摘要
以美国为例,利用1996～2000年每旬的全球植被指数卫星遥感资料,计算出每年耕地上作物生长季内的总NPP(NetPrimaryProduction)。农作物总产是耕地上总NPP的一部分,根据NPP与作物总产的关系,确定作物的产量转换系数,然后利用当年耕地的总NPP值来估算当年作物的总产。通过研究表明,该方法的预测精度较高,可操作性强,能够投入业务应用。
The total NPP on the agricultural land has been estimated in the period of crop growth from 1996 to 2000 with the global 10-day composite NDVI data. The agricultural production is a part of NPP（Net Primary Production） on the agricultural land. By considering the relation between agricultural NPP and agricultural production, the conversion efficiency of agricultural production from agricultural NPP is made. The agricultural production is estimated based on agricultural NPP and the conversion efficiency. It shows that the accuracy of the model is very satisfactory.The model can be used in the operational crop production forecast.
出处
《气象》
CSCD
北大核心
2005年第8期18-21,共4页
Meteorological Monthly
