TAILIEUCHUNG - Báo cáo lâm nghiệp: "Litterfall and mineral return in two cork-oak forests in northeast spain"

Tuyển tập các báo cáo nghiên cứu về lâm nghiệp được đăng trên tạp chí lâm nghiệp quốc tế, đề tài: "Litterfall and mineral return in two cork-oak forests in northeast spain. | Ann Sci For 1996 53 1049-1058 Elsevier INRA 1049 Original article Litterfall and mineral return in two cork-oak forests in northeast Spain ACaritat1 G Bertoni2 M Molinas1 M Oliva1 A Dominguez-Planella1 Cork-oak Laboratory University of Girona PI Hospital 6 17071 Girona Spain 2Laboratoire de physiologie végétale École nationale supérieure agronomique 145 av de Muret 31076 Toulouse France Received 20 June 1995 accepted 12 February 1996 Summary - Seasonal trends in litterfall and potential mineral return were studied in two cork-oak forest sites in the northeastern Iberian peninsula. The estimated average litter production was for one site and Lyear1 for the other these figures are similar to those reported for holm-oak Quercus Hex forests in the same area. Seasonal litterfall patterns were typical of Mediterranean forest ecosystems. Leaves accounted for 46 to 78 of the total dry matter. Their annual weighted-average mineral composition was low in macronutrients N 8-9 K 4-5 Mg Ca 9-10 and p 1 and relatively high in micronutrients such as Mn 1 or Fe 1 . Minimum N and p concentrations were found during the growth period. Estimates of potential mineral return for an annual cycle were N 38-52 p K 20-28 Ca 44-53 and Mg 1 depending on the site biomass and fertility. cork-oak litterfall nutrient cycling Mediterranean forest ecosystems Quercus Suber Resume - Variations saisonnières de la chute de la litière et de leur teneur en minéraux dans une foret de chêne-liège au nord-est de I Espagne. Les variations saisonnières de la chute de la litière et de leur teneur en minéraux ontété étudiées sur deux sites du nord-est de la péninsule ibérique. La production de litière est de 3 9 1 à Quart et de 4 6 à Sant Hilari valeurs similaires à celles qui ont déịà été publiées pour le chêne vert dans la meme region. Le type de variation observe est caractéristique des écosystèmes .

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