Abstract
In order to develop the suitable technology for seedling nursery and increase the yield of mechanical transplanting middleseason indica hybrid rice,the experiment of two factors of uniconazole and sowing density was conducted in plastic tray seedling nursery using the variety‘Huiliangyou 6',and then the effects of uniconazole and sowing density on seedling quality,transplant quality and yield of rice were researched.The results showed that the seedling quality decreased rapidly with the increasing of sowing density in the same chemical regulation treatment.There existed a decreasing trend in the number of roots,dry weight per 100 plants,basal stem width and root vigor.Meanwhile,the MDA content of seedling leaf was significantly increased.There was no significant difference in seed setting rate and 1 000-grain weight among the different sowing density treatments.The number of effective panicles showed an increasing trend within the sowing density range from 8 000 to 18 000 grains·m-2,but decreasing from18 000 to 30 000 grains·m-2.Finally,the yield of rice displayed the same trend as the number of effective panicles.The yield of 18 000 grains·m-2treatment was significantly higher than that of other treatments.There existed significant effects of uniconazole on seedling quality and yield of different sowing density.The method of soaking seeds with 100 mg·L-1uniconazole and spraying seedling leaf with 150 mg·L-1uniconazole in 2.5 leaf age was better than the other chemical regulation method and control.It not only significantly increased the seedling quality and transplant quality,but also promoted seedling turn green and increased the number of effective panicles,grains per pancile and seed setting rate significantly,so that the yield was significantly increased.Accroding to the characters of mechanical transplanting middleseason indica hybrid rice,soaking seeds with 100 mg·L-1uniconazole and spraying seedling leaf with 150 mg·L-1uniconazole in 2.5leaf age combined the sowing density of 18 000 grains·m-2was the better seedling nursery method.It can help to keep great seedling quality,transplant quality,and stabliz 1 000-grain weight and increase the number of effective panicles,grains per pancile and seed setting rate.The sink and its effective filling rate were significantly enhanced.Finally,the yield was significantly increased.
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Claims 15
Claim · model-written summary
Seedling quality declined as sowing density increased.
- Taxon
- rice
Oryza sativat0 - Treatment
- sowing densitye0
- Outcome
- seedling qualitye0
- Direction
- decreasede0
- Qualifier
- same chemical regulation treatmente0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the seedling quality decreased rapidly with the increasing of sowing density in the same chemical regulation treatment.”
t0“rice”
Claim · model-written summary
Root number, dry weight per 100 plants, basal stem width and root vigor declined with density.
- Taxon
- riceOryza sativat0
- Treatment
- sowing densitye1
- Outcome
- number of roots,dry weight per 100 plants,basal stem width and root vigore0
- Direction
- decreasinge0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“There existed a decreasing trend in the number of roots,dry weight per 100 plants,basal stem width and root vigor.”
e1“the increasing of sowing density”
t0“rice”
Claim · model-written summary
Seedling leaf MDA content increased significantly with density.
- Taxon
- riceOryza sativat0
- Treatment
- sowing densitye1
- Outcome
- MDA content of seedling leafe0
- Direction
- increasede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Meanwhile,the MDA content of seedling leaf was significantly increased.”
e1“the increasing of sowing density”
t0“rice”
Claim · model-written summary
Seed setting rate and 1 000-grain weight did not differ significantly among densities.
- Taxon
- riceOryza sativat0
- Treatment
- different sowing density treatmentse0
- Outcome
- seed setting rate and 1 000-grain weighte0
- Direction
- no significant differencee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“There was no significant difference in seed setting rate and 1 000-grain weight among the different sowing density treatments.”
t0“rice”
Claim · model-written summary
Effective panicles increased from 8,000 to 18,000 grains per square metre.
- Taxon
- riceOryza sativat0
- Treatment
- sowing density range from 8 000 to 18 000 grains·m-2e0
- Outcome
- number of effective paniclese0
- Direction
- increasinge0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The number of effective panicles showed an increasing trend within the sowing density range from 8 000 to 18 000 grains·m-2”
t0“rice”
Claim · model-written summary
Effective panicles decreased from 18,000 to 30,000 grains per square metre.
- Taxon
- riceOryza sativat0
- Treatment
- 18 000 to 30 000 grains·m-2e0
- Outcome
- number of effective paniclese1
- Direction
- decreasinge0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“but decreasing from18 000 to 30 000 grains·m-2.”
e1“The number of effective panicles showed an increasing trend”
t0“rice”
Claim · model-written summary
Rice yield followed the same pattern as effective panicles.
- Taxon
- riceOryza sativae0
- Organ / stage
- effective paniclese0
- Outcome
- yield of ricee0
Not reportedTreatmentDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Finally,the yield of rice displayed the same trend as the number of effective panicles.”
Claim · model-written summary
Yield at 18,000 grains per square metre exceeded other treatments significantly.
- Taxon
- riceOryza sativat0
- Treatment
- 18 000 grains·m-2treatmente0
- Outcome
- yielde0
- Direction
- highere0
- Comparator
- other treatmentse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The yield of 18 000 grains·m-2treatment was significantly higher than that of other treatments.”
t0“rice”
Claim · model-written summary
Uniconazole significantly affected seedling quality and yield across densities.
- Taxon
- riceOryza sativat0
- Treatment
- uniconazolee0
- Outcome
- seedling quality and yielde0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“There existed significant effects of uniconazole on seedling quality and yield of different sowing density.”
t0“rice”
Claim · model-written summary
Seed soaking and leaf spraying with uniconazole improved seedling and transplant quality.
- Taxon
- riceOryza sativat0
- Treatment
- soaking seeds with 100 mg·L-1uniconazole and spraying seedling leaf with 150 mg·L-1uniconazole in 2.5 leaf agee0
- Outcome
- seedling quality and transplant qualitye0
- Direction
- increasede0
- Comparator
- other chemical regulation method and controle0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The method of soaking seeds with 100 mg·L-1uniconazole and spraying seedling leaf with 150 mg·L-1uniconazole in 2.5 leaf age was better than the other chemical regulation method and control.It not only significantly increased the seedling quality and transplant quality”
t0“rice”
Claim · model-written summary
Uniconazole treatment promoted seedling greening.
- Taxon
- riceOryza sativat0
- Treatment
- soaking seeds with 100 mg·L-1uniconazole and spraying seedling leaf with 150 mg·L-1uniconazole in 2.5 leaf agee1
- Outcome
- seedling turn greene0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“but also promoted seedling turn green”
e1“soaking seeds with 100 mg·L-1uniconazole and spraying seedling leaf with 150 mg·L-1uniconazole in 2.5 leaf age”
t0“rice”
Claim · model-written summary
Uniconazole treatment significantly increased effective panicles, grains per panicle and seed setting rate.
- Taxon
- riceOryza sativat0
- Treatment
- soaking seeds with 100 mg·L-1uniconazole and spraying seedling leaf with 150 mg·L-1uniconazole in 2.5 leaf agee1
- Outcome
- number of effective panicles,grains per pancile and seed setting ratee0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“increased the number of effective panicles,grains per pancile and seed setting rate significantly”
e1“soaking seeds with 100 mg·L-1uniconazole and spraying seedling leaf with 150 mg·L-1uniconazole in 2.5 leaf age”
t0“rice”
Claim · model-written summary
Uniconazole treatment significantly increased yield.
- Taxon
- riceOryza sativat0
- Treatment
- soaking seeds with 100 mg·L-1uniconazole and spraying seedling leaf with 150 mg·L-1uniconazole in 2.5 leaf agee1
- Outcome
- yielde0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“so that the yield was significantly increased.”
e1“soaking seeds with 100 mg·L-1uniconazole and spraying seedling leaf with 150 mg·L-1uniconazole in 2.5 leaf age”
t0“rice”
Claim · model-written summary
Combined uniconazole and 18,000 grains per square metre was recommended as the better nursery method.
- Taxon
- riceOryza sativat0
- Treatment
- soaking seeds with 100 mg·L-1uniconazole and spraying seedling leaf with 150 mg·L-1uniconazole in 2.5leaf age combined the sowing density of 18 000 grains·m-2e0
- Outcome
- better seedling nursery methode0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“soaking seeds with 100 mg·L-1uniconazole and spraying seedling leaf with 150 mg·L-1uniconazole in 2.5leaf age combined the sowing density of 18 000 grains·m-2was the better seedling nursery method.”
t0“rice”
Claim · model-written summary
The combined nursery method enhanced sink and its filling rate significantly.
- Taxon
- riceOryza sativat0
- Treatment
- soaking seeds with 100 mg·L-1uniconazole and spraying seedling leaf with 150 mg·L-1uniconazole in 2.5leaf age combined the sowing density of 18 000 grains·m-2e1
- Outcome
- sink and its effective filling ratee0
- Direction
- enhancede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The sink and its effective filling rate were significantly enhanced.”
e1“soaking seeds with 100 mg·L-1uniconazole and spraying seedling leaf with 150 mg·L-1uniconazole in 2.5leaf age combined the sowing density of 18 000 grains·m-2”
t0“rice”
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