다수성 품종 다산벼의 질소흡수 및 광합성이 분얼에 미치는 영향 (Characteristics of Tillering affected by Changes of Nitrogen Absorption and Assimilation in Dasanbyeo, a Tongil-Type High Yielding Rice Cultivar)

서지정보

· 발행기관 : 한국국제농업개발학회
· 수록지 정보 : 한국국제농업개발학회지 / 20권 / 2호 / 113 ~ 118페이지
· 저자명 : 김덕수, 최경진, 김선림, 송진, 정응기, 신진철, 서세정

초록

In Korean high yielding varieties developed by crosses between indica and japonica rice,
the most limiting factor for yield increase may be attributed to the less number of the tillers in the unit
area. The goals of this study is to find out the effect of the environmental factors as well as cultivation
practice on the development and increase of tillers of Dasanbyeo, the high yielding indica/japonica
hybrid cultivar. The effect of temperature was examined in the controlled phytotron condition with 6 different
temperatures, 15, 18, 22, 24, and 27℃, respectively. For all the experiment, the leading japonica
variety in Korea, Hwaseongbyeo, was used for the check cultivar for the comparison with Dasanbyeo.
Hwaseongbyeo showed a higher responses of tiller increase to the increased nitrogen rates then Dasanbyeo
with the increase ratios of 2.1-24.6% for the latter, and 26.8-61.5% for the former. The nitrogen
absorption of both the cultivars was increased with the increase of temperature up to 24oC, although the
less absorption at 27℃ than at 24℃ was also observed. When Dasanbyeo was grown at 15℃ to be
shifted to higher temperature, no absorption increase was found, while after growing 22℃ to be shift to
higher temperature, the increased absorption rate was observed. Dasanbyeo showed a lower assimilation
rate in unit area, although assimilation rate per plant showed different tendency. At low temperature
range of 15-18℃, Dasanbyeo had a lower assimilation rate than Hwaseongbyeo at the temperature
range of 22-24℃ while, the vice versa was observed at higher temperature range of 27℃.

영어초록

In Korean high yielding varieties developed by crosses between indica and japonica rice,
the most limiting factor for yield increase may be attributed to the less number of the tillers in the unit
area. The goals of this study is to find out the effect of the environmental factors as well as cultivation
practice on the development and increase of tillers of Dasanbyeo, the high yielding indica/japonica
hybrid cultivar. The effect of temperature was examined in the controlled phytotron condition with 6 different
temperatures, 15, 18, 22, 24, and 27℃, respectively. For all the experiment, the leading japonica
variety in Korea, Hwaseongbyeo, was used for the check cultivar for the comparison with Dasanbyeo.
Hwaseongbyeo showed a higher responses of tiller increase to the increased nitrogen rates then Dasanbyeo
with the increase ratios of 2.1-24.6% for the latter, and 26.8-61.5% for the former. The nitrogen
absorption of both the cultivars was increased with the increase of temperature up to 24oC, although the
less absorption at 27℃ than at 24℃ was also observed. When Dasanbyeo was grown at 15℃ to be
shifted to higher temperature, no absorption increase was found, while after growing 22℃ to be shift to
higher temperature, the increased absorption rate was observed. Dasanbyeo showed a lower assimilation
rate in unit area, although assimilation rate per plant showed different tendency. At low temperature
range of 15-18℃, Dasanbyeo had a lower assimilation rate than Hwaseongbyeo at the temperature
range of 22-24℃ while, the vice versa was observed at higher temperature range of 27℃.

참고자료

· 없음