Effects of planting date and nitrogen application on yield and water productivity of rice under alternate wetting and drying irrigation | |
| Author | Han Ni Soe |
| Call Number | AIT Thesis no.AS-19-01 |
| Subject(s) | Nitrogen in agriculture Crops and nitrogen Planting time |
| Note | A Thesis submitted in partial fulfillment of the requirements for the degree of Master of Science in Agricultural Systems and Engineering |
| Publisher | Asian Institute of Technology |
| Abstract | Rice production has been challenged to achieve higher productivity with resource use efficiency in a sustainable way. Water saving-practice and effective nitrogen (N) application strategies are mainly emphasized on production of rice. A field experiment was conducted to explore the effects on plant growth, yield, yield components, nitrogen use efficiency (NUE) and water productivity (WP) of RD57 rice variety with wet-direct seeded method. It was laid out in a randomized complete block design (RCBD), replicated thrice with three planting dates (10 Nov, 20 Nov, and 30 Nov), three N levels (0, 60 and 120 kg ha-1 ), and two water management (AWD15 and CF). Agronomic and physiological parameters were significantly affected by planting date and N rate, but it was not affected by water management, except shoot biomass. The interaction effects of planting date with N level were observed on plant height, number of tiller m-2 , LAI at maturity and shoot biomass and N level with water management were on the number of tiller m-2 and shoot biomass. Grain yield and yield attributes were affected by planting date and N level significantly. There were interactions between planting date and N rate on number of panicle m-2 , filled grain percentage and grain yield. Grain yield also had a significant interaction of N level with water management. Grain yields resulted from planting date on 10 and 20 Nov were higher at the N rate of 120 kg ha-1 and AWD15 produced 15.2% higher in grain yield, 44.6% saved in total water input and 52.7% increase in water productivity than CF. Agronomic nitrogen use efficiency (AEN) and partial factor productivity (PFPN) were affected by planting date and water management, whereas N level affected to only PFPN but not AEN. Overall, the crop planting date on 10 and 20 Nov at the N application rate of 120 kg ha-1 resulted in better performance for grain yield, NUE and WP under AWD15 irrigation practice. |
| Year | 2019 |
| 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 Systems and Engineering (ASE) |
| Chairperson(s) | Datta, Avishek |
| Examination Committee(s) | Kuwornu, John K.M.; Salin, K.R. |
| Scholarship Donor(s) | Deutscher Akademischer Austauschdienst (DAAD);AIT Fellowship |
| Degree | Thesis (M. Sc.) - Asian Institute of Technology, 2019 |