杉木人工林单叶至冠层光合作用的扩展与模拟研究  

A STUDY ON PHOTOSYNTHESIS:MODELING AND SCALING UP FROM A LEAF TO CANOPY IN A CHINESE FIR PLANTATION

作　　者：肖文发[1] 

机构地区：[1]中国林业科学院森林生态环境研究所

出　　处：《生态学报》1998年第6期621-628,共8页Acta Ecologica Sinica

基　　金：国家自然科学基金

摘　　要：根据野外条件下对杉木（Ｃｕｎｎｉｎｇｈａｍｉａｌａｎｃｅｏｌａｔａ（Ｌａｍｂ．）Ｈｏｏｋ．）针叶光合作用的测定结果，考虑到光合作用对光的非线性响应特性，及其与叶所处的实际冠层环境变量和冠层的空气动力学特性的相关，以简化的林冠辐射传输模型为基础，结合不同部位和年龄针叶的光响应曲线，实现了叶室测量结果向冠层环境的调整，并进行了冠层光合作用模拟的初步研究。经过调整后的冠层光合作用平均比未经过调整的值高１０％；冠层光合作用和气孔导度均具有明显的日变化模式即上午１０００左右为峰值，中午以后不断衰减。这种方法可对冠层光合作用及物质生产进行不同时间和空间尺度上的理论模拟和计算。对人工林产量形成及其生理生态学模拟研究具有重要作用。A simulation model of net photosynthesis rate of canopy was developed with the field measurement of individual leaf in a Cunninghamia lanceolata (Lamb.)Hook.Plantation combining the aero dynamical characteristics and the nonlinear response of photosynthesis to light,based on simplified models of radiation transmission and the photosynthesis photosynthetic active radiation curves ( A PAR)of needles of different ages in different layers of canopy.The results showed that the value adjusted is 10% higher than the unadjusted value.Good diurnal variations of canopy photosynthesis and stomatal conductance were found. The simulation model is a new effort in the field of production ecology of plantation in China.It provided a new approach for calculating and evaluating the forming of stand productivity of plantation.

关 键 词：杉木 光合作用 模拟模拟 单叶 冠层 

分 类 号：S791.270.1[农业科学—林木遗传育种] S718.512[农业科学—林学]