Abstract
Abstract To investigate the cause of the low productivity per unit amount of nitrogen absorbed in Leguminosae compared to Gramineae, the respiratory rates of shoot, root, and a single leaf of rice and soybean were monitored during the vegetative growth stage at 3 levels of nitrogen application using hydroponic culture. The results obtained were as follows. 1. The respiratory rate of shoot and a single leaf in soybean was higher than that in rice. The growth efficiency [accumulated dry matter/(accumulated dry matter + respiration)] of whole plant of soybean was lower than that of rice, regardless of nitrogen treatment. The low productivity based on nitrogen accumulation in soybean during the vegetative growth stage was ascribed mainly to the higher respiratory activity of shoot and single leaf.2. As the effect of nitrogen application on the growth efficiency in both rice and soybean was negligible, and the nitrogen (protein) content of each organ and whole plant was not always high in soybean, it is suggested that the high respiratory rate in soybean is not due to energy supply for the construction of protein, which is normally considered to account for a major part of growth respiration.3. Nitrogen application rate and temperature did not exert an appreciable effect on growth efficiency. Since, maintenance respiration is generally considered to be affected by the temperature and protein turnover, the contribution of maintenance respiration to total respiration may be negligible.
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Claims 9
Claim · model-written summary
Soybean shoot and leaf respiration exceeded rice.
- Taxon
- soybean
Glycine maxe0 - Organ / stage
- shoot and a single leafe0
- Outcome
- respiratory ratee0
- Direction
- highere0
- Comparator
- ricee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The respiratory rate of shoot and a single leaf in soybean was higher than that in rice.”
Claim · model-written summary
Whole-plant soybean growth efficiency was lower than rice regardless of nitrogen treatment.
- Taxon
- soybeanGlycine maxe0
- Organ / stage
- whole plante0
- Outcome
- growth efficiencye0
- Direction
- lowere0
- Qualifier
- regardless of nitrogen treatmente0
- Comparator
- ricee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The growth efficiency [accumulated dry matter/(accumulated dry matter + respiration)] of whole plant of soybean was lower than that of rice, regardless of nitrogen treatment.”
Claim · model-written summary
The authors attributed soybean’s lower nitrogen-based productivity mainly to higher shoot and leaf respiration.
- Taxon
- soybeanGlycine maxe0
- Organ / stage
- shoot and single leafe0
- Outcome
- low productivity based on nitrogen accumulatione0
- Qualifier
- higher respiratory activity of shoot and single leafe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The low productivity based on nitrogen accumulation in soybean during the vegetative growth stage was ascribed mainly to the higher respiratory activity of shoot and single leaf.”
Claim · model-written summary
Nitrogen application had negligible effect on growth efficiency in rice and soybean.
- Taxon
- rice and soybeanGlycine max
Oryza sativae0 - Treatment
- nitrogen applicatione0
- Outcome
- growth efficiencye0
- Direction
- negligiblee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“As the effect of nitrogen application on the growth efficiency in both rice and soybean was negligible, and the nitrogen (protein) content of each organ and whole plant was not always high in soybean, it is suggested that the high respiratory rate in soybean is not due to energy supply for the construction of protein”
Claim · model-written summary
Soybean organ and whole-plant nitrogen content was not consistently high.
- Taxon
- soybeanGlycine maxe0
- Organ / stage
- each organ and whole plante0
- Outcome
- nitrogen (protein) contente0
- Direction
- not always highe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“As the effect of nitrogen application on the growth efficiency in both rice and soybean was negligible, and the nitrogen (protein) content of each organ and whole plant was not always high in soybean, it is suggested that the high respiratory rate in soybean is not due to energy supply for the construction of protein”
Claim · model-written summary
The authors suggest soybean’s high respiration is not due to protein construction energy.
- Taxon
- soybeanGlycine maxe0
- Outcome
- high respiratory ratee0
- Qualifier
- not due to energy supply for the construction of proteine0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“As the effect of nitrogen application on the growth efficiency in both rice and soybean was negligible, and the nitrogen (protein) content of each organ and whole plant was not always high in soybean, it is suggested that the high respiratory rate in soybean is not due to energy supply for the construction of protein”
Claim · model-written summary
Nitrogen application rate had no appreciable effect on growth efficiency.
- Taxon
- rice and soybeanGlycine maxOryza sativat0
- Treatment
- Nitrogen application ratee0
- Outcome
- growth efficiencye0
- Direction
- did not exert an appreciable effecte0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Nitrogen application rate and temperature did not exert an appreciable effect on growth efficiency.”
t0“rice and soybean”
Claim · model-written summary
Temperature had no appreciable effect on growth efficiency.
- Taxon
- rice and soybeanGlycine maxOryza sativat0
- Treatment
- temperaturee0
- Outcome
- growth efficiencye0
- Direction
- did not exert an appreciable effecte0
Not reportedSetting
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Nitrogen application rate and temperature did not exert an appreciable effect on growth efficiency.”
t0“rice and soybean”
Claim · model-written summary
The authors suggest maintenance respiration contributes negligibly to total respiration.
- Taxon
- rice and soybeanGlycine maxOryza sativat0
- Outcome
- contribution of maintenance respiration to total respiratione0
- Qualifier
- may be negligiblee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the contribution of maintenance respiration to total respiration may be negligible.”
t0“rice and soybean”
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See all 511 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.