Abstract
Abstract Nitrogen levels in xylem sap of apple trees rose following application of fertiliser nitrogen to the soil either in spring or summer but relative proportions of the main nitrogenous compounds in sap did not change. The total nitrogen in leaves also rose soon after nitrogen was applied to the soil. By the end of the season trees fertilised in either spring or summer had attained the same leaf nitrogen level. Application of nitrogen at either time produced higher levels of nitrogen (presumably as mobilisable reserves) in dormant shoots in the following winter.
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Claims 5
Claim · model-written summary
Spring or summer fertilizer increased xylem sap nitrogen.
- Taxon
- apple trees
Malus domesticae0 - Treatment
- application of fertiliser nitrogen to the soil either in spring or summere0
- Outcome
- Nitrogen levels in xylem sape0
- Direction
- rosee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Nitrogen levels in xylem sap of apple trees rose following application of fertiliser nitrogen to the soil either in spring or summer”
Claim · model-written summary
Fertilization did not change the proportions of main sap nitrogen compounds.
- Taxon
- apple treesMalus domesticae1
- Treatment
- application of fertiliser nitrogene1
- Outcome
- relative proportions of the main nitrogenous compounds in sape0
- Direction
- did not changee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“relative proportions of the main nitrogenous compounds in sap did not change”
e1“apple trees rose following application of fertiliser nitrogen”
Claim · model-written summary
Leaf total nitrogen rose soon after soil nitrogen application.
- Taxon
- apple treesMalus domesticae1
- Treatment
- nitrogen was applied to the soile0
- Outcome
- total nitrogen in leavese0
- Direction
- rosee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“total nitrogen in leaves also rose soon after nitrogen was applied to the soil”
e1“apple trees”
Claim · model-written summary
Spring and summer fertilization reached the same leaf nitrogen level by season end.
- Taxon
- apple treesMalus domesticae1
- Outcome
- leaf nitrogen levele0
- Direction
- samee0
- Comparator
- spring or summere0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“By the end of the season trees fertilised in either spring or summer had attained the same leaf nitrogen level”
e1“apple trees”
Claim · model-written summary
Either application time produced higher nitrogen in dormant shoots the following winter.
- Taxon
- apple treesMalus domesticae1
- Organ / stage
- dormant shootse0
- Treatment
- Application of nitrogen at either timee0
- Outcome
- levels of nitrogene0
- Direction
- highere0
- Qualifier
- following wintere0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Application of nitrogen at either time produced higher levels of nitrogen (presumably as mobilisable reserves) in dormant shoots in the following winter”
e1“apple trees”
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