| Technology and Methodology |
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A Comparative Study of Two Dynamic Simulated Methods for Spring Wheat Leaf Area Index in Ningxia Irrigation Area |
| ZHANG Xue-yi1,2, LI Jian-ping1, GUAN Jing-de1, QIN Qi-ming3, Ma Li-wen1, CAO Ning1 |
1. Ningxia Key Laboratory for Meteorological Disaster Prevention and Reduction, Yinchuan 750002, China;
2. Nanjing Information Engineering University, Nanjing 210044, China;
3. Institute of Remote Sensing and GIS, Peking University, Beijing 100871, China |
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Abstract In order to obtain the best dynamic simulation method for the Leaf Area Index (LAI) of the spring wheat in Ningxia irrigation area, the authors, based on the spring wheat LAI data observed over the land from the typical agrometeorological experiment station in Ningxia irrigating area, used the agrometeorological method and the remote sensing inverting method to simulate the dynamic changes of the LAI and then to compare the simulation accuracies of the two kinds of methods. The best simulated model for the spring wheat LAI in the whole growth period was eventually obtained. It is revealed that, when LAI is less than 4.5 and PD is less than 40,the remote sensing inverting method should be adopted for simulation,and when PD is more than 40,the agrometeorological method should be employed,and only by combination of the two methods can the best result be achieved.
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Issue Date: 07 September 2011
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2011,
Vol. 23
