Effects of water regimes and plant densities on rice (Oryza sativa L.) growth under System of Rice Intensification (SRI) management | |
| Author | Mishra, Abha |
| Call Number | AIT Diss. no.AE-08-01 |
| Subject(s) | Rice--Processing Water in agriculture |
| Note | A thesis submitted in partial fulfilment of the requirements for the degree of Doctor of Philosophy, School of Environment, Resources and Development |
| Publisher | Asian Institute of Technology |
| Series Statement | Dissertation ; no. AE-08-01 |
| Abstract | This dissertation is based on the research and action research carried out with two major components of System of Rice Intensification (SRI) management principles--water regimes and planting densities, which have gene rated lot of interest among Research and Development (R&D) communities. A series of ‘on-station’ and ‘on-farm’ trials were conducted from 2005 to 2007 at Asian Institute of Technology (AIT), Thailand in a semi- field and open field condition, and at 6-Farmer s’ Field School (FFS) sites and two central locations in Prey Veng, Cambodia, using Participatory Action Research (PAR). The major objectives were: (i) to investigate the effect of water regimes and planting densities on rice root and shoot growth under SR I method and (ii) to strengthen farmers’ and trainers’ capacity for designing, conducting and evaluating field experiments for generation of location-specific management practices. At AIT, experiments were conducted in nursery seedbeds. After transplanting, the rice seedlings’ root and shoot characteristics and their contribution to the production of tillers and dry matter was studied in semi and ope n field conditions. Experiments conducted on seedbeds revealed that SRI seedbed was superior to wet seedbed for producing vigorous and healthy seedlings of 2-3 leaf stage in 10-12 days. The younger and vigorous seedling transplant had better synergies with non-flooded water regimes when nutrient and water was not a limiting factor. This early age (2-3 leaf stage) is the stage at which transplanting is recommended for SRI. |
| Year | 2008 |
| Corresponding Series Added Entry | Asian Institute of Technology. Dissertation ; no. AE-08-01 |
| Type | Dissertation |
| 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) | Salokhe, V. M.; |
| Examination Committee(s) | Shivakoti G.;Preeda Parkpian;Ketelaar, J. W.; |
| Degree | Thesis (Ph.D.) - Asian Institute of Technology, 2008 |