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| DOI： |
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| Application Research of Crop Growth Model WOFOST in Lalin River Basin |
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CHEN Hao， HONG Lin， LUO Dewei
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State Key Lab of Water Resources and Hydropower Engineering Science, Wuhan University, Wuhan 430072, China;Hydrochina Kunming Engineering Corporation Limited, Kunming 650033, China； Environmental Monitoring Station of Xiangyang City, Xiangyang 441021, China.
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| Abstract: |
| In order to evaluate the applicability of crop growth model WOFOST in simulation of spring maize growth stages in Lalin basin in northeastern China, 4 irrigation experiment stations (Haerbin, Shuangcheng, Shangzhi and Fuyu) were selected to establish the climate, soil, crop databases of the model. The growing stages of spring maize in 2013, biomass accumulation process in Haerbin station in 2009, spring maize yield in the four stations between 2009 and 2013, and the soil water content in the four stations in 2009 were simulated using the model, and compared with the measured values. The results showed that the MAE of DOY was 1.57 d, standard deviation was 1.54 d, RMSE was 1.85 d; the MAE of soil water content was between 1.38% and 1.75%, the RMSE was between 1.87% and 2.33%, and the MEI was between 0.48 and 0.73; the MEI of leaves, stems, ears dry matter was between 0.82 and 0.94, and the RMSE and MEI of yield were 0.72 t/hm2 and 0.15, respectively. The above applicable indexes were all in range of credible which proved that the corrected WOFOST crop model had certain applicability in spring maize production areas in northeastern China. |
| Key words: model; spring maize; DVS; soil water content; biomass; yield |
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