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Photosynthetic rates and water use efficiencies in three climber species grown in different exposures at urban and suburban sites

100%

Borowski J., Loboda T., Pietkiewicz S.

Dendrobiology

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2009

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tom 62

55-61

Water Use Efficiency and photosynthetic rate of Fallopia aubertii (L. Henry) Holub., Hedera helix L. and Vitis riparia Michx. grown in various exposures in two site variants: Warsaw city centre vs. suburbs wereanalysed. All studied climbers showed similar photosynthetic intensity in both sites. The strongest effect of the exposition was found for F. aubertii, followed by V. riparia, and shade tolerant H. helix. WUE of studied climbers was relatively low, higher in suburbs than in the centre, due to lower adaptation to different sites. TheWUE of the climbers depended on exposure and the highest scores were obtained for sunny southern and western walls, while the lowest in northern ones. Intrinsic water use efficiency of the studied climbers was higher in the city centre than in the suburbs.

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Contents of chlorophyll and selected mineral components and the yield of common thyme [Thymus vulgaris L.] at differentiated nitrogen fertilization

80%

Golcz A., Politycka B.

Herba Polonica

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2009

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tom 55

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nr 3

69-75

The vegetation experiment was carried out in pots, in an unheated greenhouse of Experimental Station ‘Marcelin’, Poznań University of Life Sciences. The studies were carried out on the effect of nitrogen nutrition on the herb fresh matter and on its dry crumbled matter as well as on the contents of chlorophyll a and b, nitrogen, magnesium and iron in leaves of common thyme of ‘Słoneczko’ cultivar. Nitrogen was applied in the form of NH4 NO3 before vegetation (control – without nitrogen addition, 60, 120, 180 and 240 mg N dm-3 substrate) and as a top dressing with an addition of 60 mg N dm-3 in all variants with nitrogen fertilization. Herb harvest was carried out twice. It was found that nitrogen, irrespective of its dose, significantly decreased the level of chlorophyll a and b (on the average by 60%) and the iron content (on the average by 40%). The decreased chlorophyll level in thyme leaves with nitrogen application was positively correlated with iron content. No dependence was found between the level of chlorophyll and the nitrogen content in the herb. Nitrogen fertilization significantly increased both the yield of herb fresh matter and of the dry raw material. In case of dry raw material, no differences were found in the yield depending on the differentiated nitrogen nutrition

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Short-term changes in the hydrochemical constituents in the water column of the Gdansk Deep [Baltic Sea] in spring. Part 2. Modelling of diel changes in nutrient concentrations in the euphotic layer

80%

Falkowska L.

Oceanologia

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1998

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tom 40

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nr 2

Ograniczanie wyników

1 Dendrobiology

1 Herba Polonica

1 Oceanologia

1 Borowski J.

1 Falkowska L.

1 Golcz A.

1 Loboda T.

1 Pietkiewicz S.

1 Politycka B.

2 2009

1 1998

Photosynthetic rates and water use efficiencies in three climber species grown in different exposures at urban and suburban sites

Contents of chlorophyll and selected mineral components and the yield of common thyme [Thymus vulgaris L.] at differentiated nitrogen fertilization

Short-term changes in the hydrochemical constituents in the water column of the Gdansk Deep [Baltic Sea] in spring. Part 2. Modelling of diel changes in nutrient concentrations in the euphotic layer