DIGITALNA ARHIVA ŠUMARSKOG LISTA
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| ŠUMARSKI LIST 5-7/1981 str. 10 <-- 10 --> PDF |
iz istog razloga, kod osnivanja intenzivnih kultura ispod donje granice prirodnog rasprostranjenje obične smreke, posebnu pažnju zaslužuju proveniencije s nižih nadmorskih visina. One su u pravilu brže rasle i kod njih se mogu očekivati veći učinci primjenom mineralnih gnojiva. Ovu pojavu neophodno je provjeriti i konkretizirati osnivanjem terenskih pokusa na odgovarajućim staništima; dvogodišnje biljke obične smreke pokazivale su značnajno brži rast i sadržavale veće količine analiziranih hraniva od biljaka omorike i sitkanske smreke; primjenjena gnojidba značajno je utjecala na smanjenje šteta izazvanih golomrazicom, posebno kod biljaka omorike i sitkanske smreke koje su s obzirom na ovu pojavu osjetljive. LITERATURA Evers, F. N. (1978): Über bleibende Differenzierungen im Minerals toff gehalt der Nadeln bei verschiedenen Klonen der Fichte (Picea abies (L.) Karst.) Mitt. des Vereins f. Forstl. Standartskunde und Forstpflanzenzüchtung, 61—64. Fi elding , J. M., Brown , A. G. (1961): Tree-to-tree variations in the health and some effect od superfhosphate on the growth and development of Monterey pine on a slow-quality site. Commonweath of Australia, For. ad Timber Bur., Leaflet No. 79. 19 pp. Giertych , M. M. (1968): Variations in Norway Spruce provenances in their ability to utilize mineral nutrients available in limited quantities under competitive conditions. Forth Annual Rep., Polish Acad. Sei., Inst, of Dendrology and Kornik Arboretum, 38 pp. Ingelstad , T. (1963): Comparison of nutritional properties in forest tree species. For. Cen. and Tree Impr., Stockholm, Sec. 5/9, 5 pp. Komlenović , N. (1973): Koncentracija hraniva u iglicama kao indikator stanja ishrane kultura obične smreke (Picea abies, Karst.), Zagreb (doktorska disertacija) Kral , E. (1961): Untersuchungen über Nährstoff haushält von auf gleichem Standard erwachsenen Fichtenjungpflanzen in Abhängigkeit von ihrere Wuchsenergie und Herkunft. Cbl. Ges. Forstwes., 78, 18—38. Walker , L. C, Hatcher , R. D., (1965): Variation in the ability od slash pine progeny groups to absorb nutrients, Soil Sci. Soc. Amer. Proc. 29 (5), 616—621. Zobel , B., Roberds , J., (1970: Diferencial genetic response to fertilizers within tree species. Society of American Foresters, Michigan, August 5, 19 pp. The Relatoship Between the Nutritio and Growth of Some Norvway Spruce Provenances (Picea abies Karst.) Summary The effects of application of NPK fertilizers on 2-year-old seedlings of 10 proveniences of Norway spruce and one provenience each of Omorika spruce and Sitka spruce were investigated. The study was conducted in the Forest Research Institute nursery at Jastrebarsko, using an artificially constructed seedbed mixture with chemical characteristics as shown in Table 1. The treated plots intially received 15 g P2O5 as superphosphate and 15 g K20 as potassium sulphate per square meter of surface area. Ammonium nitrate was 216 |