基于MODIS数据和地形因子的大兴安岭呼中林区净初级生产力变化分析  

Effects of Topographic Factors on Forest Net Primary Productivity in Huzhong Forest Region of Great Xing'an Mountains

作　　者：李海臣 

机构地区：[1]大兴安岭呼中林业局营林管理处,黑龙江呼中165036

出　　处：《安徽农业科学》2014年第32期11578-11579,共2页Journal of Anhui Agricultural Sciences

摘　　要：对大兴安岭呼中林区的MODIS初级净生产力(NPP)数据产品结合坡度、坡向、海拔等地形因子进行分析,得出2010年该区域NPP的均值为0.279 5 kg(C)/m2。NPP随地形因子的总体分布规律为:海拔越高,坡度越大,NPP越低,但平地的NPP明显低于坡地,在空间上的波动性也明显高于坡地。在各地形因子中,除海拔对NPP的影响显著外,其他地形因子对NPP的影响均不显著,各地形因子之间的交互影响也不显著,但不同坡度之间的NPP仍有较大差异,坡度也是空间上影响NPP分布的一个重要因子。The MODIS NPP data of Huzhong forest region in Great Xing＇ an Mountains combined with terrain factors,such as slope,aspect,altitude,were analyzed.It was obtained that NPP mean in 2010 is 0.279 5 kg （C）/m^2.The distribution of NPP with the terrain factors is that the NPP is generally declining with the altitude increasing,and the trend is similar to the slope.But,the NPP in flat fields is significantly lower compared to the sloping fields,and the uncertainty in flat fields is also significantly higher.Of all terrain factors,altitude factor＇ s impact on NPP is significant,and the interaction between factors is not significant.

关 键 词：NPP 坡度 坡向 海拔 

分 类 号：S126[农业科学—农业基础科学]