Abstract
With the purpose of evaluating the effect of the mean daily air temperature on grain yield and to predict the occurrence of the maize crop phenological phases as function of heat units, a field experiment was carried out using three hybrids with different heat unit requirements and three sowing dates. To estimate grain productivity, different yield components were determinated. Crop phenology was associated to the relative degree-days, for which a linear relation was observed. There is a mean air temperature corresponding to maximum grain yield, and the crop phenological phases can be predicted knowing the local historical temperature series and the thermic index for physiological maturity.
| Translated title of the contribution | Air temperature, maize yield and phenological characterization associated to heat units |
|---|---|
| Original language | Portuguese |
| Pages (from-to) | 377-383 |
| Number of pages | 7 |
| Journal | Scientia Agricola |
| Volume | 57 |
| Issue number | 3 |
| DOIs | |
| State | Published - Jul 1 2000 |
Bibliographical note
Publisher Copyright:© 2000, Scientia Agricola. All rights reserved.
Keywords
- Maize
- Phenology
- Thermic index