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Accumulation and retranslocation of nitrogen and phosphorus in the foliage of Pinus sylvestris L. and Betula pubescens in chosen woodland ecosystems of the Slovinski National Park

100%

Parzych A., Trojanowski J., Sobisz Z.

Baltic Coastal Zone. Journal of Ecology and Protection of the Coastline

2010

tom 14

The study of foliage was carried out in two different forest ecosystems: Vaccinio uliginosi- Betuletum pubescentis and Empetro nigri-Pinetum in the Slovinski National Park in the period of 2002-2005. The largest volume of nitrogen and phosphorus in the litter of coniferous needles was found in early summer at the moment of maximum growth. An average concentration of nitrogen in examined needles was between 1.296% and 1.358% N in Vaccinio uliginosi-Betuletum pubescentis and from 1.010% to 1.118% N in Empetro nigri-Pinetum. The decrease of biogenes concentration in plant tissues was observed in the autumn months as a result of lower demand and recession of biogenes connected with storage of valuable elements in the fatter parts of the trees. In the fall season, a gradual recession of nutrients from the litter of coniferous needles was observed. In Vaccinio uliginosi-Betuletum pubescentis insignificant quantity of nitrogen recesses (average 5.6%) from the new and one year old litter of coniferous needles, including 47.2% N-NH4 and 78.6% N-NO3 and about 21.8% P, including 11.7% P-PO4. In Empetro nigri-Pinetum more intensive recession of biogenes was found from the litter of coniferous needles of common pine than in Vaccinio uliginosi-Betuletum pubescentis. On average 11.5% T-N is translocated, including 41.4% N-NH4 and 23.8% N-NO3 as well as 22.3% P, including 11.8% P-PO4.

Redistribution of stem carbohydrate in a drought resistant and susceptible wheat cultivars under water stress conditions

100%

Khan A. H., Ashraf M. Y., Naqvi S. S. M., Siddiquie K. A.

Acta Physiologiae Plantarum

1994

tom 16

nr 3

Ograniczanie wyników

1 Acta Physiologiae Plantarum

1 Baltic Coastal Zone. Journal of Ecology and Protection of the Coastline

1 Ashraf M. Y.

1 Khan A. H.

1 Naqvi S. S. M.

1 Parzych A.

1 Siddiquie K. A.

1 Sobisz Z.

1 Trojanowski J.

1 2010

1 1994

Wyniki wyszukiwania

Accumulation and retranslocation of nitrogen and phosphorus in the foliage of Pinus sylvestris L. and Betula pubescens in chosen woodland ecosystems of the Slovinski National Park

Redistribution of stem carbohydrate in a drought resistant and susceptible wheat cultivars under water stress conditions