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http://dx.doi.org/10.5660/WTS.2018.7.3.171

Emergence Characteristics of Weedy Rice under Flooding depth  

Hwang, Woon-Ha (National Institute of Crop Science (NICS), RDA)
Jeong, Jae-Hyeok (National Institute of Crop Science (NICS), RDA)
Lee, Hyeon-Seok (National Institute of Crop Science (NICS), RDA)
Park, Tae-Sun (National Institute of Crop Science (NICS), RDA)
Yang, Seo-Young (National Institute of Crop Science (NICS), RDA)
Choi, In-Bae (National Institute of Crop Science (NICS), RDA)
Choi, Kyung-Jin (National Institute of Crop Science (NICS), RDA)
Publication Information
Weed & Turfgrass Science / v.7, no.3, 2018 , pp. 171-179 More about this Journal
Abstract
We investigated changes of weedy rice emergence and seed condition under different flooding depth condition using 100 accessions of weedy rice germplasm collected in South Korea. In 1 cm of soil buried depth condition, 54 and 57% of emergence was reduced under 5 and 10 cm of flooding depth conditions respectively compared to non-flooding condition. In 5 cm of soil buried depth condition, 66 and 84% of emergence was reduced under 5 and 10 cm of flooding depth conditions respectively compared to non-flooding condition. The 94% of weedy rice germplasm showed less than 10% of emergence rate at 10 cm of flooding depth condition. In flooding condition, seed number, which germinated but did not emerged, was increased. As a result of analyzing the correlation between effective accumulated temperature and seed condition, dead seed rate increased and germination rate decreased depending on effective accumulated temperature. However, emergence rate did not show significant correlation with growth temperature condition under flooding condition such as 5 or 10 cm of water depth, it decreased according to flooding period. In order to reduce the emergence rate of weedy rice, longer than 21 days of flooding might be needed.
Keywords
Emergence; Soil depth; Temperature; Weedy rice;
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Times Cited By KSCI : 1  (Citation Analysis)
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