کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
10116598 | 1624536 | 2005 | 13 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Is it possible to forecast the grain quality and yield of different varieties of winter wheat from Minolta SPAD meter measurements?
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کلمات کلیدی
موضوعات مرتبط
علوم زیستی و بیوفناوری
علوم کشاورزی و بیولوژیک
علوم زراعت و اصلاح نباتات
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چکیده انگلیسی
A square root model of yield based on NE Ã SPAD gave the best fit (RMSE = 0.6 t haâ1 for both stages) if considering three different groups of genotypes. Based on the same variable, NE Ã SPAD, a quadratic model for NUG without significant effect of genotypes gave the best fit (RMSE, between 21 and 30 kg haâ1 depending of the growth stage). And, for GPC, considering the same three groups of genotypes, the slope of the linear model with the ratio of predicted grain nitrogen concentration to predicted yield, is the same at both stages and very close to the standard value used to calculate protein concentration from nitrogen concentration (5.7), but the predictive quality of the model is more than 10% higher at GS71 (R2 of 0.77) than at flowering (R2 of 0.64). Finally, the sensibility of the models to delay in the stage of measurement is discussed.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: European Journal of Agronomy - Volume 23, Issue 4, December 2005, Pages 379-391
Journal: European Journal of Agronomy - Volume 23, Issue 4, December 2005, Pages 379-391
نویسندگان
Marianne Le Bail, Marie-Hélène Jeuffroy, Christine Bouchard, Aude Barbottin,