Abstract
When averaged over a wide range in soil nitrogen and moisture conditions, cultivar differences in yield and protein content of non-inoculated field peas (Pisum sativum L.) were relatively small. The inherent differences in seed weight were responsible for most of the variations in yield among the three cultivars. Nitrogen fertilization in the growth room experiment markedly increased plant weight, seed yield and protein content, and water-use efficiency was substantially improved. When maintained within the upper half of the available range, soil moisture supply had only a limited influence on plant growth. Periodic wilting did cause a severe reduction in plant weight and seed yield, but there was little change in protein content. For these fertilizer and moisture treatments, responses in seed yield were primarily due to changes in number of pods per plant; the seeds per pod and seed weight were relatively stable. It appeared that field peas were efficient converters of soil nitrogen to seed protein and, in the absence of nitrogen-fixing bacteria, nitrogen fertilization was the principal factor influencing the protein content of field peas. The correlation coefficient between yield and protein content was very low.
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Claims 10
Claim · model-written summary
Cultivar differences in yield and protein were relatively small across soil nitrogen and moisture conditions.
Verbatim
e0“cultivar differences in yield and protein content of non-inoculated field peas (Pisum sativum L.) were relatively small”
Claim · model-written summary
Inherent seed weight differences explained most yield variation among three cultivars.
Not reportedDirection
Verbatim
e0“The inherent differences in seed weight were responsible for most of the variations in yield among the three cultivars.”
t0“FIELD PEAS”
Claim · model-written summary
Nitrogen fertilization markedly increased pea plant weight, seed yield and protein content in the growth room.
- Taxon
- field peast0
- Treatment
- Nitrogen fertilizatione0
- Outcome
- plant weight, seed yield and protein contente0
- Direction
- markedly increasede0
- Setting
- growth roome0
Not reportedComparator
Verbatim
e0“Nitrogen fertilization in the growth room experiment markedly increased plant weight, seed yield and protein content”
t0“FIELD PEAS”
Claim · model-written summary
Nitrogen fertilization substantially improved water-use efficiency.
- Taxon
- FIELD PEASt0
- Treatment
- Nitrogen fertilizatione0
- Outcome
- water-use efficiencye0
- Direction
- substantially improvede0
Not reportedComparator
Verbatim
e0“Nitrogen fertilization in the growth room experiment markedly increased plant weight, seed yield and protein content, and water-use efficiency was substantially improved.”
t0“FIELD PEAS”
Claim · model-written summary
Soil moisture in the upper half of its available range had limited influence on pea growth.
- Taxon
- FIELD PEASt0
- Treatment
- soil moisture supplye0
- Outcome
- plant growthe0
- Direction
- only a limited influencee0
- Qualifier
- upper half of the available rangee0
Not reportedComparator
Verbatim
e0“When maintained within the upper half of the available range, soil moisture supply had only a limited influence on plant growth.”
t0“FIELD PEAS”
Claim · model-written summary
Periodic wilting severely reduced pea plant weight and seed yield.
- Taxon
- FIELD PEASt0
- Treatment
- Periodic wiltinge0
- Outcome
- plant weight and seed yielde0
- Direction
- severe reductione0
Not reportedComparator
Verbatim
e0“Periodic wilting did cause a severe reduction in plant weight and seed yield”
t0“FIELD PEAS”
Claim · model-written summary
Periodic wilting caused little change in pea protein content.
Not reportedComparator
Verbatim
e0“Periodic wilting did cause a severe reduction in plant weight and seed yield, but there was little change in protein content”
t0“FIELD PEAS”
Claim · model-written summary
Seed yield responses to fertilizer and moisture primarily reflected pods per plant, while seeds per pod and seed weight remained relatively stable.
Not reportedDirection
Verbatim
e0“For these fertilizer and moisture treatments, responses in seed yield were primarily due to changes in number of pods per plant; the seeds per pod and seed weight were relatively stable.”
t0“FIELD PEAS”
Claim · model-written summary
In the absence of nitrogen-fixing bacteria, nitrogen fertilization was the principal factor influencing pea protein content.
Not reportedDirection
Verbatim
e0“in the absence of nitrogen-fixing bacteria, nitrogen fertilization was the principal factor influencing the protein content of field peas”
Claim · model-written summary
The yield–protein content correlation was very low in field peas.
Not reportedOrgan / stageDirection
Verbatim
e0“The correlation coefficient between yield and protein content was very low.”
t0“FIELD PEAS”
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