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KMID : 1098420040120030219
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Korean Journal of Medicinal Crop Science
2004 Volume.12 No. 3 p.219 ~ p.225
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Growth and Yield Characteristics by Tillering Sequence in Coix lachryma-jobi L. var. mayuen Stapf
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Lee Eun-Seob
Yoon Seong-Tak
Park Kyeong-Yeol
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Abstract
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This study was conducted to evaluate growth and yield characteristics and the contribution to the yield according to the emergent sequence of tiller under two planting density (60{times}15;cm,;60{times}25;cm) in Coix lachryma-jobi L. var. mayuen Stapf. The average culm length and number of rachillas of 60{times}25;cm planting density were 20 cm shorter and 4.7 higher, respectively, whereas seed setting position of 60{times}25;cm planting density was 1.7 nodes lower compared with 60{times}15;cm planting density. Culm length and culm diameter of each tiller became shorter and thinner as the tiller emerged later. Length of rachillas was longer, number of grains was higher and ripening rate was also higher in 60{times}25;cm planting density than those of 60{times}15;cm$ planting density, whereas 100 grain weight in 60{times}25;cm planting density was lower by 0.5 g compared with 60{times}15;cm planting density. Length of rachillas and number of grains according to the emergent sequence of tiller were shown shorter and lower as the tiller emerged later. The highest number of bract was obtained from the main culm in both planting densities. 100 grain weight according to the emergent sequence of tiller became lower as the tiller emerged later in 60{times}15;cm planting density, but there was no clear tendency in 60{times}25;cm planting density. Among 8 tillers, 5th tiller and 4th tiller of main culm contributed 84.4% to the yield in 60{times}15;cm planting density, while it was 84.1% in 60{times}25;cm planting density. Analysis of path coefficient to grain yield showed that direct effect was the highest in the number of grain per tiller followed by in the 100 grain weight and in ripening rate.
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KEYWORD
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Adlay, Coix lachryma-jobi L. var. mayuen Stapf, planting density, tillering sequence, growth, yield
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