CAJ | 학술논문

利用甘南地区2006-2007年的外业实测样方草地干物质产量和MODIS植被指数数据,建立了草地地上部分干物质产量遥感反演模型,根据根冠比和干物质转碳率对2006-2008年甘南地区草地净初级生产力(NPP,net primary productivity)进行了估算,绘制了甘南草地NPP年累积量空间分布格局图和NPP月度变化动态图,对不同草地植被类型的NPP差异进行了评价.研究结果表明,2006-2008年甘南草地年NPP分别达637.04,599.98和566.59 g C/m~2,其空间分布具有自西南向东北逐渐减少的趋势;年内不同草地类型的NPP均在7-8月达到最大累积量;NPP累积量最高的3种草地类型是沼泽、高寒灌丛草甸和高寒草甸,3年中最大月NPP的平均值分别达到1 137.28,553.76和527.66 g C/m~2;2006-2008年甘南草地NPP持续下降,年草地NPP总量的减少速率为1.2 Tg/a,尤其是沼泽湿地的NPP下降明显,年平均减少速率达到了125.92 g C/m~2.
이용감남지구2006-2007년적외업실측양방초지간물질산량화MODIS식피지수수거,건립료초지지상부분간물질산량요감반연모형,근거근관비화간물질전탄솔대2006-2008년감남지구초지정초급생산력(NPP,net primary productivity)진행료고산,회제료감남초지NPP년루적량공간분포격국도화NPP월도변화동태도,대불동초지식피류형적NPP차이진행료평개.연구결과표명,2006-2008년감남초지년NPP분별체637.04,599.98화566.59 g C/m~2,기공간분포구유자서남향동북축점감소적추세;년내불동초지류형적NPP균재7-8월체도최대루적량;NPP루적량최고적3충초지류형시소택、고한관총초전화고한초전,3년중최대월NPP적평균치분별체도1 137.28,553.76화527.66 g C/m~2;2006-2008년감남초지NPP지속하강,년초지NPP총량적감소속솔위1.2 Tg/a,우기시소택습지적NPP하강명현,년평균감소속솔체도료125.92 g C/m~2.
Dry matter yield information from field surveying quadrats and MODIS vegetation index data in Gannan Prefecture during 2006-2007 were used to construct a remote sensing monitoring model for aboveground dry matter biomass of grassland. The net primary product (NPP) of grassland was estimated and used to, complete the spatial distribution maps of annual NPP accumulation and monthly NPP dynamic changes, and to evaluate the NPP difference between various grassland vegetation types. The annual maximum NPP of grassland in Gannan Prefecture during 2006-2008 were 637.04, 599.98 and 566.59 g C/(m~2·a), respectively. The distribution of annual maximum NPP has a trend of gradual reduction from southwest to northeast and the yearly maximum NPP accumulation of all grassland types was in July and August. The three grassland types with the highest NPP accumulation were marsh, alpine shrub meadow, and alpine meadow, with monthly maximum NPP values of 1 137.28, 553.76 and 527.66 g C/m~2, respectively (mean values for the three years). The grassland NPP in Gannan Prefecture was continuously decreasing over the three years, with an annual reduction forthe total grassland of 1.2 Tg/a. The reduction of marsh NPP is especially significant, with an annual rate of 125.92 g C/(m~2·a).