| Simulation of grain filling process of dryland wheat under plastic film mulching and open field cultivation based on the APSIM model |
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| DOI：10.7606/j.issn.1000-7601.2022.06.22 |
| Key Words: wheat grain APSIM model accumulated temperature |
| Author Name | Affiliation | | ZHANG Shilin | College of Life Science and Technology,Gansu Agricultural University, Lanzhou, Gansu 730070, China | | CHENG Hongbo | College of Life Science and Technology,Gansu Agricultural University, Lanzhou, Gansu 730070, China | | CHAI Shouxi | Gansu Provincial Key Laboratory of Arid Land Crop Science/College of Agronomy, Gansu Agricultural University, Lanzhou, Gansu 730070, China | | MA Jiantao | Gansu Provincial Key Laboratory of Arid Land Crop Science/College of Agronomy, Gansu Agricultural University, Lanzhou, Gansu 730070, China | | CHAI Yuwei | Gansu Provincial Key Laboratory of Arid Land Crop Science/College of Agronomy, Gansu Agricultural University, Lanzhou, Gansu 730070, China | | WANG Yanping | Gansu Provincial Key Laboratory of Arid Land Crop Science/College of Agronomy, Gansu Agricultural University, Lanzhou, Gansu 730070, China | | GAO Tiantian | Gansu Provincial Key Laboratory of Arid Land Crop Science/College of Agronomy, Gansu Agricultural University, Lanzhou, Gansu 730070, China | | ZHANG Bo | Gansu Provincial Key Laboratory of Arid Land Crop Science/College of Agronomy, Gansu Agricultural University, Lanzhou, Gansu 730070, China |
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| Abstract: |
| A precise simulation of wheat dry matter accumulation process may provide technical support to regulate wheat production. The data simulated by APSIM model and the field data were used to study dryland winter grain dry matter accumulation process simultaneously. Based on the model validation,the effect of accumulated temperature on wheat grain dry matter accumulation process was analyzed. The APSIM-Wheat model simulated plastic film mulching and open field planting with the coefficient of determination greater than 0.92 for grain weight and grain filling rate at each stage of grain filling.The normalized root mean square error was less than 16.25%, and the effectiveness index was greater than 0.91, indicating that the APSIM-Wheat model had a good fit and adaptability in simulating the wheat grain\|filling process in the study area. Plastic film mulching was better than open field planting. The simulated value of the dry matter accumulation of mulching grains simulated by the model was 5.23% higher than that of the open field planting in the two\|year model simulation. The maximum filling rate of the field measured in the field was on average 10.46% higher than that of the open field. The average grouting rate in the rapid growth period was 13.68% higher than that in the open field. The average in fast increase period was 13.68% higher than that in the open field. The thousand\|grain weight was on average 2.50% higher than that of the open field. Logistic further analysis showed that the plastic film mulching planting was beneficial to advance the time of the maximum grouting rate and reduce the duration of the pyramid period and slowly increase period. Secondly, the accumulated temperature affected the grain filling rate by affecting the daily accumulation of grain dry matter. During the grain filling period, the daily accumulated temperature of the atmosphere and the soil had a very significant positive correlation with the daily accumulation of grain dry matter. |
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