Abstract
In this trial the nitrate concentration of the nutrient solution affected the rate of DM production only when it fell below 0.2 mM. Between 0.2 and 1.5 mM the chemical composition of the plant was altered considerably but production was not affected. The soluble carbohydrate content, which reached a very high value in the above-ground parts when the nitrate supply was low, fell as the nitrate concentration rose; the same tendency was observed in the crude-fibre content and some unidentified components, probably hemicelluloses and pentosans. The organic-N fraction increased with increasing nitrate concentration in the above range. Above 1.5 mM the effect was virtually confined to the plant nitrate concentration, and there was always a definite relationship between the nitrate content and the soluble-carbohydrate content. The optimum temp, for DM production increased with increasing light intensity.-R.B. (Abstract retrieved from CAB Abstracts by CABI’s permission)
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Claims 9
Claim · model-written summary
Nitrate concentration below 0.2 mM decreased the rate of dry matter production of Lolium perenne.
- Taxon
- Lolium perenne
Lolium perennet0 - Treatment
- the nitrate concentration of the nutrient solutione1
- Outcome
- rate of DM productione1
- Direction
- decreaseinferrede1
- Value
- 0.2 mMe1
- Qualifier
- only when it fell belowe1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“the nitrate concentration of the nutrient solution affected the rate of DM production only when it fell below 0.2 mM”
t0“Lolium perenne L.”
Claim · model-written summary
Between 0.2 and 1.5 mM nitrate altered the chemical composition of Lolium perenne.
- Taxon
- Lolium perenneLolium perennet0
- Treatment
- Between 0.2 and 1.5 mMe2
- Outcome
- chemical composition of the plante2
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e2“Between 0.2 and 1.5 mM the chemical composition of the plant was altered considerably but production was not affected”
t0“Lolium perenne L.”
Claim · model-written summary
Between 0.2 and 1.5 mM nitrate did not affect dry matter production of Lolium perenne.
- Taxon
- Lolium perenneLolium perennet0
- Treatment
- Between 0.2 and 1.5 mMe2
- Outcome
- productione2
- Direction
- not affectede2
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e2“Between 0.2 and 1.5 mM the chemical composition of the plant was altered considerably but production was not affected”
t0“Lolium perenne L.”
Claim · model-written summary
Soluble carbohydrate content in the above-ground parts fell as nitrate concentration rose.
- Taxon
- Lolium perenneLolium perennet0
- Organ / stage
- above-ground partse3
- Treatment
- nitrate concentratione3
- Outcome
- soluble carbohydrate contente3
- Direction
- felle3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e3“The soluble carbohydrate content, which reached a very high value in the above-ground parts when the nitrate supply was low, fell as the nitrate concentration rose”
t0“Lolium perenne L.”
Claim · model-written summary
Crude-fibre content decreased as nitrate concentration rose.
- Taxon
- Lolium perenneLolium perennet0
- Treatment
- nitrate concentratione3
- Outcome
- crude-fibre contente4
- Direction
- decreaseinferrede4
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e4“the same tendency was observed in the crude-fibre content and some unidentified components, probably hemicelluloses and pentosans”
e3“fell as the nitrate concentration rose”
t0“Lolium perenne L.”
Claim · model-written summary
The organic-N fraction increased with increasing nitrate concentration in the range above 0.2 mM and up to 1.5 mM.
- Taxon
- Lolium perenneLolium perennet0
- Treatment
- increasing nitrate concentratione5
- Outcome
- organic-N fractione5
- Direction
- increasede5
- Qualifier
- in the above rangee5
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e5“The organic-N fraction increased with increasing nitrate concentration in the above range”
t0“Lolium perenne L.”
Claim · model-written summary
Above 1.5 mM nitrate, the effect was virtually confined to plant nitrate concentration.
- Taxon
- Lolium perenneLolium perennet0
- Outcome
- plant nitrate concentratione6
- Qualifier
- Above 1.5 mMe6
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e6“Above 1.5 mM the effect was virtually confined to the plant nitrate concentration, and there was always a definite relationship between the nitrate content and the soluble-carbohydrate content”
t0“Lolium perenne L.”
Claim · model-written summary
Above 1.5 mM nitrate, plant nitrate content and soluble carbohydrate content were always definitely related.
- Taxon
- Lolium perenneLolium perennet0
- Treatment
- Above 1.5 mMe6
- Outcome
- the nitrate content and the soluble-carbohydrate contente6
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e6“Above 1.5 mM the effect was virtually confined to the plant nitrate concentration, and there was always a definite relationship between the nitrate content and the soluble-carbohydrate content”
t0“Lolium perenne L.”
Claim · model-written summary
The optimum temperature for dry matter production of Lolium perenne increased with increasing light intensity.
- Taxon
- Lolium perenneLolium perennet0
- Treatment
- increasing light intensitye7
- Outcome
- optimum tempe7
- Direction
- increasede7
- Qualifier
- DM productione7
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e7“The optimum temp, for DM production increased with increasing light intensity”
t0“Lolium perenne L.”
The same questions in other papers
nitrogen · yield · Lolium perenne (perennial ryegrass)Results differ
14 papers in the same direction as this paper · 44 in the opposite direction
- negative
- positive
- positive
55 papers more in this group
See all 59 papers →fertilization · yield · Lolium perenne (perennial ryegrass)Positive and negative results
13 papers in the same direction as this paper · 26 in the opposite direction
- positive
- positive
- positive
36 papers more in this group
See all 40 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.