KOREAN JOURNAL OF CROP SCIENCE (한국작물학회지)

The Korean Society of Crop Science (한국작물학회)
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Growth and Yield Response of Rice Cultivars to Different Night illumination Intensities

야간조명 광도에 따른 벼 품종별 생육 및 수량 반응

  • Published : 2002.12.01
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Abstract

This experiment was conducted to investigate the response of rice growth and grain yield to night illumination. Three cultivars Heugjubyeo (early maturing), Hwaseongbyeo (medium maturing), and Ilpumbyeo(mid-late maturing) were tested under different light intensities ranging 1.0 to 20.0 lux (0.3 to 5.6 $1\mu\textrm{W}$ $cm^{-2}$). Awn length of all cultivars became longer as night illumination intensity increased; 4.09 cm under 10-20 lux compared to 1.93cm under 2 lux in Hwaseongbyeo. However culm and spike length ere not affected by night illumination. Night illumination delayed flowering by 3 days in Heugjinjubyeo, 5 days in Hwaseongbyeo, and 9 days in Ilpumbyeo at 10-20 lux compared to that at 2 lux. Grain yield was reduced by 10.0% in Heugjinjubyeo, 17.7% in Hwaseongbyeo, and 20.7% in Ilpumbyeo at 10-20 lux compared to 2 lux condition.

산업의 발달로 농경지 주변에 야간조명이 증가되고 있어, 야간조명 광도에 따른 벼 생육 반응과 수량의 영향을 구명하고자 조생종인 흑진주벼, 중생중인 화성벼, 중만생종인 일품벼를 공시하여 야간조명 광도 1.0-20.0lux(0.3-5.$1\mu\textrm{W}$ $cm^{-2}$)에서 수행한 시험결과를 요약하면 다음과 같다. 1. 간장과 수장은 야간조명 광도간에 큰 차이가 없었으나, 망장은 야간조명 광도가 높을수록 증가되었고, 특히 화성벼의 망장은 야간조명 광도 2lux 이하에서는 1.93cm이었으나, 10-20 lux에서는 4.09cm로 현저히 길어졌다. 2. 출수는 야간조명 광도가 높을수록 지연이 심하였으며, 품종별로는 야간조명 광도 2 lux 이하에 비하여 10-20 lux에서 흑진주벼는 3일, 화성벼는 5일, 일품벼는 9일이 지연되어, 일품벼 ＞ 화성벼 ＞ 흑진주벼 순으로 지연이 심하였다. 3. $m^2$당 수수는 야간조명 광도가 높을수록 현저하게 감소되어 화성벼와 일품벼는 유의한 차이가 있었다. 4. 쌀 수량은 야간조명 광도 2 lux 이하에 비하여 10-20 lux에서는 조생종인 흑진주벼는 10.0%, 중생종인 화성벼는 17.7%, 중만생종인 일품벼는 20.7%가 감소되었다.

Keywords

References

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