Abstract
The effect of nitrogen (N) nutrition on grapevine carbon (C) dynamics has been well studied at the annual scale, but poorly addressed at a pluriannual timescale. The aim of this study was to quantify, in an integrated conceptual framework, the effect of N nutrition on potted grapevine growth and storage over 2 consecutive years. The consequences of using destructive measurements were investigated using a hierarchical Bayesian model. The rate and duration of leaf growth were both positively impacted by the chlorophyll content of the leaves, but they were negatively impacted by the initial carbohydrate measurements, raising a distortion in the estimation of initial reserves. The C production per unit of global radiation depended on the leaf area dynamics. The allocation of dry matter mainly relied on the phenological stage. The present study highlights the importance of using appropriate statistical methods to overcome uncertainties due to destructive measurements. The genericity of the statistical approach presented may encourage its implementation in other agronomy studies. Based on our results, a simple conceptual framework of grapevine pluriannual growth under various N supplies was built. This provides a relevant basis for a future model of C and N balance and responses to N fertilization in grapevine.
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Claims 6
Claim · model-written summary
Leaf chlorophyll content positively related to leaf growth rate and duration.
- Compound
- chlorophyll contente0
- Outcome
- rate and duration of leaf growthe0
- Direction
- positively impactede0
Not reportedTaxon
Verbatim
e0“The rate and duration of leaf growth were both positively impacted by the chlorophyll content of the leaves”
t0“grapevine”
Claim · model-written summary
Initial carbohydrate measurements negatively related to leaf growth rate and duration.
VitisNot reportedOutcome
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“they were negatively impacted by the initial carbohydrate measurements”
t0“grapevine”
Claim · model-written summary
Carbon production per global radiation unit depended on leaf area dynamics.
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The C production per unit of global radiation depended on the leaf area dynamics”
t0“grapevine”
Claim · model-written summary
Dry matter allocation mainly depended on phenological stage.
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The allocation of dry matter mainly relied on the phenological stage”
t0“grapevine”
Claim · model-written summary
The Bayesian statistical approach addressed uncertainty from destructive measurements.
Verbatim
e0“The present study highlights the importance of using appropriate statistical methods to overcome uncertainties due to destructive measurements”
Claim · model-written summary
A conceptual framework of grapevine growth across nitrogen supplies was built.
Verbatim
e0“a simple conceptual framework of grapevine pluriannual growth under various N supplies was built”