environments, should be recognized as an ecobody because the interactions between' organisms and their environments within the crown are so strong that they could not be separated from each other and be characterized by a special ecological function. On larger scales, ecobody plays a special role in the exehanges of material, energy and information between canopy and its environment.