engleski

Influence of phosphorus nutrition on leaf dry matter content and leaf mass per area of common beech and sessile oak saplings

This research was conducted on a five-year-old common beech and sessile oak saplings originating from two mature mixed common beech and sessile oak stands (provenance) from the Republic of Croatia (HR). Provenances differ in annual amount of precipitation, which in provenance Slavonski Brod (SB) from the eastern part of the HR is about 770 mm (dry provenance), and in Karlovac (KA) from the north-western part of the HR is about 1112 mm (wet provenance). During year 2021, after the establishment of the experimental trail, the transplanted saplings grew into two soil types, one was characterized by high (0.30 g P2O5/L soil = +P tretment) and the other by low (0.16 g P2O5/l soil = -P treatment) phosphorus (P) concentration. In September 2021, the saplings of both species in the +P treatment had a higher concentration of P in the leaves than the sampligs from the -P treatment. The aim of this study was to examine the effect of different soil P concentration and/or phosphorus nutrition on the leaf dry matter content (LDMC = dry leaf mass/fresh leaf mass) and leaf mass per area (LMA = dry leaf mass/leaf area) of common beech and sessile oak saplings originated from dry and wet provenances. Results of factorial ANOVA with main effects of treatment (+P vs -P), provenences (dry BS vs. wet KA) and species (common beech vs. sessile oak) indicate that LDMC and LMA in +P treatment were significantly higher than in -P treatment, dry SB and wet KA provenance had similar LDMC and LMA, whilest the common beech had significantly lower LDMC and LMA than the sessile oak. Significant interaction between main effects ”treatment x species” indicate thad LDMC and SLA of sessile oak were similar in both +P and -P treatments, whilest LDMC and SLA of common beech in -P treatment were significantly lower than in +P treatment.

Fagus sylvatica L., Quercus petraea (Matt.) Liebl., saplings, LDMC, LMA

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