DIGITALNA ARHIVA ŠUMARSKOG LISTA
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ŠUMARSKI LIST 3-4/1961 str. 63 <-- 63 --> PDF |
pojava da se u krškim terenima biraju radije pašnjačke partije za pošumljavanje samo da se što sigurnije postigne planski zadatak i smanje njegovi troškovi. Pod ovim dojmom su i neka šumarska savjetovanja počela pitanje pošumljavanja krša stavljati u drugi plan i ako je nedvojbeno da je svaki komad pošumljenog krša toliko vrijedan da gotovo i nema cijene. Zelja nam je, da u prilog ovome navedemo i odno>s mjesnog stanovništva prema pošumljavanju željezničkih snjegozaštitnih pojaseva u području Zrmanje. I ako ovaj izrazito pašnjački kraj zna u nekim ljetnim mjesecima biti potpuno suh, ipak se nije dogodilo, da je bilo kad puštano blago u ovaj ograđeni prostor, koji je podignut još prije pet godina. Napominjemo, da se na drugim mjestima gdje ima više šume u okolici i mnogo boljih uvjeta za pašarenje ovo redovno događa. Cilj nam je da ovim jednostavnim primjerom i postupcima koji su u njemu prikazani stvorimo više i raspoloženja i povjerenja prema pošumljavanju teških krševitih terena, pa se nadamo da će ovaj prikaz u tom smislu biti od koristi. LITERATURA: Afanasije v D.: Pošumljavanje krša — Š. L. 1952. Bale n J.: Naš goli krš — Zagreb 1931. Horva t I.: Nauka o biljnim zajednicama — Zagreb 1949. N Horva t A.: Osvrt na rezultate pošumljavanja u krškom području NRH u periodu petogodišnjeg plana — Š. L. 1954. Zian i P.: Tehnika na krasu — Gozd. vestnik 1954. A CONTRIBUTION TO THE AFFOEESTATION OF CONTINENTAL KARST TERRAINS EXPOSED TO THE INFLUENCE OF EXTREME NE-WINDS (BORA) SUMMARY The source of the Zrmanja River is situated roughlv the border of the provinces of Lika and Dalmatia lying in a tvpical´ continental Karst region. In this area the climatic conditions of great extremes are prevalent. Besides the summer droughts, which last 2—3 months also a temperature of —36° C was noticed there. The NE-wind is here an almost daily phenomenon, reaching very often a speed of 100—130 km./h. The soils are degraded, shallovv and very porous, with a deeply leached mineral component of potassium and phosphorus. Throughout this region there passes the railway line Ogulin—Split, and here are also the cross-roads of the higvvays Gospić—Zadar—Split and Bihać—Zadar—Split. During the vvinter snow periods there occurs regularly an interruption in railway and road traffic because of heavy snow-drifts brought by the north winds. In order to protect the traffic against the snow-drifts the Railwa;y Administration undertook in this district to establish snow shelter belts by means of the following tree species: Pinus nigra, Fraxinus Ornus, Ostrya carpinifolia, Ulmus campestris, Tilia parvifolia, Acer obtusatum, Populus nigra v. pyramidalis, and Populus canadensis. The succes of this afforestation work performed in »nests« spaced 1 X 1 X 1,5 m was complete only with the Austrian Pine while the other species showed a tendency to stuntedness. In order to improve the conditions in this silvicultural undertaking, the following trial was carried out on an experimental plot: the plot was dug in the manner that ali grasses and weeds between the »nests« were removed, and thereafter manured with artificial fertilizers (superphosphate and KAS) in quantities of ca. 3 kg. per are. This trial showed such promising results that in spite - of the adverse climatic and soil conditions ali species on the plot started already in the year of planting their normal growth. |