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The importance of soil acidity, moisture, exchangeable cation pools and organic matter solubility to the cationic composition of beech forest ( Fagus sylvatica L.) soil solution
Author(s) -
FalkengrenGrerup Ursula,
Tyler Germund
Publication year - 1993
Publication title -
zeitschrift für pflanzenernährung und bodenkunde
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.644
H-Index - 87
eISSN - 1522-2624
pISSN - 0044-3263
DOI - 10.1002/jpln.19931560414
Subject(s) - chemistry , beech , humus , fagus sylvatica , soil ph , environmental chemistry , water content , soil water , organic matter , soil organic matter , transect , composition (language) , soil science , botany , ecology , environmental science , geology , linguistics , philosophy , geotechnical engineering , organic chemistry , biology
Humus horizons of dystric cambisols were sampled six times during 1990–1992 at 66 points along a beech forest transect in Scania, s. Sweden. Cation concentrations of soil solutions obtained by centrifugation of sifted samples at field moisture were related to pH, DOC, exchangeable pools of the cations and soil moisture. Soil solution Al was speciated in free ionic (easily reacting) Al r and organically complexed Al org . Two or three variables accounted for a large share (70–90 %) of the cation variability between sampling points. Exchangeable soil pools were the most important variables for K, Mg. Ca, and Mn and contributed more when calculated on C. E. C. than on soil dry weight. Some function of pH was also of importance to most cation concentrations. Al r correlated well with both Al org (+) and pH(‐). Soil moisture was positively related to DOC and K, negatively to H‐ion concentration. pH measured by different methods were closely correlated (r = 0.93–0.97), pH kcl and pH BaCl 2being ca. 0.5 unit lower, pH H 2 Oca. 0.3 unit higher than soil solution pH, which varied between 3.5 and 5.6.