Predicting wheat maturity and stay-green parameters by modeling spectral reflectance measurements and their contribution to grain yield under rainfed conditions
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- 作者：Germain Montazeauda ; Handan Karatoğmaa ; Ibrahim Ö ; zturka ; Pierre Roumetb ; Martin Ecarnotb ; Jose Crossac ; Emel Ö ; zerd ; Fatih Ö ; zdemird ; Marta S. Lopesa ; m.dasilva@cgiar.org" class="auth_mail" title="E-mail the corresponding author ; marta.sslopes@gmail.com" class="auth_mail" title="E-mail the corresponding author
- 关键词：DH ; days to heading ; DM ; days to maturity ; Eff ; efficiency ; GM2 ; grain number per square meter ; GY ; grain yield ; MaxNDVI ; theoretical maximum NDVI ; NDVI ; normalized difference vegetation index ; POP ; population ; RS ; rate of senescence ; Stg ; NDVI value at physiological maturity ; SW ; straw weight ; TKW ; thousand kernel weight ; TTMaxNDVI ; theoretical thermal time at MaxNDVI
- 刊名：Field Crops Research
- 出版年：2016
- 出版时间：September 2016
- 年：2016
- 卷：196
- 期：Complete
- 页码：191-198
- 全文大小：895 K
文摘
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Components of stay-green include onset of senescence, maximum ‘greenness’, rate of senescence and residual senescence.
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Components of stay-green were estimated by sequential measurements of normalized difference vegetation index (NDVI).
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Higher grain yields were associated with delayed onset of senescence, increased maximum greenness and accelerated rates of senescence.
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Delayed onset of senescence and high maximum “greenness” resulted in accelerated rates of senescence.
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A new procedure is suggested for estimating days to maturity using sequential NDVI measurements and heading date.