Grain yield and water productivity of lowland rice under different cultivation methods and alternate wetting and drying moisture regimes | |
| Author | Giri, Suman |
| Call Number | AIT Thesis no.AS-18-03 |
| Subject(s) | Wheat--Yields Rice--Planting Rice--Water requirements |
| 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 | Fresh water share for agriculture is increasingly becoming scarce, and lowland rice (Oryza sativa L.) cultivation will be affected as it is considered as one of the major users of fresh water. Increasing water productivity in rice is present and future necessity for which rice cultivation methods and moisture regimes are reported to play important role. A field experiment was conducted at the Asian Institute of Technology (AIT), Thailand farm between December 2017 and March 2018 to see the performance of lowland rice under different cultivation methods and moisture regimes. Lowland rice variety, RD 57 was cultivated under two different cultivation methods: dry direct seeding (DDS) and transplanting (TP) and three different moisture regimes: continuous flooding(CF), alternate wetting and drying at 15 cm water threshold level below soil surface (AWD15) and alternate wetting and drying at 30 cm water threshold level below soil surface (AWD30). Two-way interaction between Moisture (M) and Cultivation methods (C) was not significant for yield and water productivity (WP). However, moisture as treatment affected yield and WP of RD 57. Highest yield (5785 kg ha-1 ) was observed for AWD15 treatment which was around 44% and 2% higher than AWD30 and CF treatments respectively. Similarly, AWD 15 treatment gave highest WP (0.85 kg m-3 ) which was 42% and 41% higher as compared to WP at CF (0.49 kg m-3 ) and AWD30 (0.5 kg m-3 ) respectively. These results suggested that AWD could be used for better yield and WP for lowland rice. |
| Year | 2018 |
| 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.;Anal, Anil Kumar |
| Scholarship Donor(s) | Asian Development Bank-Japan Scholarship Program (ADB-JSP) |
| Degree | Thesis (M.Sc.) - Asian Institute of Technology, 2018 |