Effects of lime-induced differences in site fertility on fine roots of oak

Abstract

-This study aims at evaluating the effects of lime-induced differences in site fertility on fine roots. Lime was applied to ten oak (Quercus petraea and Q. robur) stands on acidic soils with low base saturation, 1-27 years before fine root sampling. The

Regional scale effects of base cation fertilization on Norway spruce and European beech stands situated on acid brown soils: soil and foliar chemistry

“…The addition of potassium sulphate (F2 treatment) was apparently not sufficient to maintain K concentrations at levels similar to those of the control (table VI, 1997). Such decrease probably resulted from the displacement of resident K by Ca [2,30]. By contrast, dolomite did not decrease exchangeable K contents at the 0-10 cm level in the spruce stands, whatever the period (tables V and VI).…”

“…This could be due to an increased Ca-K absorption antagonism at the plant level resulting from the relative increase of exchangeable Ca in the soil. This suggests a risk of induced-K deficiency following liming in case of low initial K concentrations in the soil [2,4,10,33]. The simultaneous application of potassium sulphate with dolomite (F2 treatment) tended to raise the K foliar concentrations for both species, in comparison to the CONTROL (table VIII).…”

“…Synthetising these results, it seems that a moderate pH increase after base cation fertilization on acid soils is likely to produce an increase of Zn plant uptake. Bakker (1999) showed that the uptake of different micronutrients could be improved after fertilization by positive effect on mycorrhizae. With further increase in pH, however, insolubilisation of soil Zn could cause a decrease in Zn availability.…”

Evolution of forest soil properties after liming with a by-product derived from a sugar beet mill

“…Bakker and Nys [17] studied the effects of liming on the evergreen Holm oak (Q. ilex) in soils with different fertility degrees, finding that (within the range of soil fertility of the area considered in the study) moderate doses of lime increased the biomass of fine roots, both in the topsoil and in the sub-superficial horizons, also favoring the availability of Ca and Mg, but not that corresponding to P and K. The effect of liming on some fractions of SOM and soil quality has been also considered [18,19].…”

“…This calcic material is difficult to handle due to its high hygroscopicity, which decreases its practical use elsewhere; but it could be used as liming material [24]. The addition of this by-product to soil meets two objectives: (1) eliminating this residue; and [17] raising the soil pH of the acid forest ecosystems.…”