Abstract
AKURATANIassociated with N nutrition of the crop .W ( ) per unit area is closely related to grain yield in rice .: The objective of this study is to clarify regional optimum spikelet number for maximum grain yield for each cultivar, and plant N for spikelet number to obtain stable yield in rice.We conducted field experiments in a paddy field at Tanazawa District as city agriculture in order to establish highly e ective N application management regionally.We analyzed sets of experimental data on yield and its component, and plant N at the late spikelet di erentiation and heading stage, using three low land cultivars, Nipponbare, Koshihikari and Takanari, grown under di erent methods and levels of N application over seasons from to .We made use of variously di erent split application of N, including basal application only (B), light basal and heavy top-dressings from the panicle initiation stage onward (L), heavy basal and heavy top-dressings from the spikelet formation stage onward (V), and no applications ( ) in .In , and we set up experimental plots of the timing of a N top-dressing both with and without basal application of N. We investigated yield and its components and plant N at the late spikelet di erentiation stage and heading.Takanari tended to have the largest spikelet number and grain yield averaged over all plots.Optimum spikelet number for maximum grain yield was about m in Nipponbare and Koshihikari, and about m in Takanari, respectively.The relationship between spikelet number per unit area and plant N at the late spikelet di erentiation stage or heading stage was close.Plant N for optimum spikelet number determined by those relationships was ., .and .g m at the late di erentiation stage, and ., .and .
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Claims 4
Claim · model-written summary
Takanari tended to have the largest spikelet number and grain yield across plots.
- Taxon
- Rice
Oryza sativae1 - Material
- Takanarie0
- Outcome
- largest spikelet number and grain yielde0
- Direction
- largeste0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Takanari tended to have the largest spikelet number and grain yield averaged over all plots.”
e1“Rice at Tanazawa Paddy Field”
Claim · model-written summary
The study identified an optimum spikelet number for Nipponbare and Koshihikari, although its value is corrupted.
- Taxon
- RiceOryza sativae1
- Material
- Nipponbare and Koshihikarie0
- Outcome
- Optimum spikelet number for maximum grain yielde0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Optimum spikelet number for maximum grain yield was about m in Nipponbare and Koshihikari”
e1“Rice at Tanazawa Paddy Field”
Claim · model-written summary
The study identified an optimum spikelet number for Takanari, although its value is corrupted.
- Taxon
- RiceOryza sativae1
- Material
- Takanarie0
- Outcome
- about me0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“about m in Takanari”
e1“Rice at Tanazawa Paddy Field”
Claim · model-written summary
Spikelet number was closely related to plant N at late differentiation or heading.
- Taxon
- RiceOryza sativae1
- Organ / stage
- late spikelet di erentiation stage or heading stagee0
- Outcome
- spikelet number per unit areae0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The relationship between spikelet number per unit area and plant N at the late spikelet di erentiation stage or heading stage was close.”
e1“Rice at Tanazawa Paddy Field”