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基于時間序列MODIS NDVI的冬小麥產(chǎn)量預(yù)測方法
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國家高技術(shù)研究發(fā)展計劃(863計劃)項目(2013AA10230103)和國家自然科學(xué)基金項目(41371326)


Winter Wheat Yield Forecasting Based on Time Series of MODIS NDVI
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    摘要:

    選擇我國河北,、河南,、山東3省作為研究區(qū),,在250 m空間分辨率的冬小麥種植區(qū)和1 km的冬小麥像元純度圖的基礎(chǔ)上,,分析了2000—2009年MODIS NDVI抽穗期峰值與單產(chǎn)的時間序列變化關(guān)系,。采用Becker-Reshef等提出的去噪聲修正后的冬小麥抽穗期NDVI峰值與單產(chǎn)進(jìn)行回歸分析建立冬小麥產(chǎn)量預(yù)測模型,,并分析冬小麥預(yù)測精度的影響因素,。最后,,利用2010年地級市尺度的統(tǒng)計單產(chǎn)對所建立的預(yù)測模型進(jìn)行精度驗證,,模型的平均估產(chǎn)誤差約為7.49%,。結(jié)果表明,基于冬小麥抽穗期NDVI峰值的產(chǎn)量預(yù)測方法在中國冬小麥主產(chǎn)區(qū)具有一定的應(yīng)用潛力,。

    Abstract:

    The large regional-scale crop yield forecasting is of great significance to ensure national food security and agricultural sustainable development. To predict regional-scale winter wheat yield, the winter wheat forecasting method proposed by Becker-Reshef was implemented in major winter wheat planting areas in China. Firstly, the winter wheat planting areas were extracted through time series of MODIS NDVI with 250 m spatial resolution in Hebei, Henan and Shandong Provinces. Winter wheat adjusted NDVI peak at the heading stage was used to analyze the correlation with winter wheat yield on the purest wheat pixels from 2000 to 2010. Winter wheat yield prediction models were established through the regression statistical relationship between NDVI peak at heading stage and winter wheat yield at the prefecture-city unit from 2000 to 2009. The results showed that the dense wheat planted cities had good model accuracy. Finally, the accuracy of prediction models was evaluated by using the statistical winter wheat yield in 2010. The results showed that winter wheat yields could be forecasted two months in advance with average forecasting error of 7.49%, and the yield forecasting method using adjusted NDVI peak at heading stage had considerable potential applications at the prefecture-city scale in China. The study provides basis and a method for other crops yield forecasting in agricultural regions.

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黃健熙,羅倩,劉曉暄,張潔.基于時間序列MODIS NDVI的冬小麥產(chǎn)量預(yù)測方法[J].農(nóng)業(yè)機(jī)械學(xué)報,2016,47(2):295-301. Huang Jianxi, Luo Qian, Liu Xiaoxuan, Zhang Jie. Winter Wheat Yield Forecasting Based on Time Series of MODIS NDVI[J]. Transactions of the Chinese Society for Agricultural Machinery,2016,47(2):295-301.

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  • 收稿日期:2015-09-27
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  • 在線發(fā)布日期: 2016-02-25
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