| Author | Dhakal, Subesh |
| Call Number | AIT Thesis no.CC-19-01 |
| Note | A thesis submitted in partial fulfillment of the requirements for the degree of Master of science in Climate Change and Sustainable Development, School of Environment, Resource and Development |
| Publisher | Asian Institute of Technology |
| Abstract | Resource inefficiency and water scarcity posed by climate change are the major problems faced by rice growing farmers, which reduce yield and increase production cost (PC). To solve the problem, advancement in water management, crop establishment and nutrient management is needed. Field experiment was conducted at the Asian Institute of Technology experimental field area to evaluate the response of RD57 lowland rice variety on the effects of different seeding rate (95, 125, 155 kg/ha), nitrogen (N) rates (0, 60, 120 kg/ha) and irrigation methods [safe alternate wetting and drying (AWD-15), and continuous flooding (CF)], on growth, yield, water productivity (WP), N use efficiency (NUE) and economic analysis. Seed rate 95 kg/ha and N rate of 120 kg/ha resulted in higher growth parameters. The application of N rates of 60 and 120 kg/ha had a similar response in terms of yield, 56% and 76% higher yield than no N application; increased WP by 57% and 74% than no N application; 43% and 47% higher benefit-cost ratio (B/C) than no N application. Seed rate 95 kg/ha resulted 46% higher yield, 42 % higher WP, 128 % higher agronomic NUE and 59% B/C than seed rate155 kg/ha, whereas no significant difference to seed rate 125 kg/ha. AWD-15 saved 43% of water, reduced 7% PC with no yield reduction and increased WP by 68%. Thus, for higher yield, greater WP, more NUE and less PC, seed rate of 95 kg/ha and application of 60 kg N/ha under AWD-15 can be recommended under similar condition |
| Year | 2019 |
| Type | Thesis |
| School | School of Environment, Resources, and Development (SERD) |
| Department | Department of Energy and Climate Change (Former title: Department of Energy, Environment, and Climate Change (DEECC)) |
| Academic Program/FoS | Climate Change and Sustainable Development (CC) |
| Chairperson(s) | Datta, Avishek ; |
| Examination Committee(s) | Kuwornu, John K.M.;Bhujel, Ram C. ;Agarwal, Anshul ; |
| Scholarship Donor(s) | Her Majesty the Queen’s Scholarships (Thailand) ; |