Abstract
Nitrogen availability and illumination intensity are two key factors which affect rice growth. However, their influences on total nitrogen accumulation, photosynthetic rate, root morphologies, and yields are not fully understood. We conducted two field experiments to (1) evaluate the effects of shading under different N treatments on photosynthetic parameters, root morphologies, total nutrient accumulation, and grain yields of rice; and (2) elucidate the relationship between total nutrient accumulation and root morphologies under different shading conditions and nitrogen treatments. Three nitrogen rates, three shading treatments, and three different rice cultivars were used in two field experiments. Double shading during the grain-filling stage decreased total nutrient accumulation, altered root morphological characteristics, and decreased yields in rice. There were also significant interaction effects between nitrogen and shading on photosynthetic rate, transpiration rate, and total root length, root superficial area, and root volume. Significant interactions were found among cultivars and shading for photosynthetic rate and transpiration rate. Correlation analysis revealed that total nitrogen accumulation (TNA) and potassium accumulation (TKA) were significantly positively correlated with total root length, root superficial area, and root volume. N application could alleviate the detrimental effects of shading on total nutrient accumulation and grain yield in rice.
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Claims 10
Claim · model-written summary
Double shading during grain filling decreased total nutrient accumulation.
- Taxon
- rice
Oryza sativae0 - Organ / stage
- grain-filling stagee0
- Treatment
- Double shadinge0
- Outcome
- total nutrient accumulatione0
- Direction
- decreasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Double shading during the grain-filling stage decreased total nutrient accumulation, altered root morphological characteristics, and decreased yields in rice”
Claim · model-written summary
Double shading altered root morphology.
- Taxon
- riceOryza sativae0
- Organ / stage
- grain-filling stagee0
- Treatment
- Double shadinge0
- Outcome
- root morphological characteristicse0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Double shading during the grain-filling stage decreased total nutrient accumulation, altered root morphological characteristics, and decreased yields in rice”
Claim · model-written summary
Double shading decreased rice yield.
- Taxon
- riceOryza sativae0
- Organ / stage
- grain-filling stagee0
- Treatment
- Double shadinge0
- Outcome
- yieldse0
- Direction
- decreasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Double shading during the grain-filling stage decreased total nutrient accumulation, altered root morphological characteristics, and decreased yields in rice”
Claim · model-written summary
Nitrogen and shading significantly interacted for photosynthetic and transpiration rates.
- Taxon
- RiceOryza sativat0
- Treatment
- nitrogen and shadinge0
- Outcome
- photosynthetic rate, transpiration ratee0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“significant interaction effects between nitrogen and shading on photosynthetic rate, transpiration rate, and total root length, root superficial area, and root volume”
t0“Rice Genotypes”
Claim · model-written summary
Nitrogen and shading significantly interacted for root length, area, and volume.
- Taxon
- RiceOryza sativat0
- Treatment
- nitrogen and shadinge0
- Outcome
- total root length, root superficial area, and root volumee0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“significant interaction effects between nitrogen and shading on photosynthetic rate, transpiration rate, and total root length, root superficial area, and root volume”
t0“Rice Genotypes”
Claim · model-written summary
Cultivar and shading significantly interacted for photosynthetic and transpiration rates.
- Taxon
- RiceOryza sativat0
- Material
- cultivarse0
- Treatment
- shadinge0
- Outcome
- photosynthetic rate and transpiration ratee0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Significant interactions were found among cultivars and shading for photosynthetic rate and transpiration rate”
t0“Rice Genotypes”
Claim · model-written summary
Nitrogen accumulation correlated positively with root length, area, and volume.
- Taxon
- RiceOryza sativat0
- Organ / stage
- roote0
- Outcome
- total nitrogen accumulatione0
- Direction
- positively correlatede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“total nitrogen accumulation (TNA) and potassium accumulation (TKA) were significantly positively correlated with total root length, root superficial area, and root volume”
t0“Rice Genotypes”
Claim · model-written summary
Potassium accumulation correlated positively with root length, area, and volume.
- Taxon
- RiceOryza sativat0
- Organ / stage
- roote0
- Outcome
- potassium accumulatione0
- Direction
- positively correlatede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“total nitrogen accumulation (TNA) and potassium accumulation (TKA) were significantly positively correlated with total root length, root superficial area, and root volume”
t0“Rice Genotypes”
Claim · model-written summary
Nitrogen application alleviated shade-related loss of nutrient accumulation.
- Taxon
- riceOryza sativae0
- Treatment
- N applicatione0
- Outcome
- total nutrient accumulatione0
- Direction
- alleviatee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“N application could alleviate the detrimental effects of shading on total nutrient accumulation and grain yield in rice”
Claim · model-written summary
Nitrogen application alleviated shade-related grain yield loss.
- Taxon
- riceOryza sativae0
- Treatment
- N applicatione0
- Outcome
- grain yielde0
- Direction
- alleviatee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“N application could alleviate the detrimental effects of shading on total nutrient accumulation and grain yield in rice”
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