CAJ | 학술논문

利用基于遥感数据的光能利用模型-CASA模型估算了2005年甘肃草地生态系统NPP,分析了其空间格局,以及地形因素对草地NPP的影响。（1）实测数据与模拟结果对比表明,修正后的CA-SA模型的可操作性强,仅利用地面气象数据和遥感数据就可以对草地生产力进行模拟,模拟效果较好。（2）2005年甘肃省草地NPP总量为3.76×1013g/（m2.a）,最高值达790.56g/（m2.a）,年均值为139.15g/（m2.a）,由西南向东北逐渐减少。（3）草地NPP季节变化非常明显,夏季NPP达到最大值;冬季植被基本停止生长,草地NPP值最低。4）在海拔3 000～3 500m区域、25°～30°坡度以及东坡草地NPP均达到较高水平。
이용기우요감수거적광능이용모형-CASA모형고산료2005년감숙초지생태계통NPP,분석료기공간격국,이급지형인소대초지NPP적영향。（1）실측수거여모의결과대비표명,수정후적CA-SA모형적가조작성강,부이용지면기상수거화요감수거취가이대초지생산력진행모의,모의효과교호。（2）2005년감숙성초지NPP총량위3.76×1013g/（m2.a）,최고치체790.56g/（m2.a）,년균치위139.15g/（m2.a）,유서남향동북축점감소。（3）초지NPP계절변화비상명현,하계NPP체도최대치;동계식피기본정지생장,초지NPP치최저。4）재해발3 000～3 500m구역、25°～30°파도이급동파초지NPP균체도교고수평。
As a light use efficiency model based on remote sensi the grassland NPP in Gansu Province in 2005. The spatial pattern ng of data,CASA model was set up to estimate grassland NPP and its response to topo graphic factors were also analyzed. Results showed that the improved CASA model indicated better estimation effects and maneuverability with the comparison of estimated and observed data. The total NPP of grassland in Gansu Province was 3.76 × 1 0^13 g/(m2· a),with highest and average value of 790.56 g/(m2· a) and 139.15 g/ (m2·a),respectively. There was obvious seasonal change in the grassland,the NPP was high in summer, and lowest in winter. It represented decreasing trend from northwest to northeast,and higher value in 3 000~3 500 m,25-30°and sunny slope in general.