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- Title
GRAIN YIELD AND ENVIRONMENTAL IMPACTS OF ALTERNATIVE RICE (ORYZA SATIVA L.) ESTABLISHMENT METHODS IN MYANMAR.
- Authors
T., HTWE; K., TECHATO; P., CHOTIKARN; S., SINUTOK
- Abstract
Field experiments were conducted in the summer rice growing season of 2019 in Myanmar, to examine the grain yield and environmental impacts of rice under two alternative crop establishment methods: system of rice intensification (SRI) and modified SRI (MSRI), and two conventional methods: farmers’ practices (FP) and direct seeded rice (DSR). A randomized complete block design with five replications was used. In the present study, the leaf area index (LAI) with all tested methods was not significantly different at flowering and harvesting stages. Grain yield and the soil and plant analysis development (SPAD) reading at flowering stage did not significantly differ among the three transplanted methods. However, DSR showed significantly lower yield than FP and MSRI. This reduction might be due to shorter panicle length and fewer spikelets per panicle in DSR. The global warming potentials were 4066.94, 4067.08, 4475.75 and 4136.74 kg CO2 eq ha-1 for SRI, MSRI, FP and DSR, respectively. MSRI emitted less greenhouse gas (GHG) than FP with statistically similar grain yield, indicating that it could be a better alternative to other methods. In addition, somewhat closer spacing with two seedlings per hill (MSRI) can further enhance rice yield with higher resource use efficiency in Myanmar or similar agroclimatic regions.
- Subjects
MYANMAR; GRAIN yields; LEAF area index; RICE; RICE yields; ALTERNATIVE crops; SOIL testing; GLOBAL warming
- Publication
Applied Ecology & Environmental Research, 2021, Vol 19, Issue 1, p507
- ISSN
1589-1623
- Publication type
Article
- DOI
10.15666/aeer/1901_507524