| Applicability and error analysis of leaf area index model of summer maize |
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| DOI：10.7606/j.issn.1000-7601.2019.05.11 |
| Key Words: LAI Logistic model summer maize applicability Henan Province |
| Author Name | Affiliation | | PENG Ji-yong | Henan Institute of Meteorological Science, Zhengzhou, Henan 450003, China
Key Laboratory of Agrometeorological Support and Applied Technique, China Meteorological Administration, Zhengzhou, Henan 450003, China | | LI Jun-ling | Henan Institute of Meteorological Science, Zhengzhou, Henan 450003, China
Key Laboratory of Agrometeorological Support and Applied Technique, China Meteorological Administration, Zhengzhou, Henan 450003, China | | ZHANG Zhi-hong | Henan Institute of Meteorological Science, Zhengzhou, Henan 450003, China
Key Laboratory of Agrometeorological Support and Applied Technique, China Meteorological Administration, Zhengzhou, Henan 450003, China |
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| Abstract: |
| In order to study the applicability of Logistics model for leaf area index (LAI), summer maize data and meteorological data from Zhengzhou agricultural meteorological station from 2009 to 2013 were used to establish Logistic LAI model. The model was verified by four years data from 2014 to 2017. To further explore applicability of the model in different regions, four summer maize varieties were sown by four stages in 2014 and 2015 in four stations (Hebi, Yellow river flooded area, Zhumadian and Zhengzhou). The model was verified by 4 stations data in 2 years. The results showed that the trend of measured values was basically the same as that of simulated values. The mean absolute error of three leaf stage and seven leaf stage was between 0.01~0.23, the average relative error was 0%~12%. The absolute error of jointing stage, male pumping stage, and 10 d after tassel was 0~1.11, and relative error was 0%~62%. Mean absolute error between simulated values and measured values was 0.06~0.32, and the average relative error was 4%~18%. On the whole，the model showed good applicability in different years and in different regions. It can be used for the simulation leaf area index under the condition of normal growth of summer maize, which provided reliable data support for the promotion and application of Logistic leaf area index model. |
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