TAILIEUCHUNG - Báo cáo lâm nghiệp: "ree nutrition of Norway spruce as modified by liming and experimental acidification at the Höglwald site, Germany, from 1982 to 2004"

Tuyển tập các báo cáo nghiên cứu về lâm nghiệp được đăng trên tạp chí lâm nghiệp Original article đề tài: Tree nutrition of Norway spruce as modified by liming and experimental acidification at the Höglwald site, Germany, from 1982 to 2004. | Ann. For. Sci. 63 2006 861-869 INRA EDP Sciences 2006 DOI forest 2006069 861 Original article Tree nutrition of Norway spruce as modified by liming and experimental acidification at the Hoglwald site Germany from 1982 to 2004 Christian HUBER Wendelin WEIS Axel Gottlein Fachgebiet fur Waldernahrung und Wasserhaushalt Department fur Okologie WZW TU Munchen Am Hochanger 13 85354 Freising Germany Received 31 October 2005 accepted 23 March 2006 Abstract - From 1982 to 2004 the elemental concentrations of current current 1 and current 2 year old needles of a mature spruce stand were investigated at the N-saturated acidified but healthy Hoglwald site. The control was compared with aliming experimental acid irrigation acid irrigation liming normal irrigation and normal irrigation liming treatment. Liming was performed in 1984 and irrigation from 1984-1990. High year to year variations were found for most of the elements in all treatments especially for K deficient to high . Despite the N saturation of the ecosystem needles showed no N-overfeeding of the trees. N Mg K Fe concentrations showed no clear treatment effects. Twenty years after liming a lowered P availability is indicated which was more pronounced in older needles. Ca concentrations increased after liming while Al decreased. The elemental concentrations of the acid irrigated treatment did not differ significantly from the normal irrigated or control treatment. liming long term study soil acidification spruce tree nutrition Résumé - Modifications de la nutrition forestiere par acidification expérimentale et chaulage dans le site du Hoglwald Allemagne entre 1982 et 2004. Les concentrations en elements minéraux des aiguilles de l année et celles âgées d un an et de deux ans ont été mesurées entre 1982 et 2004 dans un peuplement d épicéa adulte saturé en azote et acidifié mais sain du site de Hoglwald. Ce témoin a été comparé avec les traitements suivants chaulage irrigation acide expérimentale irrigation .

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