我国北方河口湿地植被储碳、固碳功能研究——以辽河三角洲盘锦地区为例

Carbon storage and fixation by wetland vegetation at the estuaries in northern China: A case of Panjin area,Liaohe Delta

利用2007年7月和10月的CBERS卫星遥感数据,结合地理信息系统(GIS),采用混合分类法,解译分析了辽河三角洲盘锦地区湿地植被的空间分布格局。在湿地植被典型分布区设置4条调查带,共计40个调查样方,通过对采集样品的收割、烘干和称质量处理,测算得到了辽河三角洲主要湿地植被的生物量和净初级生产力,研究了该地区湿地植被的储碳和固碳能力。结果表明:稻田、河口水域和芦苇湿地为辽河三角洲盘锦地区湿地的主要组成类型。该地区植被的总储碳量达7.63×106t,芦苇和水稻是该区域最主要的固碳植被,其碳储量分别占该区域植被总储碳量的45.91%和37.03%;该地区植被的平均固碳量达17.68 t/(hm2.a),是我国陆地植被平均固碳能力的3.59倍、全球植被平均固碳能力的4.31倍;辽河三角洲盘锦地区湿地植被年固碳能力相当于相同面积、同等植被覆盖度条件下的温带落叶阔叶林固碳能力的1.01倍。

Based on remote sensing data from China-Brazil Earth Resources Satellite（CBERS） and field observation in growing seasons,spatial distribution patterns of the wetland vegetation in Panjin area,Liaohe Delta are analyzed.Individual plants of 40（1 m×1 m） sampling boxes from 4 sampling belts in typical wetland vegetation distribution region were cut for Phragm itesaustralis and pick up with root for Suaeda heteroptera and the samples were collected and dried for weighting,the results are used to study the biomasses of main vegetation forms and primary productivities of the wetland vegetation.Consulting relevant models to study carbon fixation of vegetation both at home and abroad,carbon storage and fixation by wetland vegetation in Panjin region,Liaohe Delta were estimated on the platform of Geographical Information System.The results show that the total carbon storage in the region is 7.63×106 t.P.australis and Oryza sativa L are two main types of carbon storage wetland vegetation,which account for 45.91% and 37.03% the total wetland vegetation carbon storage respectively.The average carbon fixation capability of the wetland vegetation in Liaohe Delta is 17.68 t/（hm2·a）,which is 3.59 times that of the terrestrial vegetation in China and 4.31 times that of the world.The main cabon fixation wetland vegetations are Phragm itesaustralis,Suaeda heteroptera,Oryza sativa L.and arid crop.The carbon fixation of the wetland vegetation here is equal to 1.01 times that of temporal deciduous broad-leaved forest.