Exposure of the alga Kirchneriella lunaris, isolated from desert soil, to a nutrient solution without phosphorus resulted in distinct growth and protein inhibition in relation to control cultures. In addition, P-deficient algae accumulated much smaller amounts of nitrate accompanied with a rise in free amino acids than the control cultures. The cell multiplications, dry matter, total pigments, proteins, and assay of nitrate reductase of Kirchneriella cultures were generally increased, with a rise in the corresponding P-levels of up to 1250 µg dm-3. Above that the parameters again decreased.
In the field experiment with yellow-pod French bean, Złota Saxa cultivar, the influence of two doses of dolomite fertilization (0 kg·m⁻² - control; 0,1 kg·m⁻² and 0,5 kg·m⁻²) on assimilation and transpiration processes, chlorophyll a+b content and the dry matter yield were examined. The relationships between parameters of gaseous exchange processes were determined for particular fertilizing combinations. Significant effect of both dolomite doses on the assimilation and transpiration intensity, chlorophyll a + b content and the yield of dry matter was stated. No influence on the transpiration process was observed. The regression analysis showed significant and typical correlations between examined parameters only in control and 0.1 kg·m⁻² dolomite dose combinations.
In the biosphere, life develops abundantly on the interfaces between macrospheres: surfaces of land, coastal zones and upper layers of waters. The author is interested in land surfaces covered by soil, vegetation and animal life associated with them — which are biologically active surfaces.