| 摘要: |
| 以冬小麦石家庄8号为材料,对华北平原不同灌溉处理下应用CERES-Wheat模型模拟节水栽培冬小麦生育时期、产量与产量构成因素、生物量、土壤水分含量、土壤硝态氮含量和地上部吸氮量的效果进行了系统分析。结果表明:在节水及不灌溉条件下,CERES-Wheat模型对冬小麦生育时期、产量、生物量的模拟效果良好;在高水分灌溉条件下,模型对生育时期的模拟效果良好,对其他性状的模拟效果不够理想,并且模型过高估计了灌溉对产量的贡献率。该模型可以模拟不同灌溉处理土壤水分动态变化基本特征,但稳定性有待提高。模型对不同灌溉处理2 m土体土壤硝态氮含量的模拟效果较好,对吸氮量的模拟效果较差。要提高模型的系统性精度,需要在模型机制上进一步改进。 |
| 关键词: CERES-Wheat模型 灌溉水平 产量与产量构成因素 生物量 土壤水分 吸氮量 土壤硝态氮 模拟效果 |
| DOI：10.11841/j.issn.1007-4333.2016.06.013 |
| 投稿时间：2015-10-22 |
| 基金项目:国家公益性行业(农业)科研专项(201203031、201303133) |
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| Integrative analysis on the simulated results of CERES-Wheat model under different water regimes in North China Plain |
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ZHOU Li-li, LIU Ke, ZHAO Xue, ZHAO Qian, LIAO Shu-hua, ZHOU Shun-li
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| (College of Agronomy, China Agricultural University, Beijing 100193, China) |
| Abstract: |
| Winter wheat cultivar Shijiazhuang 8 was taken as research material, the growth and development stage, yield and yield components, biomass, soil water content, soil nitrate content and nitrogen uptake amount of CERES-Wheat model under different irrigation conditions in North China Plain were analyzed integratively.The results showed that the simulation effects of growth and development stage, yield and biomass were very good under water saving and rainfed conditions.However, it was only good in the simulation of growth and development stage, but not other biological characteristics under the excessive irrigation treatment, and the model overestimated the contribution of irrigation amount on yield.In conclusion, the CERES-Wheat model can simulate the dynamic change of soil water under different irrigation conditions, but its stability needs to be improved.Furthermore, the performance of the CERES-Wheat model was good in the simulation of soil nitrate amount in 2 m depth soil profile, but not in plant nitrogen uptake amount.Therefore, further modification is needed to improve the systemic precision of the model. |
| Key words: CERES-wheat model irrigation level yield and yield components biomass soil water plant nitrogen uptake amount soil nitrate amount simulation effect |
