Abstract
The effects of nitrogen-free basal dressing (BNo) and top-dressing on the growth and yield of two rice varieties, Akitakomachi and Hitomebore, planted at a standard density (22.2 hills m−2) and sparse density (16.7 hills m−2) were examined. The maximum number of stems and the number of panicles per unit area were lower in both BNo plots with a standard planting density (BNo22) and sparse planting density (BNol7) than in the control plot with standard nitrogen dressing and standard planting density (CONT) in both varieties. The number of panicles and spikelets per unit area was lower in both BNo22 and BNo 17 than in CONT, but the number of spikelets per panicle in BNo 17 was significantly higher than that in CONT, although that in BNo22 was not. In BNo22, the percentage of ripened grains and 1,000 grain weight were significantly higher than those in CONT, but in BNo 17, 1,000 grain weight was similar to that in CONT, although the percentage of ripened grains was higher than that in CONT. Grain yield in both BNo22 and BNo 17 was not significantly different from that in CONT, and that in BNo 17 was 660 and 710 g m−2 in Akitakomachi and Hitomebore, respectively. The leaf area index was lower and crop growth rate was higher in both BNo22 and BNol7 than in CONT at the grain-filling stage. The net assimilation rate and specific leaf weight were significantly higher in BNo22 and BNo 17 than in CONT at the panicle formation and grain-filling stages, respectively. Nitrogen top-dressing at the neck node differentiation stage was found to be very useful for the cultivation of these rice varieties under BNo with sparse planting density in the Tohoku district.
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Claims 10
Claim · model-written summary
Maximum stem number and panicle number per unit area were lower under nitrogen-free basal dressing than under the control.
- Taxon
- rice
Oryza sativae0 - Material
- Akitakomachi and Hitomeboree0
- Treatment
- nitrogen-free basal dressing (BNo)e1
- Outcome
- maximum number of stems and the number of panicles per unit areae2
- Direction
- lowere2
- Comparator
- control plot with standard nitrogen dressing and standard planting density (CONT)e3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“growth and yield of two rice varieties, Akitakomachi and Hitomebore”
e1“nitrogen-free basal dressing (BNo)”
e2“The maximum number of stems and the number of panicles per unit area were lower in both BNo plots”
e3“than in the control plot with standard nitrogen dressing and standard planting density (CONT)”
Claim · model-written summary
Under BNo at sparse density, spikelets per panicle were significantly higher than under the control.
- Taxon
- riceOryza sativae0
- Treatment
- BNo 17e4
- Outcome
- number of spikelets per paniclee4
- Direction
- highere4
- Comparator
- CONTe4
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“growth and yield of two rice varieties, Akitakomachi and Hitomebore”
e4“the number of spikelets per panicle in BNo 17 was significantly higher than that in CONT”
Claim · model-written summary
Spikelets per panicle under BNo at standard density were not higher than under the control.
- Taxon
- riceOryza sativae0
- Treatment
- BNo22e5
- Outcome
- spikelets per paniclee4
- Direction
- was note5
- Comparator
- CONTe4
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“growth and yield of two rice varieties, Akitakomachi and Hitomebore”
e4“the number of spikelets per panicle in BNo 17 was significantly higher than that in CONT”
e5“although that in BNo22 was not”
Claim · model-written summary
Under BNo at standard density, ripened grain percentage and 1,000-grain weight were significantly higher than under the control.
- Taxon
- riceOryza sativae0
- Treatment
- BNo22e6
- Outcome
- the percentage of ripened grains and 1,000 grain weighte6
- Direction
- highere6
- Comparator
- CONTe6
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“growth and yield of two rice varieties, Akitakomachi and Hitomebore”
e6“In BNo22, the percentage of ripened grains and 1,000 grain weight were significantly higher than those in CONT”
Claim · model-written summary
Under BNo at sparse density, 1,000-grain weight was similar to the control.
- Taxon
- riceOryza sativae0
- Treatment
- BNo 17e7
- Outcome
- 1,000 grain weighte7
- Direction
- no_changeinferrede7
- Comparator
- CONTe7
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“growth and yield of two rice varieties, Akitakomachi and Hitomebore”
e7“in BNo 17, 1,000 grain weight was similar to that in CONT”
Claim · model-written summary
Under BNo at sparse density, the ripened grain percentage was higher than the control.
- Taxon
- riceOryza sativae0
- Treatment
- BNo 17e7
- Outcome
- the percentage of ripened grainse2
- Direction
- highere2
- Comparator
- CONTe2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“growth and yield of two rice varieties, Akitakomachi and Hitomebore”
e7“in BNo 17, 1,000 grain weight was similar to that in CONT”
e2“the percentage of ripened grains was higher than that in CONT”
Claim · model-written summary
Grain yield under BNo at both densities was not significantly different from the control.
- Taxon
- riceOryza sativae0
- Treatment
- BNo22 and BNo 17e1
- Outcome
- Grain yielde1
- Direction
- not significantly differente1
- Comparator
- CONTe1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“growth and yield of two rice varieties, Akitakomachi and Hitomebore”
e1“Grain yield in both BNo22 and BNo 17 was not significantly different from that in CONT”
Claim · model-written summary
Under BNo at sparse density, grain yield was 660 and 710 g m-2 for Akitakomachi and Hitomebore.
- Taxon
- riceOryza sativae0
- Material
- Akitakomachi and Hitomeboree2
- Treatment
- BNo 17e2
- Outcome
- Grain yielde1
- Value
- 660 and 710 g m−2e2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“growth and yield of two rice varieties, Akitakomachi and Hitomebore”
e1“Grain yield in both BNo22 and BNo 17 was not significantly different from that in CONT”
e2“that in BNo 17 was 660 and 710 g m−2 in Akitakomachi and Hitomebore”
Claim · model-written summary
Net assimilation rate and specific leaf weight were significantly higher under BNo than under the control at panicle formation and grain filling.
- Taxon
- riceOryza sativae0
- Organ / stage
- panicle formation and grain-filling stagese1
- Treatment
- BNo22 and BNo 17e1
- Outcome
- net assimilation rate and specific leaf weighte1
- Direction
- highere1
- Comparator
- CONTe1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“growth and yield of two rice varieties, Akitakomachi and Hitomebore”
e1“The net assimilation rate and specific leaf weight were significantly higher in BNo22 and BNo 17 than in CONT at the panicle formation and grain-filling stages”
Claim · model-written summary
Nitrogen top-dressing at the neck node differentiation stage is very useful for cultivating these rice varieties under BNo with sparse density in the Tohoku district.
- Taxon
- riceOryza sativae0
- Treatment
- Nitrogen top-dressing at the neck node differentiation stagee1
- Outcome
- cultivation of these rice varietiese1
- Setting
- Tohoku districte1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“growth and yield of two rice varieties, Akitakomachi and Hitomebore”
e1“Nitrogen top-dressing at the neck node differentiation stage was found to be very useful for the cultivation of these rice varieties under BNo with sparse planting density in the Tohoku district”
The same questions in other papers
nitrogen · yield · Oryza sativa (rice)Positive and negative results
1,802 papers in the same direction as this paper · 193 in the opposite direction · 49 reporting no difference from an alternative
This paper is about lacking the nutrient, so it counts the other way round here.
- no effect
- negative
- negative
2,041 papers more in this group
See all 2,045 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.