| Author | Shinde, Dilip |
| Call Number | AIT Thesis no. AE-87-11 |
| Subject(s) | Plant-water relationships
|
| Note | A thesis submitted in partial fulfillment of the requirements for the degree of Master of Science, School of Environment, Resources and Development |
| Publisher | Asian Institute of Technology |
| Abstract | A field experiment was conducted
consumption mechanism on a small paddy field
The study was conducted at REC, AIT using
RD23 and RD7.
to study the water
during the dry season.
two paddy varieties viz,
The results obtained showed different water requirement for RD23
and RD7. The plots having nor mal water supply for complete growth
period starting 10 DAT with a ponding depth of average Scm showed a
water requirement of 758.8 and 986 .3 mm for RD23 and RD7 respectively .
On the other hand plots having mid-season drainage just before heading
for a period of 6 days showed a water requirement of 880.3 and 1712.5 mm
for RD23 and RD7 respectively. The ETa values observed for whole
growth period after 10 DAT were 510.0 and 657.4 mm respectively
for RD23 and RD7 .
Water losses were mainly from border percolation through paddy
bunds averaging 3.0 mm/day for normal plots but in case of plots having
mid-season drainage it went up to 9 .5 mm/day. It was observed that
coating of bunds by mud or clay greatly helps in reducing the border
percolation and water requirement and maintains constant depth of water
for longer time . The plots having mid-season drainage showed a higher
water requirement resulting from greater BP after mid-season drainage.
On the other hand increase in yield was found to be only @ 5% . The
crop coefficients (Kc=ETa/ETo) estimated by Pan method were 1 .33 , 1.79,
1.56 and 1 .38 , 2.19, 2.33 for RD23 and RD7 at vegetative, reproductive
and ripening stages respectively. In case of modified Penman the Kc
values were 0.97, 1.41, 1.37 and 1 . 02, 1.73, 2.06 for RD23 and RD7 for
the same stages. The Kcl (ETa/Ep) values were found to be 0.87, 1.18,
1.09 for RD23 and 0.91, 1 .46, 1.63 for RD7 at vegetative, reproductive
and ripening stages respectively. The average pan coefficient estimated
by using modified Penman ETc was found to be 0.85. |
| 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) | Mizutani, Masakazu |
| Examination Committee(s) | Nielsen, Jens Moller ;Jensen, Jens Raunso ;Murty, V.V.N |
| Scholarship Donor(s) | The Government of Australia |
| Degree | Thesis (M.Sc.) - Asian Institute of Technology, 1987 |