Journalartikel

Jahr der Veröffentlichung: 1982

Seiten: 27-32

Zeitschrift: Soil Science

Bandnummer: 133

Heftnummer: 1

ISSN: 0038-075X

eISSN: 1538-9243

DOI Link: https://doi.org/10.1097/00010694-198201000-00005

Verlag: Lippincott, Williams & Wilkins

Abstract: 
The relationship between the K+ buffer power and the critical K+ concentration of the soil solution was studied in pot experiments with Italian ryegrass. Critical K+ concentration is defined as that K+ concentration of the bulk soil solution below which plants respond by a yield increase when K fertilizer is applied. The K+ concentration of the soil solution was measured indirectly by means of the electro-ultrafiltration technique. The K+ buffer power was obtained by plotting the exchangeable K+ against the K+ concentration of the bulk soil solution. The steepness of the resulting curve reflects the K+ buffer power. Nine soils differing widely in clay content, CEC [cation exchange capacity] and K+ buffer power were used for the investigation. Close correlation (r2 = 0.908) was found between the K+ buffer power and the critical K+ concentration of the soil solution. This relationship was reflected by a hyperbola (y = c/x), indicating that the critical K+ concentration was lower the higher the K+ buffer power was.

Harvard-Zitierstil: MENGEL, K. and BUSCH, R. (1982) THE IMPORTANCE OF THE POTASSIUM BUFFER POWER ON THE CRITICAL POTASSIUM LEVEL IN SOILS, Soil Science, 133(1), pp. 27-32. https://doi.org/10.1097/00010694-198201000-00005

APA-Zitierstil: MENGEL, K., & BUSCH, R. (1982). THE IMPORTANCE OF THE POTASSIUM BUFFER POWER ON THE CRITICAL POTASSIUM LEVEL IN SOILS. Soil Science. 133(1), 27-32. https://doi.org/10.1097/00010694-198201000-00005