Laboratory studies of effects of lime on soluble Al, Ca, Mg and Mn in a pelostagnogley soil

Abstract

The cation composition of solutions and leachates from small-diameter laboratory soil columns was examined over a 23-week period after the addition of lime (0,3 and 6 t ha-') and/or nitrogen fertilizer (0 or 200 kg N ha-') to an acid soil (pH 4.2). Water was applied at regular intervals to the surface of the columns and 17 leachate samples collected. Initially, the pH of the leachate was high (6.6) in all treatments (including those without lime) but fell rapidly to approach a steady value of 3.8. Large losses of calcium occurred from all columns; the total equivalent amounts of lime lost ranged from 0.88 (no addition) to 2.38 (with added lime) t CaCO, ha-'. High concentrations of aluminium (181-325 p~)were present in leachates from all treatments; the addition of 200 kg N ha-' increased the leaching of Al by 94%; addition oflime also increased the amounts ofAl leached (by 52%).The pH of the soil solution (separated by centrifugation) was influenced by treatment, especially in the top 0-40 mm of the column. Aluminium concentration was related to pH, but the form of the relationship differed amongst the treatments.

Short-term Aluminum Stress Differentially Affects the Photochemical Efficiency of Photosystem II in Highbush Blueberry Genotypes

“…Most studies regarding Al stress are focused on phenomena occurring in the roots because the effects of Al manifest themselves in the plant root system first (Barceló and Poschenrieder, 2002;Delhaize and Ryan, 1995). Many reports indicate that acidification generates an increase in Al concentration as Al 3+ in the soil solution (Jarvis, 1987). This results in root growth reduction (Mora et al, 2004(Mora et al, , 2005Tamás et al, 2006) and sensitivity to Al toxicity (Kochian, 1995), reducing crop yields (Bolan et al, 2003;Kochian, 1995;Matsumoto, 2000).…”

Soil aluminium availability in Andisols of southern Chile and its effect on forage production and animal metabolism

“…Acidification generates an increase in aluminium (Al) and manganese (Mn) concentrations in soil solution (Jarvis, 1987), both of which result in a reduction of root growth (Mora et al. , 1999b, 2004) and eventually overall plant toxicity.…”

“…Acidification generates an increase in aluminium (Al) and manganese (Mn) concentrations in soil solution (Jarvis, 1987), both of which result in a reduction of root growth (Mora et al, 1999b(Mora et al, , 2004 and eventually overall plant toxicity. This reduces yield in crops and grasslands (Mora et al, 1999a;Bolan et al, 2003) and can also affect the quality of the pasture (Mora et al, 2004).…”