Humus conditions and stand characteristics of artificially established young stands in the process of the transformation of spruce monocultures
2009
Mensik, L.,Mendelova Zemedelska a Lesnicka Univ., Brno (Czech Republic). Ustav Ekologie Lesa | Fabianek, T.,Mendelova Zemedelska a Lesnicka Univ., Brno (Czech Republic). Ustav Ekologie Lesa | Tesar, V.,Mendelova Zemedelska a Lesnicka Univ., Brno (Czech Republic). Ustav Zakladani a Pesteni Lesu | Kulhavy, J.,Mendelova Zemedelska a Lesnicka Univ., Brno (Czech Republic). Ustav Ekologie Lesa
The presented study compares humus conditions and basic growth characteristics of two mixed stands (spruce with beech and larch with beech) aged 25 years with a beech stand (aged 40 years) and spruce stand (aged 30 years). The purpose of the study was to evaluate (i) forms of forest floor, (ii) soil reaction, (iii) the content and total reserves of carbon, nitrogen and C/N ratio, (iv) dissolved organic carbon (DOC) in relation to stand characteristics. The highest reserve of forest floor was detected in the mixed stand of larch with beech (52.6 t/ha), the lowest reserve in the beech stand (21.0 t/ha). The soil reaction of the spruce stand and the beech stand was 4.0 (+/-0.3) and 5.1 (+/-0.3), respectively. The C/N ratio of the spruce stand was 23.5 (+/-1.8) and that of the beech stand 18.8+/-2.9. The DOC content decreases with layers of surface humus towards depth. Mixed stands represent by their values of soil conditions a mean between spruce and beech stands.
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