DIGITALNA ARHIVA ŠUMARSKOG LISTA
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| ŠUMARSKI LIST 13/2005 str. 133 <-- 133 --> PDF |
S. Pcrić, V. Topic. 2. Orcšković, R. Maradin: BIOLOGICAL CONTROL OF EXCAVATIONS AND DUMPS ... Šumarski list - SUPLEMF.NT (2005). 120-132 Besides careful soil preparation, quality seedling material and expert knowledge, successful afforestation requires proper tending of young cultures. In the first place, watering should be carried out regularly during critical times of the year, i.e. mainly in June, July and August. However, April and May might be also cri- RESULTS AND Pedological In the process of ameliorating the dumpsites, the basic precondition is to apply sufficient quantities of topsoil, which will later cover the formed marly plateaus and the whole area after the exploitation. In August of 2005 soil samples were taken from Rovanjska and Posedarje dumps. The samples were analysed (Table 3) by standard laboratory methods (AOAC 1996, PCC 1998). The analysis of the soil samples revealed very strong alkaline reactions with many total and active carbona tical months in certain years. Watering should be carried out whenever the skilled supervising person decides. In addition to watering, other tending measures should be carried out as well for the duration of at least two years. DISCUSSION analysis tes. The soils contain low proportions of humus and nitrogen (<0.06 %N), and are also poorly or avcragely supplied with phosphorus and potassium. (P205, K2). It is therefore recommended that 50 % of quality soil is added while planting the seedlings into holes; close to the root ball, about two litres of compost should be added to each seedling as a moisturising agent (Stocksorb, or similar). In the second vegetation after the planting, fertilising with complex nutrients should be carried out according to the assessed needs. Plant species suitable for afforestation The earth dumps of Rovanjska and Posedarje are located in the sub-Mediterranean vegetation zone of pubescent oak and white hornbeam (Querco-Carpinetum orientalis). The original climato-genetic vegetation of this area has considerable changed, so that great areas are in different degraded stages. The main tree species are juniper, stone lime-tree, black ash, white hornbeam, Montpelier maple, Christ´s thorn, Aleppo pine, and cypress. All these species surround the present dump areas, but were once growing on them. They could, therefore, be the right species to be planted on the research areas, after the ameliorating operations have been completed. The proportions of the individual species should be considered. A mixed stand of conifers and broadleavcs should be selected for higher resistance, quality and stability, in the following proportions: Aleppo pine (50 %); pubescent oak, black ash, and white hornbeam (30 %), and other mentioned species (20 %). The choice is reduced to the following fast-growing and decorative species with very modest requirements from the habitat: Tree species: 1. Quercuspubescens L., pubescent oak 2. Carpinus orientalis Mill., white hornbeam 3. Fraxnus ornus L., black ash 4. Prunus mahaleb L., perfumed cherry 5. Acer monspessulanum L., Montpelier ash 6. Pinus halepensis Mill., Aleppo pine 7. Cupressus sempervirens L., common cypress 8. Cupressus arizonica Greene., Arizona cypress Brushwood: 1. Juniperus oxycedrus L., juniper 2. Teucrium fruticans L., shrubby germander 3. Cotonaster horizontalis Decne., cotoneaster 4. Pistacia terebinthus L., terebinth 5. Phillyrea latifolia L., crack phyllirea 6. Phillyrea media L., stone lime-tree 7. Spartium junceum L., Spanish broom 8. Berberis vulgaris L., barberry 9. Lycium europaeum L., European box-thorn Climbers: 1. Hedera helix L., ivy 2. Tecoma radicans Juss. (Bignonia radicans U Campsis radicans Seem.), trumpet honeysuckle 3. Polygonum baldschuanicum Reg., Russian vine 4. Parthenocissus quinquefolia Planch., Virginia creeper Planting of trees and brushwood on the Rovanjska earth dump plateaus Below the junction of the D8 and 8 routes of the The Rovanjska dump (Photo 3) containing waste builMaslenica intersection, there is a neglected waste ding material and a layer of rocks should be partly modump, and earth disposal site under the CP Maslenica. ved into a landfill, levelled, and topsoiled. |