Abstract
Authors examined the relation between the illumination by the all-night street fluorescent lamps, and its effects on the growth and yields of paddy rice. The results obtained are as follows: 1. In case of 2 luxes or less, neither the growth nor the yields were affected at all, but in case of 5 luxes, they were affected, though quite slightly, while in case of 10 luxes or more, they were affected markedly, and in case where the all-night illumimation exceeds 50 luxes, the yields were completely nil. In an extreme case of as high as 70 luxes or more, rice plants never even came int o ears. 2. The plant growth stage affected most remarkably by all night illumination was the duration from the 40th to the 20th day before the heading, which corresponds to the duration of 20 days after the differentiating stage of flag-leaf primodium. 3. The varietal differences in the delaying effect on the heading dates caused by all-night illumination are given belows. The growth and the yields of the extremely early maturing varieties for the early season cultivation (Honenwase, Reimei) were affected quite slightly. However, considerable injuries caused by night illumination were observed in those for ordinary season cultivation, i.e., the early maturing (Yamahosi, Ukonnisiki), the middle maturing (Harima, Kinmaze), and late maturing varieties (Siranui, Tokai No. 28). Among them the early maturing varieties were affected most seriously by all-night illumination. And in any cases, the varietal differences were also confirmed clearly. 4. Among varieties for ordinary season cultivation, which were greatly affected by illumination and showed the great delay in the heading, authors could discover some individuals which were affected little by all-night illumination. By examining the characteristics of their subsequent generations, it was found that they were the very strains which could bear ears and fruits even under a considerably high illumination. This phenomenon is meaningful, because the study on such an ecotype may suggest the possibility of breeding up some non-responsible varieties to all-night illumination.
Abstract from the paper’s OpenAlex record, shown for indexing and research. Copyright remains with the authors or the publisher. Read at the source ↗
The text the model read, with the source record’s inline markup (italics, sub- and superscripts) rendered and its character entities decoded; quote offsets refer to the raw text.
Claims 10
Claim · model-written summary
At 2 lux or less of all-night illumination neither growth nor yield of paddy rice was affected.
- Taxon
- Paddy Ricet0
- Treatment
- 2 luxes or lesse1
- Outcome
- growth nor the yieldse1
- Direction
- no_changeinferrede1
- Value
- 2 luxes or lesse1
Not reportedComparator
Verbatim
t0“Paddy Rice”
e1“In case of 2 luxes or less, neither the growth nor the yields were affected at all”
Claim · model-written summary
At 5 lux of all-night illumination growth and yield of paddy rice were affected, though quite slightly.
Not reportedComparatorOutcomeDirection
Verbatim
t0“Paddy Rice”
e2“in case of 5 luxes, they were affected, though quite slightly”
Claim · model-written summary
At 10 lux or more of all-night illumination growth and yield of paddy rice were affected markedly.
Not reportedComparatorOutcomeDirection
Verbatim
t0“Paddy Rice”
e3“in case of 10 luxes or more, they were affected markedly”
Claim · model-written summary
When all-night illumination exceeded 50 lux, rice yields were completely nil.
Not reportedComparator
Verbatim
t0“Paddy Rice”
e4“in case where the all-night illumimation exceeds 50 luxes, the yields were completely nil”
Claim · model-written summary
At 70 lux or more of all-night illumination rice plants never came into ear.
Not reportedComparatorDirection
Verbatim
t0“Paddy Rice”
e5“as high as 70 luxes or more, rice plants never even came int o ears”
Claim · model-written summary
The growth stage most affected by all-night illumination was the period from the 40th to the 20th day before heading.
Verbatim
t0“Paddy Rice”
e6“The plant growth stage affected most remarkably by all night illumination was the duration from the 40th to the 20th day before the heading”
Claim · model-written summary
Ordinary-season varieties (early, middle and late maturing) suffered considerable injuries from night illumination.
- Taxon
- Paddy Ricet0
- Material
- the early maturing (Yamahosi, Ukonnisiki), the middle maturing (Harima, Kinmaze), and late maturing varieties (Siranui, Tokai No. 28)e1
- Treatment
- night illuminatione1
- Outcome
- considerable injuriese1
Not reportedComparatorDirection
Verbatim
t0“Paddy Rice”
e1“considerable injuries caused by night illumination were observed in those for ordinary season cultivation, i.e., the early maturing (Yamahosi, Ukonnisiki), the middle maturing (Harima, Kinmaze), and late maturing varieties (Siranui, Tokai No. 28)”
Claim · model-written summary
Among ordinary-season varieties the early maturing varieties were affected most seriously by all-night illumination.
- Taxon
- Paddy Ricet0
- Material
- early maturing varietiese1
- Treatment
- all-night illuminatione1
- Outcome
- affected most seriouslye1
Not reportedComparatorDirection
Verbatim
t0“Paddy Rice”
e1“Among them the early maturing varieties were affected most seriously by all-night illumination”
Claim · model-written summary
Some individuals little affected by all-night illumination were found, and their subsequent generations could bear ears and fruits even under considerably high illumination.
Verbatim
t0“Paddy Rice”
e1“authors could discover some individuals which were affected little by all-night illumination”
e2“they were the very strains which could bear ears and fruits even under a considerably high illumination”
Claim · model-written summary
The authors suggest that studying such an ecotype may open the possibility of breeding varieties not responsive to all-night illumination.
Verbatim
t0“Paddy Rice”
e1“the study on such an ecotype may suggest the possibility of breeding up some non-responsible varieties to all-night illumination”
The same questions in other papers
light · crop injury · Oryza sativa (rice)Results agree
4 papers in the same direction as this paper
- negative
- negative
- negative
1 paper more in this group
See all 5 papers →Claims are grouped by organism, treatment and what was measured or targeted. A paper counts as positive when any of its claims in the group is positive.