Abstract
Transplanted and direct-seeded flooded rice were compared in a field experiment using identical planting density and geometry. Leaf area index (LAI), plant dry weight, and tiller number were determined at 7-14 d intervals from seeding to maturity. Canopy CO2 and H2O exchange were measured using a mobile depletion-chamber system which requires 1-1.5 minutes per measurement. The canopy CO2 assimilation rates confirmed the plant dry matter accumulation observed. Diurnal measurements of net CO2 assimilation and night respiration indicated a mild midday/afternoon depression that depended on the atmospheric vapour pressure deficit (VPD). Light response of canopy CO2 assimilation exhibited light saturation at full daylight when LAI was lower than 1. No light saturation was observed at higher LAI. Transplanting shock in transplanted rice reduced net assimilation rates and delayed foliage expansion and tillering by 15 days. Crop development was retarded by 7 days. Uninhibited growth of direct-seeded rice during the vegetative stage led to superior biological yield and tiller number at maturity while grain yield was equal to that of transplanted rice. Potential yield increase in direct-seeded flooded rice is discussed on the basis of growth kinetics and assimilate source/sink relationships.
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Claims 10
Claim · model-written summary
Transplanting shock reduced net assimilation rates of transplanted rice compared with direct-seeded rice in a field experiment.
- Taxon
- rice
Oryza sativae0 - Treatment
- Transplanting shocke1
- Outcome
- net assimilation ratese1
- Direction
- reducede1
- Comparator
- direct-seedede0
- Setting
- field experimente0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Transplanted and direct-seeded flooded rice were compared in a field experiment using identical planting density and geometry. Leaf area index (LAI), plant dry weight, and tiller number were determined at 7-14 d intervals from seeding to maturity. Canopy CO2 and H2O exchange were measured using a mobile depletion-chamber system which requires 1-1.5 minutes per measurement”
e1“Transplanting shock in transplanted rice reduced net assimilation rates”
Claim · model-written summary
Transplanting shock delayed foliage expansion and tillering of transplanted rice by 15 days.
- Taxon
- riceOryza sativae0
- Treatment
- Transplanting shocke1
- Outcome
- foliage expansion and tilleringe2
- Direction
- delayede2
- Value
- 15 dayse2
- Comparator
- direct-seedede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Transplanted and direct-seeded flooded rice were compared in a field experiment using identical planting density and geometry. Leaf area index (LAI), plant dry weight, and tiller number were determined at 7-14 d intervals from seeding to maturity. Canopy CO2 and H2O exchange were measured using a mobile depletion-chamber system which requires 1-1.5 minutes per measurement”
e1“Transplanting shock in transplanted rice reduced net assimilation rates”
e2“delayed foliage expansion and tillering by 15 days”
Claim · model-written summary
Transplanting shock retarded crop development of transplanted rice by 7 days.
- Taxon
- riceOryza sativae0
- Treatment
- Transplanting shocke1
- Outcome
- Crop developmente3
- Direction
- retardede3
- Value
- 7 dayse3
- Comparator
- direct-seedede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Transplanted and direct-seeded flooded rice were compared in a field experiment using identical planting density and geometry. Leaf area index (LAI), plant dry weight, and tiller number were determined at 7-14 d intervals from seeding to maturity. Canopy CO2 and H2O exchange were measured using a mobile depletion-chamber system which requires 1-1.5 minutes per measurement”
e1“Transplanting shock in transplanted rice reduced net assimilation rates”
e3“Crop development was retarded by 7 days”
Claim · model-written summary
Direct-seeded rice had superior biological yield and tiller number at maturity compared with transplanted rice.
- Taxon
- riceOryza sativae0
- Organ / stage
- vegetative stagee4
- Treatment
- direct-seedede4
- Outcome
- biological yield and tiller numbere4
- Direction
- superiore4
- Comparator
- Transplantede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Transplanted and direct-seeded flooded rice were compared in a field experiment using identical planting density and geometry. Leaf area index (LAI), plant dry weight, and tiller number were determined at 7-14 d intervals from seeding to maturity. Canopy CO2 and H2O exchange were measured using a mobile depletion-chamber system which requires 1-1.5 minutes per measurement”
e4“Uninhibited growth of direct-seeded rice during the vegetative stage led to superior biological yield and tiller number at maturity”
Claim · model-written summary
Grain yield of direct-seeded rice was equal to that of transplanted rice.
- Taxon
- riceOryza sativae0
- Treatment
- direct-seedede4
- Outcome
- grain yielde5
- Direction
- equale5
- Comparator
- transplanted ricee5
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Transplanted and direct-seeded flooded rice were compared in a field experiment using identical planting density and geometry. Leaf area index (LAI), plant dry weight, and tiller number were determined at 7-14 d intervals from seeding to maturity. Canopy CO2 and H2O exchange were measured using a mobile depletion-chamber system which requires 1-1.5 minutes per measurement”
e4“Uninhibited growth of direct-seeded rice during the vegetative stage led to superior biological yield and tiller number at maturity”
e5“grain yield was equal to that of transplanted rice”
Claim · model-written summary
Canopy CO2 assimilation rates were consistent with the plant dry matter accumulation observed in rice.
- Taxon
- riceOryza sativae0
- Outcome
- plant dry matter accumulatione6
- Qualifier
- canopy CO2 assimilation rates confirmede6
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Transplanted and direct-seeded flooded rice were compared in a field experiment using identical planting density and geometry. Leaf area index (LAI), plant dry weight, and tiller number were determined at 7-14 d intervals from seeding to maturity. Canopy CO2 and H2O exchange were measured using a mobile depletion-chamber system which requires 1-1.5 minutes per measurement”
e6“The canopy CO2 assimilation rates confirmed the plant dry matter accumulation observed. Diurnal measurements of net CO2 assimilation and night respiration indicated a mild midday/afternoon depression that depended on the atmospheric vapour pressure deficit (VPD)”
Claim · model-written summary
Diurnal canopy net CO2 assimilation of rice showed a mild midday/afternoon depression that depended on the vapour pressure deficit.
- Taxon
- riceOryza sativae0
- Outcome
- net CO2 assimilatione6
- Qualifier
- mild midday/afternoon depression that depended on the atmospheric vapour pressure deficit (VPD)e6
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Transplanted and direct-seeded flooded rice were compared in a field experiment using identical planting density and geometry. Leaf area index (LAI), plant dry weight, and tiller number were determined at 7-14 d intervals from seeding to maturity. Canopy CO2 and H2O exchange were measured using a mobile depletion-chamber system which requires 1-1.5 minutes per measurement”
e6“The canopy CO2 assimilation rates confirmed the plant dry matter accumulation observed. Diurnal measurements of net CO2 assimilation and night respiration indicated a mild midday/afternoon depression that depended on the atmospheric vapour pressure deficit (VPD)”
Claim · model-written summary
Canopy CO2 assimilation of rice exhibited light saturation at full daylight when LAI was lower than 1.
- Taxon
- riceOryza sativae0
- Outcome
- light saturatione7
- Qualifier
- at full daylight when LAI was lower than 1e7
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Transplanted and direct-seeded flooded rice were compared in a field experiment using identical planting density and geometry. Leaf area index (LAI), plant dry weight, and tiller number were determined at 7-14 d intervals from seeding to maturity. Canopy CO2 and H2O exchange were measured using a mobile depletion-chamber system which requires 1-1.5 minutes per measurement”
e7“Light response of canopy CO2 assimilation exhibited light saturation at full daylight when LAI was lower than 1. No light saturation was observed at higher LAI”
Claim · model-written summary
No light saturation of canopy CO2 assimilation of rice was observed at higher LAI.
- Taxon
- riceOryza sativae0
- Outcome
- light saturatione7
- Qualifier
- at higher LAIe7
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Transplanted and direct-seeded flooded rice were compared in a field experiment using identical planting density and geometry. Leaf area index (LAI), plant dry weight, and tiller number were determined at 7-14 d intervals from seeding to maturity. Canopy CO2 and H2O exchange were measured using a mobile depletion-chamber system which requires 1-1.5 minutes per measurement”
e7“Light response of canopy CO2 assimilation exhibited light saturation at full daylight when LAI was lower than 1. No light saturation was observed at higher LAI”
Claim · model-written summary
Canopy CO2 and H2O exchange measurement with the mobile depletion-chamber system requires 1-1.5 minutes per measurement.
Verbatim
e0“Transplanted and direct-seeded flooded rice were compared in a field experiment using identical planting density and geometry. Leaf area index (LAI), plant dry weight, and tiller number were determined at 7-14 d intervals from seeding to maturity. Canopy CO2 and H2O exchange were measured using a mobile depletion-chamber system which requires 1-1.5 minutes per measurement”
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