利用树轮资料和植被指数估测青海云杉林地上净初级生产力
Estimation of Piceacrassifolia forest aboveground net primary productivity from tree ring data and vegetation index

利用MODIS产品MOD13A3、样地调查数据和树轮资料等数据，构建回归模型以估测祁连山森林保护区的青海云杉林地上净初级生产力（ANPP）. 结果表明：经质量权重S-G滤波后，回归模型的估测精度有所提高；2000-2013年祁连山森林保护区青海云杉林ANPP呈现波动上升的趋势，空间分布特征为东南多西北少，多年平均森林ANPP为51.34~274.24 g·m-2；青海云杉林ANPP与降水和温度呈正相关，受温度变化影响较小，降水成为影响其变化的主要因子.
The MOD13A3 EVIproducts，forest inventory data and tree ring data were used to estimateANPP of Piceacrassifolia in nature reserve of Qilian Mountainby the regression model.The performance of iEVI in estimating ANPP was improved after the quality weighted S-G method. The annual forest ANPP showed a fluctuant increasing trend from 2000 to 2013 in the nature reserve of Qilian Mountain. Furthermore，the ANPP increased from the northwest to the southeastern and the annual average ANPP was 51.34~274.24 g·m-2. The ANPP of Piceacrassifoliawas positively correlated with precipitationand temperature. Compared with the temperature，the precipitation is main factor affecting the change of ANPP