基于DSSAT模型黑龙江庆安不同降水年型水稻灌溉制度

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关键词：降水年型；DSSAT模型；产量；水分生产率；灌溉制度中图分类号：S275.9 文献标志码：A 文章编号：1674-8530（2025）12-1262-10DOI：10.3969/j.issn.1674-8530.24.0189

Abstract： To identify the optimal irrigation regime for rice under diffrent precipitation year types in Heilongjiang，field data from Qing'an County in 2018 and 2019 were collected. The DSSAT-CROPGRO-Rice model was calibrated and validated using these data.A simulation experiment was designed with five irrigation levels （15.0，20.0，25.0，30.0，and 35.O mm per application） and three irrigation frequencies（8，10，and 12 events）.The validated model was used to simulate rice yield under three precipitation year types for each irrigation combination.Water use efficiency was calculated，and optimal irrigation strategies were identified based on the results.The results show that the model accurately simulates phenology，leaf area index，and yield for the rice cultivar "Suigeng 18′′ . Under the same total irrigation amount，yield can be improved by increasing irigation frequency while reducing the volume per application.In allthree precipitation year types，grain yield and water productivity first increase andthen decrease with higher irigation quotas，while irrigation water use efficiency consistently declines.In conclusion，frequent irigation with reduced volume per application is beneficial for increasing yield.The optimal irigation regimes areas follows，for wet years，1O irrigations with a quota of 29.0 mm，for normal years，12 irrigations with a quota of 25.3mm ，and for dry years，1O irrigationswith a quota of 35.2mm。（剩余14230字）