Abstract
Pot experiment was conducted to investigate the differences in response of main root traits at heading stage and grain yield of four rice varieties, Ribenqing, Wuyunjing 8, Yangdao 6 and Shanyou 63, to nitrogen application time. Nitrogen fertilizer was applied as basal and as top-dressing for tillering, spikelet-promoting and spikelet-sustaining, with no nitrogen application as control. The results showed that: (1) There were significant varietal differences of root traits among different ear-type of varieties. Small-ear type variety presented superiority in number of adventitious roots and total length of the roots per plant, while large-ear type variety had superiority in dry weight of roots per plant and diameter of per adventitious root; (2) Response of number of adventitious roots per plant to nitrogen application time was similar in four varieties,i.e. earlier application was more effective. Basal N and top-dressing significantly increased dry weight and total length of adventitious roots per plant, all varieties involved in this study showed the same tendency, while significant differences in response of that to ear fertilizer were observed among the varieties. There was no significant effect of N application time on diameter of per adventitious; (3) The positive effect of N applied during ear development on dry weight of roots total length of the roots per plant in large-ear type variety at heading stage was greater than that in small-ear type variety, and spikelet promoting was more effective; (4) As ear-type enlarged and grain yield increased, the number of root traits affecting grain yield increased gradually; (5) Results obtained indicated that improving the development of adventitious roots per plant was important to increase root accumulation at heading stage and grain yield, and all varieties involved in this study showed the same tendency.
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Claims 11
Claim · model-written summary
Root traits differed significantly among rice ear types.
- Taxon
- Rice (Oryza sativa L.)
Oryza sativat0 - Material
- different ear-type of varietiese0
- Outcome
- root traitse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“There were significant varietal differences of root traits among different ear-type of varieties”
t0“Rice (Oryza sativa L.)”
Claim · model-written summary
Small-ear varieties had superior adventitious root number and total root length.
- Taxon
- Rice (Oryza sativa L.)Oryza sativat0
- Material
- Small-ear type varietye0
- Outcome
- number of adventitious roots and total length of the roots per plante0
- Direction
- superioritye0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Small-ear type variety presented superiority in number of adventitious roots and total length of the roots per plant”
t0“Rice (Oryza sativa L.)”
Claim · model-written summary
Large-ear varieties had superior root dry weight and adventitious root diameter.
- Taxon
- Rice (Oryza sativa L.)Oryza sativat0
- Material
- large-ear type varietye0
- Outcome
- dry weight of roots per plant and diameter of per adventitious roote0
- Direction
- superioritye0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“large-ear type variety had superiority in dry weight of roots per plant and diameter of per adventitious root”
t0“Rice (Oryza sativa L.)”
Claim · model-written summary
Earlier nitrogen application was more effective for adventitious root number in all four varieties.
- Taxon
- Rice (Oryza sativa L.)Oryza sativat0
- Treatment
- earlier applicatione0
- Outcome
- number of adventitious roots per plante0
- Direction
- more effectivee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Response of number of adventitious roots per plant to nitrogen application time was similar in four varieties,i.e. earlier application was more effective”
t0“Rice (Oryza sativa L.)”
Claim · model-written summary
Basal nitrogen and top-dressing significantly increased adventitious root dry weight and total length in all varieties.
- Taxon
- Rice (Oryza sativa L.)Oryza sativat0
- Treatment
- Basal N and top-dressinge0
- Outcome
- dry weight and total length of adventitious roots per plante0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Basal N and top-dressing significantly increased dry weight and total length of adventitious roots per plant, all varieties involved in this study showed the same tendency”
t0“Rice (Oryza sativa L.)”
Claim · model-written summary
Varieties differed significantly in their root response to ear fertilizer.
- Taxon
- Rice (Oryza sativa L.)Oryza sativat0
- Treatment
- ear fertilizere0
- Outcome
- response of that to ear fertilizere0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“significant differences in response of that to ear fertilizer were observed among the varieties”
t0“Rice (Oryza sativa L.)”
Claim · model-written summary
Nitrogen application time had no significant effect on adventitious root diameter.
- Taxon
- Rice (Oryza sativa L.)Oryza sativat0
- Treatment
- N application timee0
- Outcome
- diameter of per adventitiouse0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“There was no significant effect of N application time on diameter of per adventitious”
t0“Rice (Oryza sativa L.)”
Claim · model-written summary
Ear-stage nitrogen had a greater positive effect on root dry weight and length in large-ear than small-ear varieties.
- Taxon
- Rice (Oryza sativa L.)Oryza sativat0
- Material
- large-ear type varietye0
- Treatment
- N applied during ear developmente0
- Outcome
- dry weight of roots total length of the roots per plante0
- Direction
- greatere0
- Comparator
- small-ear type varietye0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The positive effect of N applied during ear development on dry weight of roots total length of the roots per plant in large-ear type variety at heading stage was greater than that in small-ear type variety”
t0“Rice (Oryza sativa L.)”
Claim · model-written summary
Spikelet-promoting nitrogen was more effective for the root response.
- Taxon
- Rice (Oryza sativa L.)Oryza sativat0
- Treatment
- spikelet promotinge0
- Outcome
- more effectivee0
- Direction
- more effectivee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“spikelet promoting was more effective”
t0“Rice (Oryza sativa L.)”
Claim · model-written summary
The number of root traits affecting yield grew as ear type and grain yield increased.
- Taxon
- Rice (Oryza sativa L.)Oryza sativat0
- Material
- ear-typee0
- Outcome
- number of root traits affecting grain yielde0
- Direction
- increased graduallye0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“As ear-type enlarged and grain yield increased, the number of root traits affecting grain yield increased gradually”
t0“Rice (Oryza sativa L.)”
Claim · model-written summary
The authors concluded that improving adventitious roots is important for root accumulation and grain yield.
- Taxon
- Rice (Oryza sativa L.)Oryza sativat0
- Outcome
- improving the development of adventitious roots per plante0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“improving the development of adventitious roots per plant was important to increase root accumulation at heading stage and grain yield”
t0“Rice (Oryza sativa L.)”
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See all 759 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.