三北地区农田防护林面积的多尺度遥感估算  

Estimation of farmland shelterbelt area in the Three-North Shelter/Protective Forest Program regions of China based on multi-scale remote sensing data

作　　者：郑晓[1,2,3] 朱教君[1,2] 闫妍[1,2,3] 

机构地区：[1]中国科学院沈阳应用生态研究所森林与土壤生态国家重点实验室,沈阳110016 [2]辽宁省生态公益林经营管理重点实验室,沈阳110016 [3]中国科学院大学,北京100049

出　　处：《生态学杂志》2013年第5期1355-1363,共9页Chinese Journal of Ecology

基　　金：中国科学院战略性先导科技专项(XDA05060400);国家自然科学基金项目(31025007);中国科学院知识创新工程重大项目(KZCX1-YW-08-02)资助

摘　　要：农田防护林是三北防护林体系工程重要组成部分,准确估算农田防护林(林带)的数量与空间分布对了解该林种防护效应的发挥程度及促进农田防护林体系建设进程具有重要作用。本研究利用多尺度遥感影像获取林带长度,结合实地调查的林带宽度,估算三北地区(东北西部、华北北部和西北大部;依据地貌特征,将三北地区划分为东北、华北、黄土高原和蒙新4区)农田防护林面积。东北和华北区的林带长度通过建立LandsatTM和SPOT5解译得到的林带长度的关系获得;黄土高原和蒙新区则通过建立有林带农田面积(基于LandsatTM获得)和林带长度(基于CBERS-02B获得)关系获得。结果表明:至2008年,三北地区农田防护林(包括中龄林、成熟林、过熟林;不包括新造林、未成林和部分残次林;下同)总长度为106.40×107m,其中,东北区23.82×107m,华北区6.07×107m,黄土高原区25.58×107m,蒙新区50.93×107m;三北防护林体系工程农田防护林面积约为130.31×104hm2(114.98×104～145.64×104hm2),其中,东北区42.88×104hm2(37.52×104～48.24×104hm2),华北区10.79×104hm2(9.56×104～12.29×104hm2),黄土高原区25.58×104hm2(22.70×104～28.45×104hm2),蒙新区50.93×104hm2(45.20×104～56.66×104hm2);估算的平均精度为89.54%,其中,东北和华北区79.27%,蒙新和黄土高原区99.80%。Farmland shelterbelt is an important component in the Three-North Shelter/Protective Forest Program. To accurately estimate the quantity and spatial distribution of the farmland shel- terbehs in the Three-North regions （ west of Northeast China, north of North China, and most part of Northwest China） is of significance to understand the protective effect of these shelterbehs and to promote their construction processes. Based on the multi-scale remote sensing data to acquire shelterbelt length and the field survey data to obtain shelterbelt width, this paper estimated the farmland shelterbelt area in the Three-North regions that were topographically divided into four areas, i. e. , Northeast China, North China, Loess Plateau, and Northwest China. The shelter- belt length in Northeast China and North China was acquired from the relationships between the shelterbelt lengths from SPOT5 and Landsat TM, while that in Loess Plateau and Northwest China was obtained from the relationships between the shelterbelt lengths from CBERS-02B and the farmland areas from Landsat TM. The results indicated that in 2008, the total length of the farm-land sheherbelts （ including middle-aged, mature, and over-mature shelterbehs, and excluding new planted, un-matured, and part of declined shelterbelts ） in the Three-North regions was 106.40×10^7 m, including 23.82×10^7m in Northeast China, 6.07×10^7 m in North China, 25.55×10^7m in Loess Plateau, and 50.93×10^7m in Northwest China, and the total area of the farmland shelterbehs was about 130.31 ×10^4 hm2 （ 114.98×10^4 - 145.64 ×10^4 hm2 ）, including 42.38×10^4 hm2（37.52×10^4-48.24×10^4hm2） in Northeast China, 10.92x104 hm2（9.56×10^4- 12.29 ×10^4 hm2 ） in North China, 25.58 ×10^4hm2 （ 22.70 ×10^4-28. 45 ×10^4hm2 ） in Loess Plat- eau, and 50.93×10^4 hm2（45.20×10^4-56.66×10^4 hm2） in Northwest China. The mean accura- cy of the estimation was 89.54% （79.27% in Northeast and North China, and 99.80% in Loess Plateau and Northwest China）.

关 键 词：防护林 三北地区 LANDSAT TM SPOT5 CBERS-02B 

分 类 号：S727.2[农业科学—林木遗传育种]