Abstract
Abstract Cabbage plants were grown at graded levels of nitrogen supply and light intensity, and the combined effects on cabbage-head development were studied during the spring and autumn seasons. The cabbage-head yield (i.e. dry weight of inner head leaves) was the highest at 50 ppm N in the nutrient solution, followed by 500 and 5 ppm N at full light intensity, and decreased with decrease in the, light intensity by shading. The decrease in cabbage-head yield caused by the shading was greater at high nitrogen levels during the autumn (low solar energy) season than during the spring (high solar energy) season. As the nitrogen supply increased or the light intensity decreased during both the spring and autumn seasons, nitrogen, especially soluble N, accumulated and the carbohydrate (sugar and starch) content decreased in the plants. Cabbage-head development occurred efficiently when the total N content in the outer leaves remained at about 2–3% and the carbohydrate production was large at full light intensity.
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Claims 7
Claim · model-written summary
Cabbage head yield peaked at 50 ppm N under full light.
- Taxon
- Cabbage
Brassica oleracea var. capitatat0 - Treatment
- 50 ppm Ne0
- Outcome
- cabbage-head yielde0
- Direction
- higheste0
- Value
- 50 ppm Ne0
- Qualifier
- full light intensitye0
- Comparator
- 500 and 5 ppm Ne0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The cabbage-head yield (i.e. dry weight of inner head leaves) was the highest at 50 ppm N in the nutrient solution, followed by 500 and 5 ppm N at full light intensity”
t0“cabbage”
Claim · model-written summary
Shading reduced yield more at high nitrogen in autumn than spring.
- Taxon
- cabbageBrassica oleracea var. capitatat0
- Treatment
- shadinge0
- Outcome
- cabbage-head yielde0
- Direction
- decreasee0
- Qualifier
- high nitrogen levels during the autumne0
- Comparator
- springe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The decrease in cabbage-head yield caused by the shading was greater at high nitrogen levels during the autumn (low solar energy) season than during the spring (high solar energy) season”
t0“cabbage”
Claim · model-written summary
Increasing nitrogen supply increased plant nitrogen accumulation.
- Taxon
- cabbageBrassica oleracea var. capitatat0
- Treatment
- nitrogen supply increasede0
- Outcome
- nitrogen, especially soluble N, accumulatede0
- Direction
- accumulatede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“As the nitrogen supply increased or the light intensity decreased during both the spring and autumn seasons, nitrogen, especially soluble N, accumulated and the carbohydrate (sugar and starch) content decreased in the plants”
t0“cabbage”
Claim · model-written summary
Decreasing light increased plant nitrogen accumulation.
- Taxon
- cabbageBrassica oleracea var. capitatat0
- Treatment
- light intensity decreasede0
- Outcome
- nitrogen, especially soluble N, accumulatede0
- Direction
- accumulatede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“As the nitrogen supply increased or the light intensity decreased during both the spring and autumn seasons, nitrogen, especially soluble N, accumulated and the carbohydrate (sugar and starch) content decreased in the plants”
t0“cabbage”
Claim · model-written summary
Increasing nitrogen supply decreased carbohydrate content.
- Taxon
- cabbageBrassica oleracea var. capitatat0
- Treatment
- nitrogen supply increasede0
- Outcome
- carbohydrate (sugar and starch) contente0
- Direction
- decreasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“As the nitrogen supply increased or the light intensity decreased during both the spring and autumn seasons, nitrogen, especially soluble N, accumulated and the carbohydrate (sugar and starch) content decreased in the plants”
t0“cabbage”
Claim · model-written summary
Decreasing light decreased carbohydrate content.
- Taxon
- cabbageBrassica oleracea var. capitatat0
- Treatment
- light intensity decreasede0
- Outcome
- carbohydrate (sugar and starch) contente0
- Direction
- decreasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“As the nitrogen supply increased or the light intensity decreased during both the spring and autumn seasons, nitrogen, especially soluble N, accumulated and the carbohydrate (sugar and starch) content decreased in the plants”
t0“cabbage”
Claim · model-written summary
Head development was efficient near 2–3% outer leaf nitrogen with large carbohydrate production in full light.
- Taxon
- CabbageBrassica oleracea var. capitatae0
- Organ / stage
- outer leavese0
- Outcome
- Cabbage-head developmente0
- Direction
- efficientlye0
- Value
- 2–3%e0
- Qualifier
- carbohydrate production was large at full light intensitye0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Cabbage-head development occurred efficiently when the total N content in the outer leaves remained at about 2–3% and the carbohydrate production was large at full light intensity”
The same questions in other papers
nitrogen · yield · Brassica oleracea (wild cabbage)Results differ
143 papers in the same direction as this paper · 17 in the opposite direction · 3 reporting no difference from an alternative
- positive
- negative
- no effect
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See all 164 papers →light · quality: sugar starch · Brassica oleracea (wild cabbage)Positive and negative results
2 papers in the same direction as this paper · 2 in the opposite direction
- positive
- positive
- negative
1 paper more in this group
See all 5 papers →shade · yield · Brassica oleracea (wild cabbage)Positive and negative results
1 paper in the same direction as this paper · 4 in the opposite direction
- positive
- positive
- positive
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See all 6 papers →nitrogen · quality: sugar starch · Brassica oleracea (wild cabbage)Positive and negative results
1 paper in the same direction as this paper · 6 in the opposite direction
- positive
- positive
- positive
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See all 8 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.