西双版纳橡胶林面积遥感监测和时空变化

旨在利用遥感手段监测橡胶林种植面积,探讨橡胶林的林龄划分方法,揭示橡胶林时空格局变化规律,为认识橡胶林的林龄结构、空间扩展模式和理解区域土地利用变化及其生态环境效应提供科学基础。该文基于RS和GIS技术,研究了西双版纳地区橡胶林的生长过程,并提出了基于橡胶林从种植到生长过程的归一化植被指数(NDVI,normalized difference vegetation index)时间序列变化,判断橡胶林的林龄阶段的方法。并进一步从种植面积、空间分布、林龄结构、地类转变关系4个方面,探讨了西双版纳地区1990-2014年橡胶林的时空变化。研究发现:西双版纳橡胶林按年龄阶段可划分为橡胶幼林(0~5...

Full description

Saved in:
Bibliographic Details
Published in农业工程学报 Vol. 30; no. 22; pp. 170 - 180
Main Author 廖谌婳 李鹏 封志明 张景华
Format Journal Article
LanguageChinese
Published 中国科学院大学,北京 100049%中国科学院地理科学与资源研究所,北京,100101 2014
中国科学院地理科学与资源研究所,北京 100101
Subjects
Online AccessGet full text
ISSN1002-6819
DOI10.3969/j.issn.1002-6819.2014.22.021

Cover

More Information
Summary:旨在利用遥感手段监测橡胶林种植面积,探讨橡胶林的林龄划分方法,揭示橡胶林时空格局变化规律,为认识橡胶林的林龄结构、空间扩展模式和理解区域土地利用变化及其生态环境效应提供科学基础。该文基于RS和GIS技术,研究了西双版纳地区橡胶林的生长过程,并提出了基于橡胶林从种植到生长过程的归一化植被指数(NDVI,normalized difference vegetation index)时间序列变化,判断橡胶林的林龄阶段的方法。并进一步从种植面积、空间分布、林龄结构、地类转变关系4个方面,探讨了西双版纳地区1990-2014年橡胶林的时空变化。研究发现:西双版纳橡胶林按年龄阶段可划分为橡胶幼林(0~5 a)、橡胶成林(>5~13 a)、橡胶老林(>13 a);1990-2014年,橡胶林种植面积总体上呈增加趋势,橡胶林的林龄结构有所变化。1990年橡胶林空间分布从中心到外围为老林-幼林/成林,2000年变为老林-成林-幼林,2010年和2014年为幼林-老林-成林且这一趋势更为明显;西双版纳自然保护区橡胶林种植面积和种植密度远远低于非自然保护区。橡胶林扩张以侵占天然林为代价,热带季雨林是受橡胶林扩张干扰最强烈的天然林。该研究以2月下旬-4月中旬为提取橡胶林的时间窗口,利用逐旬的归一化植被指数、土壤亮度指数、土壤湿度指数、近红外反射率变化特征提取橡胶林空间分布信息效果较好。此外,基于NDVI阈值的橡胶林林龄阶段判别方法,也具有一定的普适性。
Bibliography:11-2047/S
As one of the major commercial crops in Xishuangbanna, Southwest region of China, rubber plantations have been expanding rapidly in the recent decade, which mainly occupied agricultural lands and secondary forest covers. These land use and land cover changes have negative influences on regional ecosystem and ecological processes. Based on the RS and GIS technology, the growth process of rubber plantations in Xishuangbanna was explored in this article and a method of judging the forest age of rubber plantations was put forward in the study area. Firstly, by using the multi-temporal Landsat images (16-days interval from January to April in 2014), time series changes of NDVI, NIR, Bright and Wetness of rubber plantations and other vegetation covers were constructed. It was found that the period from late February to mid-April was the optimal time for extracting rubber plantations. NDVI and NIR had better effects on the discrimination of rubber plantations and other vegetations. Then, annual Lan
ISSN:1002-6819
DOI:10.3969/j.issn.1002-6819.2014.22.021