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http://dx.doi.org/10.7740/kjcs.2012.57.2.151

Comparisons of Growth, Heading and Grain Filling Characteristics between Wet-hill-seeding and Transplanting in Rice  

Shon, Ji-Young (National Institute of Crop Science, RDA)
Lee, Chung-Kuen (National Institute of Crop Science, RDA)
Kim, Jun-Hwan (National Institute of Crop Science, RDA)
Yoon, Young-Hwan (National Institute of Crop Science, RDA)
Yang, Won-Ha (National Institute of Crop Science, RDA)
Choi, Kyung-Jin (National Institute of Crop Science, RDA)
Choi, Min-Gyu (National Institute of Crop Science, RDA)
Park, Hong-Kyu (National Institute of Crop Science, RDA)
Ko, Jong-Cheol (Research Policy Bureau, RDA)
Kim, Yeon-Gyu (National Academy of Agricultural Science, RDA)
Kim, Chung-Kon (National Institute of Crop Science, RDA)
Yang, Woon-Ho (National Institute of Crop Science, RDA)
Publication Information
KOREAN JOURNAL OF CROP SCIENCE / v.57, no.2, 2012 , pp. 151-159 More about this Journal
Abstract
Direct seeding of rice is a time- and laborsaving method, compared to machine transplanting. However, the area planted to direct-seeded rice is decreasing because of instability of seedling establishment, lodging, occurrence of weedy rice, and deterioration of grain quality. A newly developed wet-hill-seeding of rice, a type of direct seeding method, has shown features of growth similar to machine transplanted rice. This study was carried out to compare tillering pattern, heading characteristics and grain filling traits between transplanting and wet-hill-seeding in rice. Tillering of wet-hill-seeded rice was more vigorous than that of transplanted rice showing maximum tiller number 30~100% higher than transplanted rice. Wet-hill seeded rice showed later heading and shorter heading duration than transplanted rice. To find out the relationship between heading characteristics and grain filling traits, every panicle was tagged for flowering date, and the panicles on each heading date were inspected for grain filling traits. Wet-hill seeded rice and transplanted rice exhibited no significant difference in culm length, panicle length, the percentage of grain filling and perfect brown rice on each heading date during total heading period. Therefore, we conclude that wet-hill-seeding method is not inferior to machine transplanting in terms of seedling establishment, growth, grain filling and head rice yield.
Keywords
rice; wet-hill-seeding; tillering; heading; grain filling; head rice; direct-seeding; transplanting;
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