| Author | Hakak, Mohd. Farooq |
| Call Number | AIT Thesis no.AE-80-19 |
| Subject(s) | Rice--Water requirements
|
| 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 | The field experiment of this study, was conducted at the Khlong Luang Rice Experimental Station, Bangkok, Thailand, to measure the water requirement of RDll and RD7 paddy varieties, using the water balance method
(water subsidence technique), during the dry season of 1980. Moreover, potential evapotranspiration during the paddy growing dry season was
estimated from meteorological data using empirical relations.
The results reveal thseepage at the total water consumption of RDll and RD7 paddy varieties, for their growth periods of 105 and 97 days after transplanting, was 808 mm with an average of 7.7 mm/day and 755 mm with an average of 7.8 mm/day respectively. The total amount of & percolation for growth periods of RDll and RD7 varieties was 318.6 mm with an average of 3.1 mm/day and 307.0 mm with an average of 3.2 mm/day respectively. The methods of estimating potential evapotranspiration by Penman
and Jensen-Raise empirical relations underestimated the actual evapotranspiration. The average values of Penman and Jensen-Raise potential evapotranspiration was found to be 5.1 and 5. 8 mm/day respectively. The daily values of Jensen-Raise method are close to the corresponding daily values
of pan evaporation and actual evapotranspiration. The crop growth coefficients averaged to 1.22, 1.35 and 1.52 for RDll and 1.23, 1.37 and 1.54 for RD7 varieties computed by pan, Jensen-Raise, and Penman values, respectively.
These coefficients will be helpful in predicting the actual evapotranspiration of paddy at different locations. The average values of pan coefficients by
using Penman and Jensen-Raise values were 0.81 and 0.91, respectively. A close correlation was found between the measured consumptive use and the computed consumptive use, for different growth stages of both varieties. |
| Year | 1980 |
| Type | Thesis |
| School | School of Environment, Resources, and Development |
| Department | Department of Food, Agriculture and Natural Resources (Former title: Department of Food Agriculture, and BioResources (DFAB)) |
| Academic Program/FoS | Agricultural and Food Engineering (AE) |
| Chairperson(s) | Apichart Anukularmphai |
| Examination Committee(s) | Olesen, Svend Elsnab ; Eppendorfer, W.H.
|
| Scholarship Donor(s) | The Government of Belgium |
| Degree | Thesis (M.Eng.) - Asian Institute of Technology, 1980 |