摘要
介绍了叶面积指数主要的测量方法(直接法和间接法),并分析了各种方法的优缺点。同时针对LAI-2000测量的有效叶面积指数较真实值偏小的问题,以小兴安岭林地为研究区,利用外业调查得到的有效叶面积指数,以及根据生物量之间的关系计算得到真实叶面积指数,建立了有效值和真实值二者的线性回归模型,并进行了精度验证,结果表明,该方法可行,精度较高。
The main measurement methods of leaf area index （LAI）,including direct method and indirect method,were introduced,and the advantages and disadvantages of the various methods were also analysed. In allusion to the fact that the LAI-2000 measured value of the effective LAI is lower than the actual value,a linear regression model was established to express the relationship between the effective value and the actual value by the actual LAI calculated from the effective LAI obtained through field surveys. Results show that the model transformation method is feasible and the regression model has a high precision according to the accuracy verification.
出处
《东北林业大学学报》
CAS
CSCD
北大核心
2010年第7期126-128,共3页
Journal of Northeast Forestry University
基金
国家高技术研究发展("863")计划(2006AA12Z104)
关键词
叶面积指数
测量方法
模型
Leaf area index
Measurement methods
Models
