Energy balance of wetland rice | |
| Author | Puma, Manuel Coronado |
| Call Number | AIT Thesis no. AE-87-06 |
| Subject(s) | Water in agriculture Evapotranspiration |
| Note | A thesis submitted in partial fulfillment of the requirements for the degree of Master of Engineering, School of Environment, Resources and Development |
| Publisher | Asian Institute of Technology |
| Abstract | Energy balance and crop Water-use of a Wetland ricefield subjected to 10 days drying periods at the maximum tillering and flowering stages, respectively, were investigated at the Asian Institute of Technology, Bangkok, Thailand during the dry season of 1987. Net radiation and soil heat flux were measured while latent heat flux was calculated from evapotranspiration measured with a 1 m. X 1 m. lysimeter. From the other energy balance components, sensible heat flux was estimated. Soil heat flux comprised a small fraction of Rn (<5%) , and therefore, can be considered negligible in the total energy balance of the field. Latent heat flux consumed the major portion of the energy supplied by net radiation during almost all periods of the crop duration. This caused consumption of energy from the adverted sensible heat into the field which started during the crop development stage and was indicated by negative sensible heat flux values calculated that time on. An average ratio of LE/Rn of 1. 31 for the season was estimated. Sensible heat advection remained nearly stable until the maturation period when maximum average sensible heat flux was estimated at -6. 07 MJ/m2 -day. Effects of the drying periods were observed in terms of reduced number of tillers, decrease in leaf area index, dry matter production and grain yield of the rice crop. |
| Year | 1987 |
| Type | Thesis |
| School | School of Environment, Resources, and Development (SERD) |
| Department | Other Field of Studies (No Department) |
| Academic Program/FoS | Agricultural and Food Engineering (AE) |
| Chairperson(s) | Jensen, Jens Raunso |
| Examination Committee(s) | Mizutani, Masakazu ;Murty, V.V.N ;Nielsen, Jens Moller |
| Scholarship Donor(s) | DAAD, Federal Republic of Germany |
| Degree | Thesis (M.Eng.) - Asian Institute of Technology, 1987 |