Claim · model-written summary
Shading decreased leaf area index (L) in 1968.
- Taxon
- sugar beet
Beta vulgaris subsp. vulgarise0 - Treatment
- Shadinge1
- Outcome
- Le1
- Direction
- decreasede1
- Qualifier
- in 1968e1
Not reportedMaterialGeneCompoundOrgan / stageInteractorInteractor roleSecond interactorSecond interactor roleComparatorSettingValue
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In 1967 and 1968 plots of sugar beet in two identically grown crops were shaded for successive four week periods”
e1“Shading decreased the incoming radiation by 56%; it decreased E proportionally in 1967, increasing L slightly, but it decreased both E (by 44%) and L in 1968”
Title
D. J. WATSON; TERUHISA MOTOMATSU; K. LOACH; et al. Annals of Applied Biology 1972. doi:10.1111/j.1744-7348.1972.tb02950.x
Other claims from this paper (19)
- Intervention effect Shading decreased incoming radiation by 56%.
- Intervention effect Shading decreased net assimilation rate (E) proportionally in 1967.
- Intervention effect Shading decreased net assimilation rate (E) by 44% in 1968.
- Intervention effect Shading slightly increased leaf area index (L) in 1967.
- Intervention effect Shaded crops had consistently smaller root dry matter and sugar weights at the end of shading and at final harvest in both years.
- Association Final-harvest weights of roots were proportional to radiation received between June and September over all shading treatments.
- Intervention effect Shading did not change the sugar content percentage of dry matter except in early growth.
- Intervention effect Shading decreased root sugar content as percentage of fresh weight, because water content rose relative to dry matter.
- Intervention effect Sugar yield of shaded plants was less because root dry weights were lower, not because sugar partitioning changed.
- Mechanism A root mechanism appears to maintain a nearly constant proportion of sucrose to non-sugar over a wide range of photosynthate supply.
- Intervention effect Under continuous shading, root sugar percentage of dry matter fell only from 80 to 70%.
- Intervention effect Extra nitrogen at the start of shading increased leaf area index (L) in all periods in 1967.
- Intervention effect Extra nitrogen increased the dry weight of the tops in 1967.
- Intervention effect Extra nitrogen had no effect on root dry weight in 1967.
- Intervention effect Irrigation and additional nitrogen decreased root sugar content as percentage of fresh weight only by altering water content.
- Intervention effect Irrigation and additional nitrogen did not change sugar percentage of dry matter.
- Intervention effect In 1968 irrigation had no effect on E or L, apart from a slight increase in L in the first period.
- Intervention effect In 1968 irrigation had no effect on plant dry weight.
- Association Yields of dry matter and sugar of the unshaded crop were similar in the two years.