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基于多時相多參數(shù)融合的麥玉輪作小麥產(chǎn)量估算方法
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國家重點(diǎn)研發(fā)計(jì)劃項(xiàng)目(2022YFD2001502)


Estimation of Wheat Yield in Wheat-Maize Rotation Based on Multi-temporal and Multi-parameter Fusion
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    摘要:

    為了進(jìn)一步提高冬小麥產(chǎn)量預(yù)測的準(zhǔn)確性,,針對麥玉輪作體系缺乏直接把前茬作物信息納入到當(dāng)季作物的產(chǎn)量估算及管理中的研究狀況,利用前茬玉米季中長勢遙感信息及產(chǎn)量信息,融合小麥拔節(jié)期,、灌漿期及成熟期長勢遙感信息,、播前施肥信息及土壤特性信息等多時相多模態(tài)數(shù)據(jù),基于GPR算法,,建立多時相多模態(tài)參數(shù)融合的麥玉輪作體系小麥產(chǎn)量估算模型,,結(jié)果顯示:基于多生育期的產(chǎn)量估算模型較單生育期最優(yōu)產(chǎn)量估算模型性能有所提升,R2提高0.01~0.03,。其中基于拔節(jié)期產(chǎn)量估算模型精度略低于多生育期產(chǎn)量估算模型,,但精度相近?;诙嗄B(tài)參數(shù)融合的產(chǎn)量估算模型中,,除玉米作物信息與土壤特性信息融合構(gòu)建的產(chǎn)量估算模型,多模態(tài)參數(shù)融合的產(chǎn)量估算模型精度較相應(yīng)低模態(tài)參數(shù)融合的產(chǎn)量估算模型精度高,。四模態(tài)參數(shù)融合的GPR模型決定系數(shù)R2為0.92,,RMSE為213.75kg/hm2,較其他模型,,R2提高0.02~0.41,。對于小麥產(chǎn)量估算模型,,各模態(tài)參數(shù)影響由大到小依次為施肥信息,、小麥遙感信息、土壤特性信息,、玉米作物信息,。玉米作物信息對于多模態(tài)參數(shù)融合的小麥產(chǎn)量估算模型精度提升最小,R2總體提升0.02~0.07,。玉米作物信息在一定程度表征了收獲后土壤肥力狀況,,是土壤特性信息的高空間分辨率補(bǔ)充,可以進(jìn)一步提高量化土壤肥力的能力,,與其他參數(shù)信息結(jié)合,,提高了小麥產(chǎn)量估算精度,為麥玉輪作體系土壤-作物數(shù)據(jù)的綜合利用及輪作體系的綜合管理提供了科學(xué)依據(jù)和方法思路,。

    Abstract:

    Yield prediction models can be improved by better integration of data and algorithms, and the accuracy of yield prediction can be further improved by incorporating other factors such as those affecting yield into the model. The research situation was addressed that the wheat-maize rotation system lacked the direct incorporation of the previous crop information into the yield prediction and management of the seasonal crop, a multi-temporal and multimodal crop yield prediction model based on GPR was established by using remote sensing information of the growing season and yield information of the previous maize crop, fusing multi-temporal and multimodal data such as remote sensing information of wheat growing season at the jointing stage, filling stage and maturity stage, fertilization information before sowing and soil properties. The results showed that the performance of the yield prediction model based on the multiple growth periods was improved compared with that based on the single growth period, in which the decision coefficient R2 of the yield prediction model was improved by 0.01~0.03. The accuracy of the yield prediction model based on the spectral indexes of wheat growing season at the jointing stage was higher than the accuracy of the yield prediction model based on the spectral indexes of wheat growing season at the filling stage, and the accuracy of the yield prediction model based on the spectral indexes of wheat growing season at the maturity stage was the lowest, and the accuracy of the yield prediction model based on the jointing stage was slightly lower than that of the yield prediction model based on the multiple growth periods, but the accuracy was similar. In the yield prediction models based on the multimodal parameters fusion, the yield prediction models based on two-modal parameters fusion had higher accuracy than the unimodal yield prediction models, except for the yield prediction model constructed by fusing maize information with soil properties. The accuracy of the yield prediction models with four-modal parameters fusion and three-modal parameters fusion was higher than that of the corresponding yield prediction models with low-modal parameters fusion. The GPR model with four-modal parameters fusion had a decision coefficient R2 of 0.92 and RMSE of 213.75kg/hm2, which improved R2 by 0.02 to 0.41 compared with the wheat yield prediction models based on other modalities. For wheat yield prediction models based on multimodal parameters fusion, from large to small, the influence of each modal parameters was as follows: fertilization information, wheat remote sensing information, soil properties information, maize crop information. Maize crop information had the least improvement in the accuracy of the yield prediction models based on the multimodal parameters fusion, which improved R2 by 0.02~0.07. Maize crop information characterized the soil fertility condition of post-harvest to a certain extent, and it was a high spatial resolution supplement to soil properties information, which could further improve the ability to quantify soil fertility, then combined with other parameters, they can improve the accuracy of wheat yield prediction. In conclusion, the research result provided a scientific basis and method for the comprehensive utilization of soil-crop data and the comprehensive management of wheat-maize rotation system.

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李陽,苑嚴(yán)偉,趙博,王吉中,偉利國,董鑫.基于多時相多參數(shù)融合的麥玉輪作小麥產(chǎn)量估算方法[J].農(nóng)業(yè)機(jī)械學(xué)報(bào),2023,54(12):186-196. LI Yang, YUAN Yanwei, ZHAO Bo, WANG Jizhong, WEI Liguo, DONG Xin. Estimation of Wheat Yield in Wheat-Maize Rotation Based on Multi-temporal and Multi-parameter Fusion[J]. Transactions of the Chinese Society for Agricultural Machinery,2023,54(12):186-196.

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  • 收稿日期:2023-05-26
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  • 在線發(fā)布日期: 2023-07-25
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