中国水稻科学

中国水稻科学

• 研究报告 • 上一篇    下一篇

高温胁迫下水稻产量的高光谱估测研究

谢晓金1,2;李映雪1; 李秉柏2,*;申双和1;程高峰2   

  1. 1南京信息工程大学 应用气象学院， 江苏 南京 210044； 2江苏省农业科学院 资源与环境研究所， 江苏 南京 210014; *通讯联系人， E-mail: bbli88@163.com
  • 收稿日期:1900-01-01 修回日期:1900-01-01 出版日期:2010-03-10 发布日期:2010-03-10

Estimation of Rice Yield under High Temperature Stress by Hyperspectral Remote Sensing

XIE Xiaojin1,2, LI Yingxue1, LI Bingbai2,*, SHEN Shuanghe1, CHENG Gaofeng2   

  1. 1College of Applied Meteorology, Nanjing University of Information Science and Technology， Nanjing 210044, China; 2Institute of Resources and Environment, Jiangsu Academy of Agricultural Sciences, Nanjing 210014, China; *Corresponding author, E-mail: bbli88@163.com
  • Received:1900-01-01 Revised:1900-01-01 Online:2010-03-10 Published:2010-03-10

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摘要： 为了定量分析不同生育期冠层反射光谱参数与水稻产量及产量构成要素的相互关系，确定能够准确预测高温胁迫下水稻籽粒产量的敏感光谱参数，通过盆栽试验，测定了孕穗期4种温度胁迫处理后的2个水稻品种不同生育期冠层高光谱反射率以及成熟后的理论产量、实际产量、穗数、每穗粒数、千粒重、穗长、穗干质量和结实率。结果表明，相对于蜡熟期的光谱参数，抽穗期和灌浆期的光谱参数与理论产量、实际产量、穗数、每穗粒数、千粒重、穗长、穗干质量以及结实率的相关性都较高，均达到显著水平。此两个时期可以作为预测水稻产量的关键时期。其中， 差值植被指数DVI\[810,A(450,560,680)\]、垂直植被指数PVI(810,680)、红边幅值Dλred和红边峰值面积可以同时预测成熟水稻的理论产量和实际产量。而差值植被指数DVI(810,450)和DVI(810,560)、垂直植被指数PVI(810,680)和Dλred可以同时预测成熟水稻的穗数、每穗粒数和千粒重。相对于灌浆期的模型，抽穗期的模型能较可靠地监测水稻产量。

关键词: 水稻, 高温胁迫, 冠层高光谱反射率, 产量预测, 产量构成因素

Abstract: To determine the relationships between the canopy spectral reflectance indices during different growth stages and grain yield and its components of rice, and to seek the sensitive spectral parameters for exactly estimating rice grain yield under high temperature stress, a pot experiment was conducted with two rice cultivars under four hightemperature stresses at the booting stage. The canopy hyperspectral reflectance at different growth stages after heading, theoretical yield, actual yield, grain number per panicle, grain weight, panicle length, panicle weight and seed setting rate after maturity were measured. The coefficients of correlations between the spectral indices and the theoretical yield, actual yield, panicle number, grain number per panicle, grain weight, panicle length, panicle weight and seed setting rate at the heading and filling stages were significantly higher than those at the ripening stage, and the indices at the heading and filling stages could be key to predicting rice yield. In these spectral indices, the difference vegetation index DVI \[810, A(450,560,680)\], perpendicular vegetation index PVI (810,680), peak value of red edge and area of the red edge peak could be used for simultaneously estimating the theoretical and actual yields of matured rice. Besides, DVI (810,450) and DVI(810,560), PVI (810,680) and peak value of red edge could be used for simultaneously estimating the panicle number, grain number per panicle and grain weight of matured rice. The model based on the indices at the heading stage could monitor rice yield more reliably than that based on the indices at the filling stage.

Key words: rice, high temperature stress, canopy hyperspectral reflectance, yield forecast, yield components, model, remote sensing