| Author | Luong Van Nga |
| Call Number | AIT Thesis no.AS-06-16 |
| Subject(s) | Rice--Planting
|
| Note | A thesis submitted in partial fulfillment of the requirements for the
degree of Master of Science, School of Environment, Resources and Development
|
| Publisher | Asian Institute of Technology |
| Series Statement | Thesis ; no. AS-06-16 |
| Abstract | Dry matter production and its partitioning play an important role in determining grain yield of rice. A field experiment was conducted at the Agricultural Systems Research Farm, Asian Institute of Technology during November 20, 2005 until end of February 2006 to determine the dry matter production and partitioning in rice under different water and nutrient management practices and seedling density. Three water management methods (viz. Continuous flooding, alternate wetting and drying and conventional water management), three nutrient management methods (viz. chemical fertilizer, organic manure and combined supply of nutrient by organic manure and chemical fertilizer) and two seedling densities (viz. one and two seedlings transplanted per hill) were tested. This study showed that alternate wetting and drying markedly improved root morphological characteristics, root and shoot weight, and total dry matter weight compared to continuous flooding and conventional water management. This resulted in significant increases in the number of panicles per hill, total grain and filled grain number per panicle and as a result grain yield. Combined supply of nutrients using organic manure and chemical fertilizer had enhanced the performance of rice plant and increased grain yields compared to chemical fertilizer alone and organic manure alone. The beneficial effects of integrated use of organic and chemical fertilizers on dry matter production and grain yield were significantly (P < 0.05) increased by the water management method of alternate wetting and drying. With minimized water input in alternate wetting and drying, the highest water productivity was in alternate wetting and drying combined with chemical fertilizer plus organic manure. The alternate wetting and drying combined with integrated application of chemical fertilizer and organic manure showed the highest nitrogen (N) content in root and shoot and N uptake by rice plants. Soil pH, SOM, total N, total and available P and K contents in alternate wetting and drying, combined supply of nutrient by organic manure and chemical fertilizer were generally higher than the other treatments |
| Year | 2006 |
| Corresponding Series Added Entry | Asian Institute of Technology. Thesis ; no. AS-06-16 |
| 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 Aquatic Systems(AS) |
| Chairperson(s) | Ranamukhaarachchi, S.L.; |
| Examination Committee(s) | Clemente, R.S. ;Samarakoon, Lal ; |
| Scholarship Donor(s) | Ministry of Education and Training
Scholarships
Vietnamese Government ; |
| Degree | Thesis (M.Sc.) - Asian Institute of Technology, 2006 |