Claim · model-written summary
The saturation point of NAR of spring wheat was lower after heading, at about 15 MJ/m2/day.
- Taxon
- spring wheat
Triticum aestivume0 - Treatment
- post-heading stagee1
- Outcome
- saturation point of NARe1
- Direction
- lowere1
- Value
- 15 MJ/m2/daye1
Not reportedMaterialGeneCompoundOrgan / stageInteractorInteractor roleSecond interactorSecond interactor roleComparatorSettingQualifier
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“field-grown spring wheat (cv. Haruyutaka)”
e1“The saturation point of NAR was lower for the post-heading stage (at about 15 MJ/m2/day)”
Title
Effect of shading before and after heading time on growth and yield of spring wheat.
Peiwu WANG; Kimio NAKASEKO Japanese Journal of Crop Science 1986. doi:10.1626/jcs.55.513
Other claims from this paper (19)
- Intervention effect Shading to 70% of natural light for three weeks before heading reduced total dry weight to 75% of unshaded plants.
- Intervention effect Shading to 50% of natural light for three weeks before heading reduced total dry weight to 52% of unshaded plants.
- Intervention effect Shading to 25% of natural light for three weeks before heading reduced total dry weight to 40% of unshaded plants.
- Association Dry weights of each plant part of spring wheat decreased with decreasing light intensity under shading before heading.
- Association Leaf area and surface area of ears and culms of spring wheat decreased under shading.
- Association Under shading, the distribution ratio of dry matter increased in leaves and ears of spring wheat.
- Association Under shading, the distribution ratio of dry matter decreased in roots of spring wheat.
- Intervention effect After shading was stopped, crop growth rate of previously shaded spring wheat increased more than that of unshaded plants, mainly due to increased net assimilation rate.
- Association Net assimilation rate was closely correlated with dry weights of culms and roots of spring wheat (r=0.998).
- Intervention effect Shading to 25% of natural light (75% shade) during the period around heading significantly reduced grain yield of spring wheat by 15%.
- Intervention effect Shading to 70% of natural light for 22 days after heading reduced yield to 88% of unshaded plants.
- Intervention effect Shading to 50% of natural light for 22 days after heading reduced yield to 78% of unshaded plants.
- Intervention effect Shading to 25% of natural light for 22 days after heading reduced yield to 51% of unshaded plants.
- Intervention effect Restricting light after heading caused a greater yield reduction in spring wheat than restricting light before heading.
- Association CGR and NAR of spring wheat decreased in parallel with decreasing light intensity during both shading periods.
- Association Root growth of spring wheat was very flexible in response to light intensity regardless of developmental stage.
- Association Under shading, the percentage decrease in leaf and culm area of spring wheat was lower than the percentage decrease in dry weight.
- Association Green area index of spring wheat did not differ among shading treatments except the 25% light plot.
- Association After heading, dry weights of ears, culms and roots of spring wheat decreased with decreasing light intensity.