Abstract
국내 가뭄 조건에서의 벼 품종별 재배안정성을 평가하기 위한 인위적인 가뭄 처리 조건(수리불안전답 조건)에서 생육 특성과 쌀수량 조사하고 쌀수량 감소 요인을 분석한 결과는 다음과 같다. 1. 수리불안전답 조건에 의한 경수 및 이삭수 감소율은 품종에 따라 각각 10.7%에서 33.1%와 10.5%에서 30.1%였으며, 공시품종 중 '새일미', '일미'가 경수 및 이삭수 변화가 적었으며, '오대'와 '운광', '추청' 품종에서 경수와 이삭수 감소가 크게 나타났다. 2. 수리불안전답 조건에서의 쌀수량은 품종에 따라 수리안전답 조건보다 9.9%에서 33.3% 감소하였으며, 쌀수량 감소가 적은 품종은 '새일미'와 '주남', '일미'였으며, 감소율이 큰 것으로 조사된 품종은 '오대'와 '칠보', '호품' 등 이였다. 3. 수리불안전답 조건에 의한 생육초기 경수 발달 부진과 이의 영향에 의한 이삭수 감소가 쌀수량 감소에 가장 큰 영향을 준 것으로 분석되었다. 4. 본 연구에서 수리불안전답 조건에서의 쌀수량 감소를 분석한 결과, 국내 기상조건에서 발생할 수 있는 가뭄은 생육후기보다 생육초기의 경수 발달에 크게 영향을 주는 것으로 확인되었다. 따라서 농업용수 공급이 원활하지 않는 수리불안전답의 경우 가뭄에 대비하기 위하여 '새일미'와 '일미', '일품' 품종 같은 가뭄에 대한 재배안정성이 우수한 품종을 재배하는 것이 적당하다고 판단된다. Drought caused by global climate change is one of serious problems for rice cultivation. However, it was little reported the impact of drought on rice cultivation in Korea. In here, to assess impact of drought on rice varieties in Korean climate condition, growth characteristics and yield components of rice were compared on irrigated and partially irrigated rice paddy field. First, we have chosen 11 rice varieties including 'Saeilmi' and 'Shindongjin' which are widely cultivated in Korea. For partially irrigated rice paddy treatment, we have withheld irrigation from 25 days after transplanting and water supply was totally dependent on rainfall for rice cultivation. When we examined early plant height and tiller number of these varieties on partially irrigated rice paddy were reduced 1.6% to 18.4% and 10.4% to 33.1%, respectively, and these reduction rate were highly correlated with yield loss in our experimental conditions. Among rice yield components, panicle number was decreased 10.5% to 30.1% according to rice varieties and reduced panicle number was highly correlated with yield loss. Grain number per panicle, grain filling rate and 1,000 seeds weight did not have correlation with yield loss of rice varieties. These result means that growth stage, especially the tillering stage, is seriously affected by drought on rice cultivation in Korea. And we suggest that 'Saeilmi', 'Ilmi' and 'Ilpum' are good for rice cultivation on drought prone rice field in Korea.
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Claims 8
Claim · model-written summary
Early plant height was reduced by 1.6% to 18.4% on partially irrigated rice paddy compared with irrigated paddy.
- Taxon
- rice
Oryza sativae0 - Treatment
- partially irrigated rice paddye1
- Outcome
- early plant heighte0
- Direction
- reducede0
- Value
- 1.6% to 18.4%e0
- Comparator
- irrigated rice paddy fielde2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“When we examined early plant height and tiller number of these varieties on partially irrigated rice paddy were reduced 1.6% to 18.4% and 10.4% to 33.1%, respectively”
e1“For partially irrigated rice paddy treatment, we have withheld irrigation from 25 days after transplanting”
e2“were compared on irrigated and partially irrigated rice paddy field”
Claim · model-written summary
Tiller number was reduced by 10.4% to 33.1% on partially irrigated rice paddy compared with irrigated paddy.
- Taxon
- riceOryza sativae0
- Treatment
- partially irrigated rice paddye1
- Outcome
- tiller numbere0
- Direction
- reducede0
- Value
- 10.4% to 33.1%e0
- Comparator
- irrigated rice paddy fielde2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“When we examined early plant height and tiller number of these varieties on partially irrigated rice paddy were reduced 1.6% to 18.4% and 10.4% to 33.1%, respectively”
e1“For partially irrigated rice paddy treatment, we have withheld irrigation from 25 days after transplanting”
e2“were compared on irrigated and partially irrigated rice paddy field”
Claim · model-written summary
Reduction rates of early plant height and tiller number were highly correlated with yield loss in the experimental conditions.
- Taxon
- riceOryza sativae0
- Outcome
- yield losse1
- Qualifier
- reduction ratee1
- Setting
- our experimental conditionse1
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“When we examined early plant height and tiller number of these varieties on partially irrigated rice paddy were reduced 1.6% to 18.4% and 10.4% to 33.1%, respectively”
e1“these reduction rate were highly correlated with yield loss in our experimental conditions”
Claim · model-written summary
Panicle number decreased by 10.5% to 30.1% across rice varieties on partially irrigated rice paddy.
- Taxon
- riceOryza sativae0
- Treatment
- partially irrigated rice paddye1
- Outcome
- panicle numbere0
- Direction
- decreasede0
- Value
- 10.5% to 30.1%e0
- Comparator
- irrigated rice paddy fielde2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Among rice yield components, panicle number was decreased 10.5% to 30.1% according to rice varieties”
e1“For partially irrigated rice paddy treatment, we have withheld irrigation from 25 days after transplanting”
e2“were compared on irrigated and partially irrigated rice paddy field”
Claim · model-written summary
Reduced panicle number was highly correlated with yield loss in rice varieties.
- Taxon
- riceOryza sativae0
- Material
- rice varietiese0
- Outcome
- yield losse1
- Qualifier
- reduced panicle numbere1
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Among rice yield components, panicle number was decreased 10.5% to 30.1% according to rice varieties”
e1“reduced panicle number was highly correlated with yield loss”
Claim · model-written summary
Grain number per panicle, grain filling rate and 1,000 seeds weight showed no correlation with yield loss in rice varieties.
- Taxon
- riceOryza sativae0
- Treatment
- partially irrigated rice paddye1
- Outcome
- Grain number per panicle, grain filling rate and 1,000 seeds weighte0
- Direction
- no_changeinferrede0
- Qualifier
- yield losse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Grain number per panicle, grain filling rate and 1,000 seeds weight did not have correlation with yield loss of rice varieties”
e1“For partially irrigated rice paddy treatment, we have withheld irrigation from 25 days after transplanting”
Claim · model-written summary
Drought seriously affects the growth stage, especially the tillering stage, of rice cultivation in Korea.
- Taxon
- riceOryza sativae0
- Organ / stage
- tillering stagee0
- Treatment
- droughte0
- Outcome
- growth stage, especially the tillering stagee0
- Setting
- Koreae0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“These result means that growth stage, especially the tillering stage, is seriously affected by drought on rice cultivation in Korea”
Claim · model-written summary
Saeilmi, Ilmi and Ilpum are recommended for rice cultivation on drought-prone rice fields in Korea.
- Taxon
- riceOryza sativae0
- Material
- 'Saeilmi', 'Ilmi' and 'Ilpum'e0
- Outcome
- rice cultivation on drought prone rice fielde0
- Setting
- Koreae0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“And we suggest that 'Saeilmi', 'Ilmi' and 'Ilpum' are good for rice cultivation on drought prone rice field in Korea”
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