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The development of above-ground biomass in unmanaged grasslands and its influence on the leakage of water and the amount of elements found

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  • J. Fiala

    (Research Institute of Crop Production. Prague-Ruzyne, Grassland Research Station Liberec, Czech Republic)

Abstract

The influence of various forms of farming on unmanaged grasslands was monitored with regard to the accumulation of the above-ground biomass (litter + mulching) and its influence on the leakage of rainfall and the amount of elements in lysimetric waters. In 2001-2005, the highest accumulation was observed in variants 1× mulched in the later term and on green fallow (on average 2.11-1.13 t of dry matter/ha). In comparison with the control site, a conclusive increase always occurred. An interannual increase of dry matter amounted to 0.4-5.2% of the total above-ground biomass. A negative correlative dependency on rainfall leakage on this material was discovered; at a depth of 0.4 m 4-10% of the rainfall leaked, but it had a significant influence on the wash out of Ca, Mg and S. The leakage of water affected a wash out of Nmin, P, K, Ca, Mg and S more than the weight of dry matter of the above-ground biomass. With the exception of P, the elements showed a downward tendency over five years. The above-mentioned forms of farming annually increased the accumulation of the above-ground biomass by 0.05-0.16 t of dry matter/ha; however, they do not endanger underground waters by washing out minerals. After a five-year period, a disturbance of the ecological stability of grassland did not occur.

Suggested Citation

  • J. Fiala, 2007. "The development of above-ground biomass in unmanaged grasslands and its influence on the leakage of water and the amount of elements found," Plant, Soil and Environment, Czech Academy of Agricultural Sciences, vol. 53(1), pages 42-50.
    • Handle: RePEc:caa:jnlpse:v:53:y:2007:i:1:id:3192-pse
    DOI: 10.17221/3192-PSE
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    References listed on IDEAS

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    1. J. Gaisler & M. Hejcman & V. Pavlů, 2004. "Effect of different mulching and cutting regimes on the vegetation of upland meadow," Plant, Soil and Environment, Czech Academy of Agricultural Sciences, vol. 50(7), pages 324-331.
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