| Author | Chann Sinath |
| Call Number | AIT Thesis no.AE-96-30 |
| Subject(s) | Rice--Cambodia
|
| Note | A thesis submitted in partial fulfillment of the requirements for the degree of Master of
Science |
| Publisher | Asian Institute of Technology |
| Abstract | This study is related to the biological constraints on dry season flood recession rice in
southeastern Cambodia. Its essential objectives are: (1) to study the yield gap between farm
and on-farm experiment for rice production during dry season, (2) to evaluate the possible
reason for the yield gap, (3) to determine the possible ways to eliminate the biological
constraints in rice yield. The data in this study was collected from a field experiment, and
farm interviews including crop cut.
The experimental results show that the important contributor to the yield gap was
fertilizer. But the fertilizer application without the pesticide application did not increase yield
significantly, because insect damages play a second role in term of contribution to yield gap.
There is no weed effect on yield gap because the experimental field was flood every year
during the wet season. Yield was suppressed by severe rat damage.
The result from the farm interview and crop cut survey show that the major factors of
biological constraints were identified as rats, insects, diseases, and a few trouble weeds for the
very early flood recession area. All the factors in biological constraint were rank by the
farmers. The insects damage as the most important constraint, following by rats, diseases and
weeds, respectively.
The results from both experiment and farm interview and crop cut have the gap
between the potential yield at the experimental field and at the actual farmer's practicing. This
is because the experiment did not include rat control.
Based on these results, the constraint experiment must include rodent control in the
management package and survey must include more details about the problems are facing by
the farmers. |
| Year | 1996 |
| Type | Thesis |
| School | School of Environment, Resources, and Development (SERD) |
| 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) | Tinsley, R.L.; |
| Examination Committee(s) | Murty, V.V.N;Demaine, Harvey;Hansen, G.K.; |
| Scholarship Donor(s) | Swedish International Development
Cooperation Agency (SIDA); |
| Degree | Thesis (M.Sc.) - Asian Institute of Technology, 1996 |