tailieunhanh - Báo cáo lâm nghiệp: "Soil environment and nutrient status of Norway spruce (Picea abies [L.] Karst.) underplantings in conditions of the 8th FAZ in the Hrubý Jeseník Mts"

Tuyển tập các báo cáo nghiên cứu về sinh học được đăng trên tạp chí lâm nghiệp đề tài: Soil environment and nutrient status of Norway spruce (Picea abies [L.] Karst.) underplantings in conditions of the 8th FAZ in the Hrubý Jeseník Mts. | JOURNAL OF FOREST SCIENCE 57 2011 4 141-152 Soil environment and nutrient status of Norway spruce Picea abies L. Karst. underplantings in conditions of the 8th FAZ in the Hrubý Jesenik Mts. J. Pechácek1 D. Vavricek1 P. Samec2 faculty of Forestry and Wood Technology Mendel University in Brno Brno Czech Republic 2Branch Frýdek-Místek Institute for Forest Management in Brandýs nad Labem Frýdek-Místek Czech Republic ABSTRACT The main objective of this study was to investigate the causes of nutrient deficiency symptoms in Norway spruce Picea abies L. Karst. underplantings in the Hrubý Jesenik Mts. In the area concerned 19 research plots were established representing the ridge sites of the 8th FAZ of acid edaphic categories. On these plots samples were taken from topmost soil horizons and needle samples were collected in two series - from healthy and from damaged trees. The results of this study demonstrate that the nutrient deficiency symptoms and reduced vitality of evaluated underplantings were caused by the insufficient uptake of main nutrients Mg P K Nt . High contents of toxic elements Al S in damaged needles are another factor that negatively influences the health status of these underplantings. A statistical survey showed that damage to underplantings increased with decreasing proportions of main nutrients Nt Mg Ca K in organomineral horizons. At the same time the content of basic nutrients Nt Mg Ca K was found to increase in this horizon with an increasing proportion of oxidizable organic carbon C . The proportion of humus substances and the content of basic nutrients Nt Mg Ca K in organomineral horizons become a limiting factor for the normal growth and development of Norway spruce plantings in the ridge part of the Hrubý Jesenik Mts. Keywords Norway spruce nutrient deficiency symptoms stand nutrition soil environment The soil component creates an essential environment for ensuring the basic physiological processes of plants and is an irreplaceable part of the