Le diagnostic foliaire

Bonneau, M.

doi:10.4267/2042/25930

Cited by 56 publications

(30 citation statements)

References 1 publication

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“…The physiological activity of the tree crown makes it sensitive to environmental constraints (climate, soil fertility). As such leaves (or needles) are used for diagnosing tree nutritional status [7]. Another important factor affecting the nutrient amount = f(TAB) relation is the stand structure, which is dependent on both tree age and silviculture.…”

Section: Discussionmentioning

confidence: 99%

Relationships between forest tree species, stand production and stand nutrient amount

et al. 2000

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-Data from the literature concerning stand aerial biomass, stand nutrient amount (i.e. N, P, K, Ca and Mg) of four major forest tree species of the temperate area were compiled in order to propose simple general relationships to quantify nutrient depletion associated with biomass harvesting. The objectives was to identify the tree species effect on nutrient loss through biomass removal. Mean weighted nutrient concentrations of aerial biomass decreased rapidly until the maximum current annual increment of stands was reached ("adult stands"); the concentration then became more or less constant. For adult stands, linear relations existed between aerial biomass and their nutrient amount. Using total aerial biomass (TAB) or stem biomass including bark (SBB) as references against the corresponding nutrient amount showed: i) that correlation coefficients were higher in the latter case, ii) that nutrient amount per unit of biomass was lower for SBB than for TAB, and iii) that these relations were species-dependent. For a same SBB, species were ranked as follows: mean concentration of N and K, European beech > Douglas fir = Norway spruce = Scots pine; Ca, European beech = Norway spruce ≥ Scots pine ≥ Douglas fir; Mg, European beech ≥ Scots pine ≥ Norway spruce ≥ Douglas fir. For P, no significant difference was found for the tested species. The relationships between biomass and nutrient amount can be easily used by foresters to quantify the nutrient amount exported from a site during both thinning and harvesting operations, as well as the nutrients which remain in the logging residues left on the site and which will slowly yield available elements to the new plantation or the naturally regenerated stand. biomass / nutrient amount / nutrient content tables / sustainable management / forest tree speciesRésumé -Relations entre les essences forestières, la biomasse et la minéralomasse. Des données de la littérature concernant les biomasses aériennes et les contenus en N, P, K, Ca, Mg de quatre essences (sapin Douglas, épicéa commun, pin sylvestre, hêtre) ont été compilées. Les concentrations moyennes des parties aériennes en éléments majeurs diminuent avec l'âge jusqu'au stade adulte où elles se stabilisent. Pour les peuplements adultes, il existe des relations linéaires entre la biomasse aérienne et la teneur en éléments de celle-ci. Les coefficients de corrélation sont globalement plus élevés lorsque le seul tronc est considéré. Les tissus du tronc sont moins concentrés en éléments que ceux du houppier. Les relations linéaires entre les biomasses et les minéralomasses sont spécifiques à chacune des quatre essences. Pour une même biomasse de tronc, les essences se différentient selon les quantités d'éléments contenues dans ce compartiment. N et K : hêtre > sapin Douglas, épicéa commun, pin sylvestre. Ca : hêtre, épicéa commun ≥ pin sylvestre ≥ sapin Douglas, pin sylvestre. Mg : hêtre ≥ pin sylvestre ≥ épicéa commun ≥ sapin Douglas. Pour P, il n'existe pas de différence significative entre les espèces. Les relations...

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Section: Discussionmentioning

confidence: 99%

Relationships between forest tree species, stand production and stand nutrient amount

et al. 2000

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“…Leaf mineral contents of our seedlings were for all species and treatments well above the deficiency levels for oaks (Bonneau, 1986). Large interspecies differences were observed for N and Ca.…”

Section: Mineral Nutritionmentioning

confidence: 99%

“…In both the other species, the cessation of growth, which was not related to waterlogging, allowed a relative stability of nutrient contents. In fact, the mineral richness of the culture medium which resulted in mean leaf contents largely above deficiency levels and even above optimal levels (Bonneau, 1986) probably explained this stability.…”

Section: Mineral Nutritionmentioning

confidence: 99%

Sensitivity of seedlings from different oak species to waterlogging: effects on root growth and mineral nutrition

Colin-Belgrand¹,

Dreyer

Biron³

1991

Ann. For. Sci.

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Summary — The tolerance of oak seedlings from 3 species (Quercus robur, Q rubra, Q palustris) to a 7-wk period of waterlogging was tested under greenhouse conditions. The seedlings had completed their height growth when treatments were applied. A permanent water table was maintained at 6 cm below the soil surface. Shoot growth, root growth and mineral content of xylem sap (P, K, Ca, Mg) and leaf tissues (N, P, K, Ca, Mg, S, Mn) were monitored weekly. Waterlogging had strong consequences on root development; flooded roots decayed, while hypertrophied lenticels and subsequently adventitious roots appeared on the taproot. Although the mineral nutrient content in xylem sap displayed significant differences between species, no effect of waterlogging could be detected. But the combination of constant concentration and reduced transpiration in waterlogged seedlings probably resulted in a reduced nutrient flux to the leaves. Leaf nutrient contents decreased markedly, in particular for total N, and to a lesser extent for S and K; but in all cases they remained well above deficiency levels. No phytotoxic accumulation of Mn could be detected. Important interspecific differences appeared. The development of root adaptations was much greater for Q robur than for both Q palustris and Q rubra, probably indicating a higher tolerance to flooding in the former species. Surprisingly, N and S concentrations decreased more in Q roburthan in both other species, but this could be due to the fact that only Q robur continued leaf growth, leading to a dilution of N in leaf tissues.

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“…The Ca-deficiency resulted in a significant decrease of the initial carboxylation activity (P < 0.05), while the total activity of the enzyme was not affected (fig 7). The (Bonneau, 1988 (Schwartz, 1985) and ABA (De Silva et al, 1985;Mc Ainsh et al, 1990) induce stomatal closure mainly via an increase of cytosolic-free Ca 2+ in the guard cells, which in turn inhibits proton efflux (Inoue and Katoh, 1987) and K + uptake (Blatt et al, 1990), and activates anion efflux (Schroeder and Hagiwara, 1989 (Tallman and Zeiger, 1988;Poffenroth et al, 1992;Talbott and Zeiger, 1993). The deficiency induced a decrease in net CO 2 assimilation (A) at leaf level to onehalf of the controls.…”

Section: Introductionmentioning

confidence: 99%

Effects of a calcium deficiency on stomatal conductance and photosynthetic activity of Quercus robur seedlings grown on nutrient solution

et al. 1996

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Le diagnostic foliaire

Cited by 56 publications

References 1 publication

Relationships between forest tree species, stand production and stand nutrient amount

Relationships between forest tree species, stand production and stand nutrient amount

Sensitivity of seedlings from different oak species to waterlogging: effects on root growth and mineral nutrition

Effects of a calcium deficiency on stomatal conductance and photosynthetic activity of Quercus robur seedlings grown on nutrient solution

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