한국작물학회지 (KOREAN JOURNAL OF CROP SCIENCE)
- 제44권3호
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- Pages.236-242
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- 1999
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- 0252-9777(pISSN)
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- 2287-8432(eISSN)
Effect of Early Seeding on Seedling Establishment and Yield in Direct Dry Seeding Rice at Honam Plain Area of Korea
- Kim, Sang-Su (National Honam Agricultural Experiment Station, RDA) ;
- Back, Nam-Hyun (National Honam Agricultural Experiment Station, RDA) ;
- Chot, Min-Gyu (National Honam Agricultural Experiment Station, RDA) ;
- Choi, Weon-Young (National Honam Agricultural Experiment Station, RDA) ;
- Park, Hong-Kyu (National Honam Agricultural Experiment Station, RDA) ;
- Kim, Bo-Kyeong (National Honam Agricultural Experiment Station, RDA) ;
- Shin, Hyun-Tak (National Honam Agricultural Experiment Station, RDA) ;
- Cho, Soo-Yeon (National Honam Agricultural Experiment Station, RDA)
- 발행 : 1999.09.01
초록
To examine the seedling stand and growth as affected by early seeding dates of dry direct seeded rice in the Honam plain area of Korea, Dongjinbyeo was seeded at six seeding dates from early March to late April in rice fields of silty loam soil(Jeonbuk series) at the National Honam Agricultural Experiment Station (NHAES) for two years, 1996 and 1998. Seedling stand decreased slightly. with an early seeding date, but it produced more than the optimum seedling number except for the seeding of 25 March in 1996. Days to emergence was significantly longer, as seeding date was earlier, and days to emergence by early seeding was shortened only by 8 days because the mean air temperature was lower in 1996 than average, while in 1998, the reduction effect was nine to twenty five days because the mean air temperature was higher than average. In early seeding, various weeds occurred at the emergence date of rice and dominant weeds were Alopecurus aequailis, Ludwigia prostata and Rorippa islandica. NH