Z Katedry Uprawy Roli i Nawożenia Roślin Ogrodniczych
Akademii Rolniczej w Krakowie
Abstract. In the laboratory study the physico-chemical properties of the fertilizer preparations produced on the base of the synthetic potassium polyacrylate were evaluated. The polymer absorptiveness as related to the salt solutions decreased with increase of their concentration (1.4 - 4.8 EC) from 50-70%. According to the obtained results, releasing of the nutrient compounds ( N, P and Mg) from the fertilizer preparations into solutions is gradual, the monovalent cations are easier released than the divalent ones. Additionally was stated, that the potassium ions from the synthetic potassium polyacrylate dissociate in the water solution, increasing their EC.
Key words:
polyacrylamide polymers, water absorption, nutrient release, soluble salts
Summary
In the present study physico-chemical properties of fertilizer preparations, produced on the base of the synthetic polymer (polyacrylate) were evaluated. The investigated GSNU preparations were of the polymeric structure and contained the introduced into them nutrient compounds, while AQUA FLO preparations were the mixture of fertilizer polymer GNSU (50%), diatomit (20%), dolomit (20%) and the poultry manure (10%). The absorptiveness of Super Absorbent Plus polymer in relation to the salt solutions decreased with increase of their concentration (1.4 - 4.8 EC) from 50-70%. According to laboratory study, releasing of the nutrient compounds (N, P and Mg) from the fertilizer preparations into the water solution was gradual, and the monovalent cations were easier released from the polymer structure than divalent ones.