Popis článkuPůdní skelet jako zdroj přístupných živin v lesních ekosystémech.
[Soil skeleton – source of available nutrients in forest ecosystems] 207 - 219.
|Půdní skelet jako zdroj přístupných živin v lesních ekosystémech
The concentration of selected nutrients in the fine earth (particles < 2 mm) and in two fractions of soil skeleton (2 – 10 and 10 – 30 mm) was studied. I used soil samples originated from profiles on very different parent bed rocks, from very poor sandstone to basalt and amfibolite that were very rich on nutrients. The extraction with Mehlich III of the mentioned fractions of soil skeleton resulted in remarkable amounts of phosphorus, potassium, calcium and magnesium as well. In some cases the concentrations in the coarse soil fractions were comparable with the concentrations in fine earth. The concentrations of Cox and Ntot in the soil skeleton particles were also significant. If we consider the share of soil skeleton on the total amounts of available nutrients in the soil profile, they can play an important part. Therefore it is not possible to neglect this amount in studies concerning distribution of elements and nutrient cycling in forest ecosystems.