Abstract
Abstract ‘Grasslands Huia’ white clover plants were grown at a constant root and shoot temperature of 8°C in a controlled environment room. Nitrate or urea labelled with 15 N was applied to the foliage, foliage plus the roots, or to the roots only. After 21 days, plants supplied with foliar nitrogen (N) or with N to the foliage plus roots, produced significantly ( P < 0.05) more lamina dry weight than plants supplied with N to the roots only. Plants supplied with N to the foliage contained significantly ( P < 0.05) more lamina 15 N than plants supplied with N to the foliage plus the roots or to the roots only. From 14 days onwards, plants supplied with foliar N, or N to the foliage plus the roots, had significantly ( P < 0.05) higher leaf areas than plants supplied with N to the roots only, irrespective of the form of N applied. By 21 days, plants supplied with foliar nitrate or urea had significantly ( P < 0.05) higher photosynthesis, transpiration, stomatal conductance rates, and lamina sucrose concentrations, than plants supplied with N to the roots. The experiment demonstrated the importance of N availability as a rate‐limiting factor on starch and sucrose synthesis and, in turn, on foliage growth at low temperatures in white clover.
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Claims 6
Claim · model-written summary
Foliar N, or N to the foliage plus roots, gave more white clover lamina dry weight than N to the roots only.
- Taxon
- white clover
Trifolium repenst0 - Treatment
- foliar nitrogene3
- Outcome
- lamina dry weighte1
- Direction
- moree1
- Comparator
- N to the roots onlye1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“in white clover at low temperature”
e3“plants supplied with foliar nitrogen”
e1“more lamina dry weight than plants supplied with N to the roots only”
Claim · model-written summary
Foliar N, or N to the foliage plus roots, gave higher white clover leaf area than N to the roots only from 14 days onwards.
- Taxon
- white cloverTrifolium repenst0
- Treatment
- foliar Ne4
- Outcome
- leaf arease4
- Direction
- highere4
- Qualifier
- From 14 days onwardse5
- Comparator
- N to the roots onlye4
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“in white clover at low temperature”
e4“plants supplied with foliar N, or N to the foliage plus the roots, had significantly ( P < 0.05) higher leaf areas than plants supplied with N to the roots only”
e5“From 14 days onwards”
Claim · model-written summary
Foliage-supplied N gave white clover more lamina 15N than N to the foliage plus roots or to the roots only.
- Taxon
- white cloverTrifolium repenst0
- Treatment
- N to the foliagee6
- Outcome
- lamina 15 Ne6
- Direction
- moree6
- Comparator
- N to the foliage plus the roots or to the roots onlye6
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“in white clover at low temperature”
e6“Plants supplied with N to the foliage contained significantly ( P < 0.05) more lamina 15 N than plants supplied with N to the foliage plus the roots or to the roots only”
Claim · model-written summary
By 21 days, foliar nitrate or urea raised white clover photosynthesis, transpiration and stomatal conductance above N to the roots.
- Taxon
- white cloverTrifolium repenst0
- Treatment
- foliar nitrate or ureae7
- Outcome
- photosynthesis, transpiration, stomatal conductance ratese7
- Direction
- highere7
- Qualifier
- By 21 dayse7
- Comparator
- N to the rootse7
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“in white clover at low temperature”
e7“By 21 days, plants supplied with foliar nitrate or urea had significantly ( P < 0.05) higher photosynthesis, transpiration, stomatal conductance rates, and lamina sucrose concentrations, than plants supplied with N to the roots”
Claim · model-written summary
By 21 days, foliar nitrate or urea raised lamina sucrose concentrations above N to the roots in white clover.
- Taxon
- white cloverTrifolium repenst0
- Treatment
- foliar nitrate or ureae7
- Outcome
- lamina sucrose concentrationse7
- Direction
- highere7
- Qualifier
- By 21 dayse7
- Comparator
- N to the rootse7
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“in white clover at low temperature”
e7“By 21 days, plants supplied with foliar nitrate or urea had significantly ( P < 0.05) higher photosynthesis, transpiration, stomatal conductance rates, and lamina sucrose concentrations, than plants supplied with N to the roots”
Claim · model-written summary
N availability appears to be a rate-limiting factor for starch and sucrose synthesis and, in turn, for foliage growth of white clover at low temperature.
- Taxon
- white cloverTrifolium repense0
- Treatment
- N availabilitye0
- Outcome
- foliage growthe0
- Qualifier
- starch and sucrose synthesise0
- Setting
- at low temperaturese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The experiment demonstrated the importance of N availability as a rate‐limiting factor on starch and sucrose synthesis and, in turn, on foliage growth at low temperatures in white clover”
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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.