XU Xin-juan,ZHANG Jin-yu,CHAO Mao-ni,et al.Study on Soybean Biomass Forecasting Model Based on Canopy Reflectance Spectra[J].HEILONGJIANG AGRICULTURAL SCIENCES,2017,(09):119-123.[doi:10.11942/j.issn1002-2767.2017.09.0119]
基于冠层反射光谱的大豆生物量预测模型研究
- Title:
- Study on Soybean Biomass Forecasting Model Based on Canopy Reflectance Spectra
- 文章编号:
- 1002-2767(2017)09-0119-05
- Keywords:
- remote sensing; vegetation index; biomass; forecasting model; soybean
- 分类号:
- TP79;S565.1
- 文献标志码:
- A
- 摘要:
- 生物量与产量密切相关,建立生物量无损预测模型对于大豆产量预测及栽培管理均有重要意义。通过分析大豆生物量积累量与冠层光谱反射率及其衍生的比值植被指数(RVI)、归一化植被指数 (NDVI)及差值植被指数(DVI)之间的关系,确立大豆生物量积累量的敏感波段及预测模型。结果表明:冠层光谱反射率在560 nm时与大豆地上生物量相关系数最大(R=-0.91,P<0.05),三个可见光波段(485、560和660 nm)和两个近红外波段(830和1 650 nm)组成的比值植被指数RVI(830和560 nm)与大豆生物量积累量的相关系数显著。通过逐步回归分析确立大豆生物量的预测模型,560 nm反射率与大豆地上生物量相关关系的决定指数R2高达0.85,RVI 830_560与大豆地上生物量相关关系的决定指数R2为0.77。
- Abstract:
- Biomass is closely related to the production.To establish nondestructive forecasting model of the biomass have the important meaning for soybean production forecast and cultivation management.By analyzing the relationships of the dry matter accumulation in above-ground part of soybean with the canopy reflectance of single waveband and all two-band combinations in ratio vegetation index(RVI),normalized difference vegetation index(NDVI)and differential vegetation index(DVI),the characteristic spectral wavebands for indicating the dry matter accumulation in above-ground part of soybean were determined,and the corresponding prediction model was established.The results showed that canopy spectral reflectance with soybean biomass had the highest correlation coefficient at 560 nm(R=-0.91,P<0.05); RVI,comprised of three visible wavelengths(485 nm,560 nm and 660 nm)and two near infrared wavelengths(830 nm and 1 650 nm),had significant correlation with soybean biomass accumulation.The soybean biomass prediction model was established by stepwise regression analysis.The determination coefficient R2 of 560 nm reflectivity and biomass was as high as 0.85,and of RVI830_560 and biomass was 0.77.
参考文献/References:
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备注/Memo
收稿日期:2017-06-12基金项目:河南省教育厅高等学校重点科研资助项目(15B210002、17A210010)第一作者简介:徐新娟(1979-),女,河南省漯河市人,硕士,实验师,从事植物营养生理及光合生理研究。E-mail:xinjuan_xu@163.com 。通讯作者:黄中文(1971-),男,河南省潢川县人,博士,教授,从事大豆分子育种研究。E-mail: hzw@hist.edu.cn。