Suo - Mires and peat vol. 59 no. 1-2 | 2008
Kivennäismaalisäyksen vaikutus turpeen ravinnemääriin ja männyn ravinnetalouteen metsäojitetuilla soilla.
English title: Long term effects of mineral soil addition on the nutrient amounts of peat and on the nutrient status of Scots pine on drained mires.
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Six field experiments on the use of mineral soil for amelioration of pine-dominated peatland forests were established in the 1920’s and 1930’s on drained mires in southern and central Finland. The treatments consisted of varying amounts of different textured mineral soil added on top of peatland. Soil samples were taken 52–74 years after the mineral soil application in 10 cm layers, up to 40 or 50 cm depth. The samples were analysed for pH, ash content, bulk density and nutrient concentrations. In two of the experiments, foliar samples of Scots pine were analyzed 66 and 77 years after the mineral soil application, and in one experiment, tree growth was measured for the period of 31–60 years after the application. The mineral soil had a long term effect on the physical and chemical properties of the top peat layer. Ash content and bulk density of the peat increased along with increasing application amounts, as did soil total P, K, Ca, Mg, Zn, Fe and B. The changes caused by the mineral soil were mostly restricted to the top 30 cm layer. The higher the soil fine fraction was, so was the increase in peat total P, K, Ca and Mg amounts. The addition of mineral soil increased tree growth and improved nutrient deficiencies (P, K) of Scots pine on one experiment, but decreased the B concentrations near the deficiency level.
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Hytönen,
Finnish Forest Research Institute, Kannus Research Unit, P.O. Box 44, FI-69101 Kannus, Finland
Sähköposti:
ei.tietoa@nn.oo
- Moilanen, Sähköposti: ei.tietoa@nn.oo
- Silfverberg, Sähköposti: ei.tietoa@nn.oo
Tiivistelmä.
English title: Bacterial Quality of River Nile Water at Cairo Region in Egypt.
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The aim of is study was to elucidate the bacterial quality of the River Nile water at Cairo region in Egypt. The microorganisms such as heterotrophic bacteria and faecal coliforms were examined. The bacterial isolates were identified using different keys of identification and Biolog metabolic fingerprint system. The results showed the presence of different genera of microorganisms, which were. Alcaligenes, Escherichia, Aeromonas, Pseudomonas, Klebsiella, Enterobacter, Rahnella, Xanthobacter, Streptomyces, Rhodococcus and Arthrobacter. The significance of the results was shortly discussed.
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Rifaat,
Microbial Chemistry Department, National Research Centre, Cairo, Egypt
Sähköposti:
ei.tietoa@nn.oo
Putkilokasvien esiintyminen soidensuojeluohjelmassa esitetyillä alueilla Etelä- ja Keski-Suomessa.
English title: Vascular plant species in planned mire conservation areas in southern and central Finland.
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The occurrence of the threatened and endangered vascular mire plant species was inventoried in the mire conservation areas in Finland. The survey was based on 246 sample plots (0.5 km × 0.5 km) randomly chosen in the Finnish mire conservation areas planned in 1981 in southern and central Finland. In the inventory, 243 vascular plant species and 2 hybrids were found in bog mires and 249 species and 10 hybrids were found in the southern aapa mires. The majority of the found mire plant species commonly occur on mires in Finland. In this survey, out of 18 threatened primary mire vascular plant species occurring in Finland, only three species (Carex heleonastes L. f., Dactylorhiza incarnata ssp. cruenta (O. F. Mull.) P. D. Sell, D. cruenta (O. F. Mull.) Verm, Orchis cruenta (O. F. Mull.) and Dactylorhiza traunsteineri) (Saut. ex Rchb.) Soo´, Orchis traunsteineri Saut. ex Rchb., Dactylorchis traunsteineri (Saut. ex Rchb.) Verm.; incl. Dactylorhiza curvifolia (F. Nyl.) Czerep.; incl. D russowii (Klinge) Holub and only one so called secondary mire plant species (Carex paniculata L.) were found in the sample plots. The found species occurred only on six mire conservation areas. Compared to the size of the material, the percentage of findings of threatened vascular plant species was remarkably low. It can be concluded that the complementary programs of the mire conservation in Finland have been important to protect the threatened vascular mire plants.
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Hanhela,
Oulu University of Applied Sciences, School of Renewable Natural Resources, Metsäkouluntie, FI-90650 Oulu
Sähköposti:
ei.tietoa@nn.oo
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