tailieunhanh - Báo cáo lâm nghiệp: " Selected physical properties of initial soils on the outside spoil bank of the Bełchatów brown coal mine"

Tuyển tập những bài báo cáo nghiên cứu khoa học hay nhất được đăng trên tạp chí JOURNAL OF FOREST SCIENCE đề tài: Selected physical properties of initial soils on the outside spoil bank of the Bełchatów brown coal mine. | JOURNAL OF FOREST SCIENCE 53 2007 7 308-313 Selected physical properties of initial soils on the outside spoil bank of the Belchatow brown coal mine M. Pajạk W. Krzaklewski Department of Forest Ecology Faculty of Forestry Agricultural University of Cracow Cracow Poland ABSTRACT The purpose of the study was to assess in respect of selected physical properties the reclamation of the northern slope of the outside spoil bank of the Beichatow brown coal mine by reforestation carried out 20 years ago. Investigations were carried out on 55 permanent research plots. This study confirmed the efficiency of reclamation of strip-mine spoils and its results allowed to point out the properties of initial soils as the most useful characteristics for the assessment of land reclamation by reforestation. Keywords forest reclamation spoil bank initial soils At the present time the reclamation of lands without soil including spoil banks of brown coal strip mines is generally confined to reforestation. In the case of spoil banks the physicochemical properties of the overburden rocks from which their covering is formed as well as the proper reclamation procedure have a decisive influence on the processes of formation of initial soils and therefore on the quality of forest sites coming into being Skawina 1958 . The purpose of the study presented in this paper was to estimate selected physical properties of initial soils forming on the outside spoil bank of the Beichatow brown coal mine. MATERIAL AND METHODS The field investigations were conducted on 55 permanent research plots located on the northern slope of the outside spoil bank of the Beichatow brown coal mine in about 20-years-old plantations established during 1978-1981. The investigated spoil bank is built of Quaternary and Tertiary sands 65 Quaternary loams and mudstones 20 and Tertiary clays 15 . During 1977-1982 after the formation of the northern fragment of the slope biological treatments of reclamation were carried out. They