Abstract
The purpose of this paper is to clarify the compensation or reduction effect of drought–flood abrupt alternation (DFAA) events on the yield and yield components of rice ( Oryza sativa L.). The experiments, conducted in 2016 and 2017, were on three different drought and flood treatments and compared with normal irrigation conditions. Compared with the normal control group, the average yield reduction of the DFAA groups was 12.98% in 2016 and 29.94% in 2017, and the combination of heavy droughts and heavy flooding was the most unfavorable for yield. The reduction in grains per panicle and the total grain number was the main reason for yield reduction under DFAA stress. The damage in terms of the total grain number amounted to 18.84 and 17.82% in 2016 and 2017, respectively. The interannual differences in the thousand‐seed mass and seed setting rate increased in 2016 and decreased in 2017. Compared with the drought groups and the flood groups, the flood stress of the DFAA groups reduced the yield under drought conditions, and the decrease in the total grain number and panicles per barrel during the flood period was the main reason. The drought stress of the DFAA groups compensated the yield under flood conditions, mainly because the total grain number and seed setting rate increased during the drought period. Under long‐term light drought conditions, the panicles per barrel, grains per panicle, total grain number, thousand‐seed mass, and seed setting rate increased. Under long‐term heavy drought conditions, the panicles per barrel mainly increased.
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Claims 12
Claim · model-written summary
Compared with normal control, DFAA groups reduced rice yield by 12.98% in 2016.
- Taxon
- Rice
Oryza sativat0 - Treatment
- DFAA groupse1
- Outcome
- yielde1
- Direction
- decreaseinferrede1
- Value
- 12.98%e1
- Comparator
- normal control groupe1
- Setting
- in 2016e1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“on Rice Yield and Yield Components”
e1“Compared with the normal control group, the average yield reduction of the DFAA groups was 12.98% in 2016 and 29.94% in 2017”
Claim · model-written summary
Compared with normal control, DFAA groups reduced rice yield by 29.94% in 2017.
- Taxon
- RiceOryza sativat0
- Treatment
- DFAA groupse1
- Outcome
- yielde1
- Direction
- decreaseinferrede1
- Value
- 29.94%e1
- Comparator
- normal control groupe1
- Setting
- in 2017e1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“on Rice Yield and Yield Components”
e1“Compared with the normal control group, the average yield reduction of the DFAA groups was 12.98% in 2016 and 29.94% in 2017”
Claim · model-written summary
The combination of heavy drought and heavy flooding was the most unfavorable treatment for rice yield.
- Taxon
- RiceOryza sativat0
- Treatment
- combination of heavy droughts and heavy floodinge1
- Outcome
- yielde1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“on Rice Yield and Yield Components”
e1“the combination of heavy droughts and heavy flooding was the most unfavorable for yield”
Claim · model-written summary
Reduction in grains per panicle and in total grain number was the main reason for the yield reduction under DFAA stress.
- Taxon
- RiceOryza sativat0
- Treatment
- DFAA stresse1
- Outcome
- yield reductione1
- Qualifier
- The reduction in grains per panicle and the total grain numbere1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“on Rice Yield and Yield Components”
e1“The reduction in grains per panicle and the total grain number was the main reason for yield reduction under DFAA stress”
Claim · model-written summary
The damage in total grain number was 18.84% in 2016.
- Taxon
- RiceOryza sativat0
- Outcome
- damage in terms of the total grain numbere1
- Value
- 18.84e1
- Setting
- in 2016e1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“on Rice Yield and Yield Components”
e1“The damage in terms of the total grain number amounted to 18.84 and 17.82% in 2016 and 2017, respectively”
Claim · model-written summary
The damage in total grain number was 17.82% in 2017.
- Taxon
- RiceOryza sativat0
- Outcome
- damage in terms of the total grain numbere1
- Value
- 17.82%e1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“on Rice Yield and Yield Components”
e1“The damage in terms of the total grain number amounted to 18.84 and 17.82% in 2016 and 2017, respectively”
Claim · model-written summary
Interannual differences in thousand-seed mass and seed setting rate increased in 2016 and decreased in 2017.
- Taxon
- RiceOryza sativat0
- Outcome
- interannual differencese1
- Qualifier
- increased in 2016 and decreased in 2017e1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“on Rice Yield and Yield Components”
e1“The interannual differences in the thousand‐seed mass and seed setting rate increased in 2016 and decreased in 2017”
Claim · model-written summary
Under drought conditions, flood stress of the DFAA groups reduced rice yield compared with the drought and flood groups.
- Taxon
- RiceOryza sativat0
- Treatment
- flood stress of the DFAA groupse1
- Outcome
- yielde1
- Direction
- reducede1
- Comparator
- drought groups and the flood groupse1
- Setting
- under drought conditionse1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“on Rice Yield and Yield Components”
e1“Compared with the drought groups and the flood groups, the flood stress of the DFAA groups reduced the yield under drought conditions”
Claim · model-written summary
Under flood conditions, drought stress of the DFAA groups compensated rice yield, mainly through higher total grain number and seed setting rate in the drought period.
- Taxon
- RiceOryza sativat0
- Treatment
- drought stress of the DFAA groupse1
- Outcome
- yielde1
- Direction
- compensatede1
- Qualifier
- mainly because the total grain number and seed setting rate increased during the drought periode1
- Setting
- under flood conditionse1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“on Rice Yield and Yield Components”
e1“The drought stress of the DFAA groups compensated the yield under flood conditions, mainly because the total grain number and seed setting rate increased during the drought period”
Claim · model-written summary
Under long-term light drought, panicles per barrel, grains per panicle and total grain number increased.
- Taxon
- RiceOryza sativat0
- Treatment
- light droughte1
- Outcome
- panicles per barrel, grains per panicle, total grain numbere1
- Direction
- increasede1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“on Rice Yield and Yield Components”
e1“Under long‐term light drought conditions, the panicles per barrel, grains per panicle, total grain number, thousand‐seed mass, and seed setting rate increased”
Claim · model-written summary
Under long-term light drought, thousand-seed mass and seed setting rate increased.
- Taxon
- RiceOryza sativat0
- Treatment
- light droughte1
- Outcome
- thousand‐seed mass, and seed setting ratee1
- Direction
- increasede1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“on Rice Yield and Yield Components”
e1“Under long‐term light drought conditions, the panicles per barrel, grains per panicle, total grain number, thousand‐seed mass, and seed setting rate increased”
Claim · model-written summary
Under long-term heavy drought, panicles per barrel mainly increased.
- Taxon
- RiceOryza sativat0
- Treatment
- heavy droughte1
- Outcome
- panicles per barrele1
- Direction
- mainly increasede1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“on Rice Yield and Yield Components”
e1“Under long‐term heavy drought conditions, the panicles per barrel mainly increased”
The same questions in other papers
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See all 325 papers →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.