Abstract
최근 육성된 고품질 벼 품종인 보람찬, 호품 및 호농을 공시하여 질소 시비량(9, 18 kg/10a) 및 출수 직후 차광처리(50, 70%)에 의한 등숙기 일조부족이 광합성 특성 변화와 수량 및 수량구성형질 등에 미치는 영향을 검토한 결과를 요약하면 다음과 같다. 1. 등숙기 차광처리에 의해 Fv/Fm 및 SPAD값은 차광률이 높을수록 그 감소율이 적었으며, 질소 시비량을 증가에 따른 유의적인 변화는 없었다. 다른 품종과 달리 호농의 경우 18 kg 처리시 자연광에서 자란 시료에서도 감소율이 완만하게 나타났다. 2. 등숙기 차광처리에 의해 천립중과 수량은 차광에 따라 감소하였고, 차광률에 따라 더 높은 감소율을 보였다. 천립중은 세 품종 중 보람찬이 가장 많이 감소하는 경향을 보였다. 차광 70% 처리시 질소 시비량의 증수에 따라서 감소율이 더 급격히 나타나 등숙기 일조부족에 질소질 비료의 추가시용은 비효율적임을 알 수 있었다. 3. 등숙기 차광처리시 백미 단백질 함량은 증가하였고 50% 차광 보다 70% 차광에서 높았으며, 호농이 보람찬과 호품에 비해 단백질 함량의 변화가 적었다. 4. 등숙기 차광처리시 아밀로스 함량 변화는 감소하는 경향을 보였으며, 호농이 보람찬과 호품에 비해 변화가 적었다. 5. 등숙기 차광처리에 따른 쌀의 품위 분석 결과 보람찬과 호품은 차광에 의해 완전립 비율이 차광율 70%일 때 64.8-70.9%로 크게 감소하였는데 이는 분상질립의 증가로 인한 것으로 판단된다. Light intensity is one of the most important requirements for plant growth, affecting growth, development, survival, and crop productivity. Sunlight is the main energy source on Earth which is energy used by photosynthesis to convert light energy to chemical energy. In this study, the light use efficiency and photosynthetic characteristics of high-quality rice cultivars were evaluated after shading on ripening stage. For the study, we treated of three levels of shade (0, 50 and 70%) on rice at ripening stage and two levels of nitrogen (9 and 18 kg/10a) used three high yielding rice cultivars, such as Boramchan, Hopum, and Honong. The shade was given for the respective plots from heading up to harvesting. We were performed to determine growth survey, SPAD and chlorophyll fluorescence every 10 days interval after shading on ripening stage. At harvest stage, grain yield and yield components were determined. Results of analysis of the results representing the maximum photosynthetic efficiency of PSII, Fv/Fm, and SPAD were decreased by depending on the time at full sunlight. But shade treatments were not changed and a significant difference among cultivars did not appear. Compared with the full sunlight, shade treatments significantly delayed ripening rate and decreased rice quality of cultivated rice. Therefore, rice yield, can be reduced in proportion to the shading density is apparent, the rate of decrease was not observed difference between varieties, when protected from light 70%, and decreased to less than 50%. The adverse effects of low light intensity on the yield and yield components were not able to significantly minimize by the nitrogen level.
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Claims 10
Claim · model-written summary
Fv/Fm and SPAD declined over time under full sunlight.
- Taxon
- japonica rice
_by_Augustus_Binu.jpg?width=60)
Oryza sativa Japonica Groupt0 - Outcome
- Fv/Fm, and SPADe0
- Direction
- decreasede0
- Setting
- full sunlighte0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
_by_Augustus_Binu.jpg?width=500)
Verbatim
e0“Results of analysis of the results representing the maximum photosynthetic efficiency of PSII, Fv/Fm, and SPAD were decreased by depending on the time at full sunlight.”
t0“japonica rice”
Claim · model-written summary
Shading did not change these photosynthetic indicators.
- Taxon
- japonica riceOryza sativa Japonica Groupt0
- Treatment
- shade treatmentse0
- Outcome
- shade treatments were not changede0
- Direction
- not changede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“But shade treatments were not changed and a significant difference among cultivars did not appear.”
t0“japonica rice”
Claim · model-written summary
No significant cultivar difference appeared for the photosynthetic indicators.
- Taxon
- japonica riceOryza sativa Japonica Groupt0
- Outcome
- significant difference among cultivars did not appeare0
- Direction
- did not appeare0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“But shade treatments were not changed and a significant difference among cultivars did not appear.”
t0“japonica rice”
Claim · model-written summary
Shading delayed ripening rate compared with full sunlight.
- Taxon
- japonica riceOryza sativa Japonica Groupt0
- Treatment
- shade treatmentse0
- Outcome
- ripening ratee0
- Direction
- delayede0
- Comparator
- full sunlighte0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Compared with the full sunlight, shade treatments significantly delayed ripening rate and decreased rice quality of cultivated rice.”
t0“japonica rice”
Claim · model-written summary
Shading decreased rice quality compared with full sunlight.
- Taxon
- japonica riceOryza sativa Japonica Groupt0
- Treatment
- shade treatmentse0
- Outcome
- rice qualitye0
- Direction
- decreasede0
- Comparator
- full sunlighte0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Compared with the full sunlight, shade treatments significantly delayed ripening rate and decreased rice quality of cultivated rice.”
t0“japonica rice”
Claim · model-written summary
Rice yield decreased as shading density increased.
- Taxon
- japonica riceOryza sativa Japonica Groupt0
- Treatment
- shading densitye0
- Outcome
- rice yielde0
- Direction
- reducede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Therefore, rice yield, can be reduced in proportion to the shading density is apparent, the rate of decrease was not observed difference between varieties, when protected from light 70%, and decreased to less than 50%.”
t0“japonica rice”
Claim · model-written summary
Yield decrease did not differ among varieties.
- Taxon
- japonica riceOryza sativa Japonica Groupt0
- Outcome
- rate of decreasee0
- Direction
- not observed differencee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Therefore, rice yield, can be reduced in proportion to the shading density is apparent, the rate of decrease was not observed difference between varieties, when protected from light 70%, and decreased to less than 50%.”
t0“japonica rice”
Claim · model-written summary
Nitrogen level did not significantly mitigate low light effects on yield and yield components.
- Taxon
- japonica riceOryza sativa Japonica Groupt0
- Treatment
- nitrogen levele0
- Outcome
- yield and yield componentse0
- Direction
- not able to significantly minimizee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The adverse effects of low light intensity on the yield and yield components were not able to significantly minimize by the nitrogen level.”
t0“japonica rice”
Claim · model-written summary
Shading increased white rice protein content, more at 70% than 50% shade.
- Taxon
- japonica riceOryza sativa Japonica Groupt0
- Treatment
- 차광처리e0
- Outcome
- 백미 단백질 함량e0
- Direction
- 증가e0
- Comparator
- 50% 차광e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“등숙기 차광처리시 백미 단백질 함량은 증가하였고 50% 차광 보다 70% 차광에서 높았으며, 호농이 보람찬과 호품에 비해 단백질 함량의 변화가 적었다.”
t0“japonica rice”
Claim · model-written summary
Shading tended to decrease amylose content.
- Taxon
- japonica riceOryza sativa Japonica Groupt0
- Treatment
- 차광처리e0
- Outcome
- 아밀로스 함량e0
- Direction
- 감소e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“등숙기 차광처리시 아밀로스 함량 변화는 감소하는 경향을 보였으며, 호농이 보람찬과 호품에 비해 변화가 적었다.”
t0“japonica rice”
The same questions in other papers
shade · quality: postharvest · Oryza sativa (rice)Positive and negative results
2 in the opposite direction
- positive
- positive
nitrogen · yield · Oryza sativa (rice)Positive and negative results
241 papers in the same direction as this paper · 1,803 in the opposite direction
- no effect
- positive
- positive
2,041 papers more in this group
See all 2,045 papers →shade · quality: general · Oryza sativa (rice)Results agree
3 papers in the same direction as this paper
- negative
- negative
- negative
Claims are grouped by organism, treatment and what was measured or targeted. A paper counts as positive when any of its claims in the group is positive.