Evaporation from the irrigation water, foliage and panicles of paddy rice in north-east Sri Lanka
✍ Scribed by C.H. Batchelor; John Roberts
- Publisher
- Elsevier Science
- Year
- 1983
- Weight
- 682 KB
- Volume
- 29
- Category
- Article
- ISSN
- 0002-1571
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✦ Synopsis
Transpiration from a paddy rice canopy was estimated by combining measurements of leaf and panicle conductances with meteorological data in the Penman--Monteith equation. There was good agreement between the total seasonal water use calculated by this method, and that calculated using the Penman equation and locally-determined crop factors. After heading, the transpiration from the panicles accounted for 27% of the total transpiration of the canopy. The total evaporation for the 1981 cropping season from transplanting to harvest was 646 mm, of which 188, 395 and 63 mm were evaporated from the irrigation water, foliage and panicles, respectively.