Abstract
Pot experiment with 7 treatments was conducted during 1997~1998 to investigate effects of nitrogen fertilizer applied at different growth stages on root growth and grain yield of Yangdao 6 ( Oryza sativa L.). Nitrogen was applied as basal or as top dressing for tillering, spikelet promoting and spikelet sustaining. Results were as follows: ① Basal nitrogen and top dressing at tillering stage significantly increased the number of adventitious roots, the total length of the roots and root dry weight per plant in internode elongation stage and in leaf age remainde. ② Low rate of N application could significantly increase the number of adventitious roots, the total length of the roots and root dry weight per plant, regardless of applying as basal, tillering or spikelet promoting fertilizer. Earlier application was more effective. ③ Combination of top dressing N as tillering and spikelet promoting N significantly increased root dry weight. Combination of top dressing N as tillering and spikelet sustaining N stimulated the elongation of adventitious roots, and increased the total length of roots per plant. ④ Grain yield per plant had close correlation with root dry weight per plant, the number of adventitious roots per plant and dry weight per unit length of root, i.e., correlation coefficients ( r , df=12) were 0.838 6 ** , 0.715 9 ** and 0 554 7 *, respectively.
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Claims 9
Claim · model-written summary
Basal nitrogen and top dressing at tillering stage increased adventitious root number, total root length and root dry weight per plant of Yangdao 6.
- Taxon
- Oryza sativa L.
Oryza sativae0 - Material
- Yangdao 6e0
- Organ / stage
- internode elongation stagee1
- Treatment
- Basal nitrogen and top dressing at tillering stagee1
- Outcome
- the number of adventitious roots, the total length of the roots and root dry weight per plante1
- Direction
- increasede1
- Setting
- Pot experimente0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Pot experiment with 7 treatments was conducted during 1997~1998 to investigate effects of nitrogen fertilizer applied at different growth stages on root growth and grain yield of Yangdao 6 ( Oryza sativa L.)”
e1“Basal nitrogen and top dressing at tillering stage significantly increased the number of adventitious roots, the total length of the roots and root dry weight per plant in internode elongation stage and in leaf age remainde”
Claim · model-written summary
A low rate of N application increased adventitious root number, total root length and root dry weight per plant, regardless of application timing.
- Taxon
- Oryza sativa L.Oryza sativae0
- Material
- Yangdao 6e0
- Treatment
- Low rate of N applicatione2
- Outcome
- the number of adventitious roots, the total length of the roots and root dry weight per plante2
- Direction
- increasee2
- Qualifier
- regardless of applying as basal, tillering or spikelet promoting fertilizere2
- Setting
- Pot experimente0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Pot experiment with 7 treatments was conducted during 1997~1998 to investigate effects of nitrogen fertilizer applied at different growth stages on root growth and grain yield of Yangdao 6 ( Oryza sativa L.)”
e2“Low rate of N application could significantly increase the number of adventitious roots, the total length of the roots and root dry weight per plant, regardless of applying as basal, tillering or spikelet promoting fertilizer”
Claim · model-written summary
Earlier application of nitrogen was more effective than later application.
- Taxon
- Oryza sativa L.Oryza sativae0
- Treatment
- Earlier applicatione3
- Outcome
- Earlier application was more effectivee3
- Direction
- more effectivee3
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Pot experiment with 7 treatments was conducted during 1997~1998 to investigate effects of nitrogen fertilizer applied at different growth stages on root growth and grain yield of Yangdao 6 ( Oryza sativa L.)”
e3“Earlier application was more effective”
Claim · model-written summary
Combined top dressing at tillering and spikelet promoting stages significantly increased root dry weight of Yangdao 6.
- Taxon
- Oryza sativa L.Oryza sativae0
- Treatment
- Combination of top dressing N as tillering and spikelet promoting Ne4
- Outcome
- root dry weighte4
- Direction
- increasede4
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Pot experiment with 7 treatments was conducted during 1997~1998 to investigate effects of nitrogen fertilizer applied at different growth stages on root growth and grain yield of Yangdao 6 ( Oryza sativa L.)”
e4“Combination of top dressing N as tillering and spikelet promoting N significantly increased root dry weight”
Claim · model-written summary
Combined top dressing at tillering and spikelet sustaining stages stimulated elongation of adventitious roots.
- Taxon
- Oryza sativa L.Oryza sativae0
- Treatment
- Combination of top dressing N as tillering and spikelet sustaining Ne5
- Outcome
- elongation of adventitious rootse5
- Direction
- stimulatede5
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Pot experiment with 7 treatments was conducted during 1997~1998 to investigate effects of nitrogen fertilizer applied at different growth stages on root growth and grain yield of Yangdao 6 ( Oryza sativa L.)”
e5“Combination of top dressing N as tillering and spikelet sustaining N stimulated the elongation of adventitious roots, and increased the total length of roots per plant”
Claim · model-written summary
Combined top dressing at tillering and spikelet sustaining stages increased total length of roots per plant.
- Taxon
- Oryza sativa L.Oryza sativae0
- Treatment
- Combination of top dressing N as tillering and spikelet sustaining Ne5
- Outcome
- total length of roots per plante5
- Direction
- increasede5
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Pot experiment with 7 treatments was conducted during 1997~1998 to investigate effects of nitrogen fertilizer applied at different growth stages on root growth and grain yield of Yangdao 6 ( Oryza sativa L.)”
e5“Combination of top dressing N as tillering and spikelet sustaining N stimulated the elongation of adventitious roots, and increased the total length of roots per plant”
Claim · model-written summary
Grain yield per plant showed a close correlation with root dry weight per plant (r = 0.838 6).
- Taxon
- Oryza sativa L.Oryza sativae0
- Organ / stage
- roote6
- Outcome
- Grain yield per plante6
- Value
- 0.838 6e6
- Qualifier
- df=12e6
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Pot experiment with 7 treatments was conducted during 1997~1998 to investigate effects of nitrogen fertilizer applied at different growth stages on root growth and grain yield of Yangdao 6 ( Oryza sativa L.)”
e6“Grain yield per plant had close correlation with root dry weight per plant, the number of adventitious roots per plant and dry weight per unit length of root, i.e., correlation coefficients ( r , df=12) were 0.838 6 ** , 0.715 9 ** and 0 554 7 *, respectively”
Claim · model-written summary
Grain yield per plant showed a close correlation with the number of adventitious roots per plant (r = 0.715 9).
- Taxon
- Oryza sativa L.Oryza sativae0
- Organ / stage
- adventitious rootse6
- Outcome
- Grain yield per plante6
- Value
- 0.715 9e6
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Pot experiment with 7 treatments was conducted during 1997~1998 to investigate effects of nitrogen fertilizer applied at different growth stages on root growth and grain yield of Yangdao 6 ( Oryza sativa L.)”
e6“Grain yield per plant had close correlation with root dry weight per plant, the number of adventitious roots per plant and dry weight per unit length of root, i.e., correlation coefficients ( r , df=12) were 0.838 6 ** , 0.715 9 ** and 0 554 7 *, respectively”
Claim · model-written summary
Grain yield per plant showed a correlation with dry weight per unit length of root (r = 0 554 7).
- Taxon
- Oryza sativa L.Oryza sativae0
- Organ / stage
- roote6
- Outcome
- Grain yield per plante6
- Value
- 0 554 7e6
- Qualifier
- dry weight per unit length of roote6
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Pot experiment with 7 treatments was conducted during 1997~1998 to investigate effects of nitrogen fertilizer applied at different growth stages on root growth and grain yield of Yangdao 6 ( Oryza sativa L.)”
e6“Grain yield per plant had close correlation with root dry weight per plant, the number of adventitious roots per plant and dry weight per unit length of root, i.e., correlation coefficients ( r , df=12) were 0.838 6 ** , 0.715 9 ** and 0 554 7 *, respectively”
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