Abstract
Abstract Utilization of assimilates for growth and maintenance of tops and roots of Lolium multiflorum was determined for plants supplied with either nitrate or ammonium. Carbon dioxide exchange rates were measured continuously for tops and roots separately. Three‐day periods were applied for two irradiation levels. On the last day of each three‐day period no nitrogen was supplied to the two treatments. In the nitrate treatment, the coefficient of utilization for converting assimilates into constructive growth ( Y G ) remained unaffected in absence of nitrate. However, in absence of nitrate the maintenance respiration ( M ) for both tops and roots was only one third of that in presence of nitrate. In the treatment with ammonium the maintenance respiration of the plants was not influenced by the absence of ammonium. However, especially for the tops Y G increased in absence of ammonium. In both the treatments, growth respiration of the roots was inefficient compared to that of the tops. Only in the case of absence of nitrate, maintenance respiration of the roots was similar to that of the tops.
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Claims 7
Claim · model-written summary
In nitrate treatment, growth conversion efficiency remained unaffected by nitrate absence.
- Taxon
- Lolium multiflorum
Lolium multiflorumt0 - Treatment
- absence of nitratee0
- Outcome
- coefficient of utilization for converting assimilates into constructive growthe0
- Direction
- remained unaffectede0
- Comparator
- nitrate treatmente0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In the nitrate treatment, the coefficient of utilization for converting assimilates into constructive growth ( Y G ) remained unaffected in absence of nitrate.”
t0“Lolium multiflorum”
Claim · model-written summary
Without nitrate, top maintenance respiration was one third of the nitrate-present value.
- Taxon
- Lolium multiflorumLolium multiflorumt0
- Organ / stage
- topse0
- Treatment
- absence of nitratee0
- Outcome
- maintenance respiratione0
- Direction
- one thirde0
- Value
- one thirde0
- Comparator
- presence of nitratee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“in absence of nitrate the maintenance respiration ( M ) for both tops and roots was only one third of that in presence of nitrate.”
t0“Lolium multiflorum”
Claim · model-written summary
Without nitrate, root maintenance respiration was one third of the nitrate-present value.
- Taxon
- Lolium multiflorumLolium multiflorumt0
- Organ / stage
- rootse0
- Treatment
- absence of nitratee0
- Outcome
- maintenance respiratione0
- Direction
- one thirde0
- Value
- one thirde0
- Comparator
- presence of nitratee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“in absence of nitrate the maintenance respiration ( M ) for both tops and roots was only one third of that in presence of nitrate.”
t0“Lolium multiflorum”
Claim · model-written summary
Absence of ammonium did not influence plant maintenance respiration.
- Taxon
- Lolium multiflorumLolium multiflorumt0
- Treatment
- absence of ammoniume0
- Outcome
- maintenance respiratione0
- Direction
- not influencede0
- Comparator
- treatment with ammoniume0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In the treatment with ammonium the maintenance respiration of the plants was not influenced by the absence of ammonium.”
t0“Lolium multiflorum”
Claim · model-written summary
Growth conversion efficiency increased without ammonium, especially in tops.
- Taxon
- Lolium multiflorumLolium multiflorumt0
- Organ / stage
- topse0
- Treatment
- absence of ammoniume0
- Outcome
- Y Ge0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“especially for the tops Y G increased in absence of ammonium.”
t0“Lolium multiflorum”
Claim · model-written summary
Root growth respiration was inefficient relative to tops in both treatments.
- Taxon
- Lolium multiflorumLolium multiflorumt0
- Organ / stage
- rootse0
- Outcome
- growth respiratione0
- Direction
- inefficiente0
- Comparator
- topse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In both the treatments, growth respiration of the roots was inefficient compared to that of the tops.”
t0“Lolium multiflorum”
Claim · model-written summary
Root maintenance respiration resembled top maintenance respiration only without nitrate.
- Taxon
- Lolium multiflorumLolium multiflorumt0
- Organ / stage
- rootse0
- Outcome
- maintenance respiratione0
- Direction
- similare0
- Qualifier
- absence of nitratee0
- Comparator
- topse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Only in the case of absence of nitrate, maintenance respiration of the roots was similar to that of the tops.”
t0“Lolium multiflorum”
The same questions in other papers
nitrogen · growth · Lolium multiflorum (Italian ryegrass)Positive and negative results
1 paper in the same direction as this paper · 9 reporting no difference from an alternative
- positive
- positive
- positive
7 papers more in this group
See all 11 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.