Performance of system of rice intensification (SRI) under different weed control methods, water management and seedling numbers in winter-spring season in Thai Nguyen Province, Vietnam | |
| Author | Nguyen Ngoc Quynh |
| Call Number | AIT Thesis no.AS-15-04 |
| Subject(s) | Rice--Weed control--Vietnam Water-supply--Vietnam--Management Rice--Planting--Vietnam |
| Note | A thesis submitted in partial fulfillment of the requirements for the degree of Master of Science in Agricultural Systems and Engineering, School of Environment, Resources and Development |
| Publisher | Asian Institute of Technology |
| Series Statement | Thesis ; no. AS-15-04 |
| Abstract | Rice is the staple food for more than half of world population, including Vietnam. From the point of the most five countries under impact of climate change, the adaptation for rice has taken a specific consideration from Vietnamese government and many Non - Governmental Organization. The system of rice intensification (SRI) was developed in 1980s by Father Henri de Lauanie, which has shown many advantages over conventional practices such as: save seeds, use less water, use less agro - chemical, redu ce the GHG emission, reduce the use of nitrogen fertilizer, and provide more yield and economic benefit to farmers. SRI has been introduced to Vietnam since 2003; more than one million of fa rmers have applied all over 22 Provinces up to now. However, the performance of rice, especially root growth, under different SRI techniques as well as the impact of SRI techniques on soil characteristics have not been studied yet. This study was conducted in Thai Nguyen Province, Vietnam to investigate the effects of SRI practices on rice growth in winter - spring season of 2015. It was found that it is possible to apply SRI techniques on rice in winter - spring season. There are independent and interactive effects of water management, weeding, and number of seedling on rice grown under SRI. The intermittent irrigation, cono - weeder, and single seedling increased the root growth, which expressed by enhancing the number of root per hill, root length per hill, dry matter of roots in deeper soil level. In addition, the yield components of SRI techniques were higher than conventional techniques. The numbers of panicle per m 2 , number of seeds per panicle, percentage of filled seeds, seed weight were higher in SRI fields than conventional fields; as a result , the yield increased. The intermittent irrigation increased rice yield by 14. 8 % compared with the control ; cono - weeder enhanced 5% yield, and 12% compared to local weeder and weeding by hand, respectively. Besides, single seedling improved 11.9% rice yield in comparison to three seedlings per hill. Moreover, intermittent irrigation improved soil fertility, in which amount of available Nitrogen, available Phosphorus, and exchangeable Potassium was higher in intermittent fields than conventional fields. Intermittent irrigation combined with cono - weeder, and single seedlings per hill are recommended to apply in the rice cultivation because of their advantages in both above and under - ground growth. |
| Year | 2015 |
| Corresponding Series Added Entry | Asian Institute of Technology. Thesis ; no. AS-15-04 |
| 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) | Datta, Avishek |
| Examination Committee(s) | Mishra, Abha;Shrestha, Sangam;Hoang Van Phu |
| Scholarship Donor(s) | Deuscher Akademischer Austausch Dienst (DAAD), Germany;AIT Fellowship |
| Degree | Thesis (M. Sc.) - Asian Institute of Technology, 2015 |