Abstract
The paddy rice variety used was Norin-8, which was grown in the paddy field under different levels of nitrogen supply and different density, changing the spacing at the begining of heading. The increased amount of dry matter production was measured by using growth-analysis during ripening period. Results obtained from this investigation briefly summerized as follows: 1) Relative growth rate (RGR) was completely controlled by the net assimilation rate (NAR) per unit leaf area, so far as the increment of top-dry-weight was expressed by RGR throughout ripening period. 2) The size of leaf area for maximum production of dry matter per unit field area (optimum L) was estimated nearly 2.3 m2/m2 field throughout ripening period. 3) The growth rate (G=dw/dt) during ripening period was controlled by leaf area per unit field area (L) in case the leaf area was restricted below the optimum L. 4) NAR in ripening period was closely related to both the nitrogen percentage and the chlorophyll percentage in leaf-blades. The relation was shown as a curve, usually showing the maximum value of NAR at 2.3% of total nitrogen content and 1.4% of chlorophyll content as fresh matter weight in leaf-blades, and rather decling NAR values at the higher percentages. 5) Forecasting of dry matter production in ripening period seems to be possible by determining the total nitrogen content in total leaf-blades per unit field area at the begining of ripening stage
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Claims 9
Claim · model-written summary
Relative growth rate was controlled by net assimilation rate per leaf area.
- Taxon
- Rice Plant
Oryza sativat0 - Organ / stage
- leaf areae0
- Outcome
- Relative growth rate (RGR)e0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Relative growth rate (RGR) was completely controlled by the net assimilation rate (NAR) per unit leaf area”
t0“Rice Plant”
Claim · model-written summary
The estimated optimum leaf area for dry-matter production was nearly 2.3 m2/m2 field.
- Taxon
- Rice PlantOryza sativat0
- Organ / stage
- ripening periode0
- Outcome
- maximum production of dry matter per unit field areae0
- Direction
- maximume0
- Value
- 2.3 m2/m2 fielde0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The size of leaf area for maximum production of dry matter per unit field area (optimum L) was estimated nearly 2.3 m2/m2 field throughout ripening period.”
t0“Rice Plant”
Claim · model-written summary
Below optimum leaf area, leaf area controlled growth rate during ripening.
- Taxon
- Rice PlantOryza sativat0
- Organ / stage
- leaf area per unit field area (L)e0
- Outcome
- growth rate (G=dw/dt)e0
- Qualifier
- below the optimum Le0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The growth rate (G=dw/dt) during ripening period was controlled by leaf area per unit field area (L) in case the leaf area was restricted below the optimum L.”
t0“Rice Plant”
Claim · model-written summary
Net assimilation rate was related to leaf-blade nitrogen percentage.
- Taxon
- Rice PlantOryza sativat0
- Organ / stage
- leaf-bladese0
- Compound
- nitrogene0
- Outcome
- NARe0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“NAR in ripening period was closely related to both the nitrogen percentage and the chlorophyll percentage in leaf-blades.”
t0“Rice Plant”
Claim · model-written summary
Net assimilation rate was related to leaf-blade chlorophyll percentage.
- Taxon
- Rice PlantOryza sativat0
- Organ / stage
- leaf-bladese0
- Compound
- chlorophylle0
- Outcome
- NARe0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“NAR in ripening period was closely related to both the nitrogen percentage and the chlorophyll percentage in leaf-blades.”
t0“Rice Plant”
Claim · model-written summary
Net assimilation rate peaked at 2.3% total nitrogen content.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“maximum value of NAR at 2.3% of total nitrogen content”
t0“Rice Plant”
Claim · model-written summary
Net assimilation rate peaked at 1.4% chlorophyll content.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“maximum value of NAR at 2.3% of total nitrogen content and 1.4% of chlorophyll content”
t0“Rice Plant”
Claim · model-written summary
Net assimilation rate declined at higher nitrogen and chlorophyll percentages.
- Taxon
- Rice PlantOryza sativat0
- Organ / stage
- leaf-bladese0
- Outcome
- NAR valuese0
- Direction
- declinge0
- Qualifier
- higher percentagese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“in leaf-blades, and rather decling NAR values at the higher percentages.”
t0“Rice Plant”
Claim · model-written summary
The authors suggest forecasting ripening dry-matter production from leaf-blade nitrogen at ripening onset.
- Taxon
- Rice PlantOryza sativat0
- Organ / stage
- leaf-bladese0
- Outcome
- Forecasting of dry matter production in ripening periode0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Forecasting of dry matter production in ripening period seems to be possible by determining the total nitrogen content in total leaf-blades per unit field area at the begining of ripening stage”
t0“Rice Plant”