马尾松林叶面积指数动态变化的遥感监测研究

REMOTE SENSING MONITORING OF DYNAMIC CHANGES OF LEAF AREA INDEX IN MASSON PINE STANDS

本文以浙江省江山市的马尾松幼龄林为试材，测定了各种马尾松林分的叶面积指数，并获取了同期的陆地卫星ＴＭ数据，分析和比较了几种常用的植被指数同林分叶面积指数的关系，总结得出利用航天遥感技术完全可以监测单层林分叶面积指数的动态变化过程，只是当林分的叶面积指数大于６．０时，其监测的灵敏度大为降低。虽然这一研究结果仍是初步的，但这一定量指标的出现，使人们更加深刻地了解到遥感技术以其宏观性强、快速客观准确反映地表森林分布的优势，具有广泛用于森林生态系统和森林质量动态监测研究的巨大潜力。

The relations between leaf area index(LAI) and TM data in various kinds of masson pine stands were investigated in Jiangshan city,Zhejiang province.Leaf area index in various masson pine stands were measured.Timely,TM data were acquired.Relations between several usually used vegetation indices and the leaf area index were compared.We concluded that Satelliteborne remote sensing data could be used to monitor dynamic changes of leaf area index in uniform stand,even though the monitoring accuracy decreased rapidly when the leaf area indexes were greater than 06.Although the study in this paper is a first attempt,it has been made more clear that the remote sensing technique,with its strong ability to describe the forest distribution rapidly and accurately,is promising to be applied in forest ecological systems and forest dynamics changes.