tailieunhanh - Báo cáo khoa học: "Regional scale effects of base cation fertilization on Norway spruce and European beech stands situated on acid brown soils: soil and foliar chemistry"

Tuyển tập các báo cáo nghiên cứu về lâm nghiệp được đăng trên tạp chí lâm nghiệp quốc tế đề tài: Regional scale effects of base cation fertilization on Norway spruce and European beech stands situated on acid brown soils: soil and foliar chemistry. | Ann. For. Sci. 58 2001 699-712 INRA EDP Sciences 2001 699 Original article Regional scale effects of base cation fertilization on Norway spruce and European beech stands situated on acid brown soils soil and foliar chemistry Laurent Misson Quentin Ponette and Frédéric André Université catholique de Louvain Unite des eaux et forêts Place Croix du Sud 2 bte 9 1348 Louvain-la-Neuve Belgium Received 12 February 2001 accepted 20 June 2001 Abstract - Ten experiments were installed on acid soils in different ecoclimatic conditions of the Belgian Ardenne. Soil pH exchangeable cations and P contents as well as foliar nutrient concentrations were monitored 1 and 3 years following the application of either 1 3 t ha-1 of a dolomitic limestone or 2 3 t ha-1 of a dolomitic limestone plus different amounts of P 0-800 kg natural phosphate and or K 0-250 kg K2SO4 . Dolomite rapidly increased Ca and Mg concentrations in the 0-10 cm soil layer and in the tree leaves. After three years exchangeable Al was significantly lower in the first soil layer but it still represented more than 50 of the exchangeable cations. Mean pH increase in the 0-10 cm layer was less than pH units. Dolomite alone tended to reduce mean K concentrations in the soils and or leaves of the beech stands. The addition of potassium sulphate to dolomite generally increased the soil and foliar K contents in the spruce stands contrary to the beech stands. It also tended to increase the resaturation of the exchange complex with Ca and Mg ions. The effects of natural phosphate addition were restricted to a slight increase of P foliar concentrations. The B foliar concentrations were reduced by both treatments whereas Zn concentrations increased significantly. The between stands variability of soil and foliage chemical properties was important but did not influence the effects of the treatments. base cation fertilization micronutrient Picea abies Fagus sylvatica Résumé - Effets à l echelle régionale de la fertilisation