Wyniki wyszukiwania

1

Artykuł dostępny w postaci pełnego tekstu - kliknij by otworzyć plik

Relative air humidity and saturation deficit in Leba

100%

Baranowski D.

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

|

2010

|

tom 14

The main aim of the paper was to determine the most important features of air humidity in Łeba in the years 1976-2005. The average daily values of relative air humidity (RH) and saturation deficit (SD) from the meteorological station in Łeba were used as basic data for the survey. After initial estimation of dispersion parameters and asymmetry of distribution, these values were calculated for annual and multi-annual periods. The survey findings showed that in Łeba the humidity of air in the analysed period was relatively high (with mean annual RH and SD values – 82.8% and 2.1 hPa respectively). The highest mean air humidity is normally reported in winter months (with maximum in December), while relatively low humidity values are recorded in the warm half-year (Apr.-Sep.). The provided analysis of long-term variability in monthly and annual averages has shown a decreasing trend of air humidity in the region of Łeba. Such conclusion is proved by statistically significant tendencies: growing of moisture deficit and dropping of relative air humidity. The greatest fall in air humidity within the 30-yr period was found in April; while rise was noted only in May. The greatest diversification of mean monthly air humidity values are typical for the period between April and July; the most stable higric conditions are usually recorded in December.

2

Nitrogen content and its uptake by maize as influenced by some meteorological elements and fertilization

72%

Alexandrova P., Donov D.

International Agrophysics

|

2003

|

tom 17

|

nr 2

3

Wplyw egzogennej spermidyny na rosliny ogorka [Cucumis sativus L.] rosnace w warunkach stresu suszy

44%

Blamowski Z. K., Borowski E., Paczos K.

Acta Agrobotanica

|

2001

|

tom 54

|

nr 1

5-16

The effect or exogenous spermidine (0; 1 and 2 mmol dm•') on cucumber plant subjected to seven day drought (30% f.w.c.) were studied. Growth rate of plants, gas exchange. chlorophyll fluorescence. water saturation deficit in tissue (WSD), leakage electrolytes (EL) as well as the content of free proline were determined. The results showed that drought inhibited growth and gas exchange. decreased the potential efficiency of PSII (Fv/Fm) but increased the value of WSD, EL and the level of free proline in tissue. The spermidine treatment of plants immediately before drought influenced the decrease concentration of free proline. water dericit and leakage of electrolytes but the increase of stomatal conductance (g.). intensity of photosynthesis (Pn) and transpiration (E). Greater change on the course of primary photosynthetic reactions in PSU (Fv/Fm., ΦPSII, qP, qN) were not detected. The autors concluded. that in drought conditions exogenous spermidine together with proline induced by stress. contribute lo increase of water content in tissue and maintenance of the enzymatic activity of cells as well as they guarantee the integrity of cell membranes. Profitable effect of spermidine on the condition of cucumber in drought period shorted the time necessary for plants to come back to level of control treatment.

Ograniczanie wyników

1 Acta Agrobotanica

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

1 International Agrophysics

1 Alexandrova P.

1 Baranowski D.

1 Blamowski Z. K.

1 Borowski E.

1 Donov D.

1 Paczos K.

1 2010

1 2003

1 2001

Relative air humidity and saturation deficit in Leba

Nitrogen content and its uptake by maize as influenced by some meteorological elements and fertilization

Wplyw egzogennej spermidyny na rosliny ogorka [Cucumis sativus L.] rosnace w warunkach stresu suszy