ŠÍR, Miloslav, Ľubomír LICHNER, Miroslav TESAŘ, Miroslav KREJČA and Jan VÁCHAL. Soil Water Retention and Gross Primary Productivity in the Zábrod area in the Šumava Mts. Soil and Water Research. 2008, No 1, 9 pp. ISSN 1801-5395.
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Basic information
Original name Soil Water Retention and Gross Primary Productivity in the Zábrod area in the Šumava Mts.
Name in Czech Retence půdní vody a hrubá primární produktivita na ploše Zábrod na Šumavě
Authors ŠÍR, Miloslav, Ľubomír LICHNER, Miroslav TESAŘ, Miroslav KREJČA and Jan VÁCHAL.
Edition Soil and Water Research, 2008, 1801-5395.
Other information
Original language English
Type of outcome Article in a journal
Field of Study 10000 1. Natural Sciences
Country of publisher Czech Republic
Confidentiality degree is not subject to a state or trade secret
Keywords in English hydrologic cycle; evapotranspiration; gross primary productivity; entropy production; soil water retention
Links AV0Z20600510, plan (intention). 1QS200420562, research and development project.
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Abstract
The synergy between hydrologic extremes, plant transpiration, gross primary productivity, and soil water retention was studied in the experimental area Zábrod - meadow in the Šumava Mts. (Bohemian Forest) during vegetative seasons of 1983-2000. Heat balance, potential and actual transpiration, entropy production and gross primary productivity were evaluated. It was found that global radiation, precipitation amount and the soil water retention are the crucial factors determining hydrologic pattern and gross primary productivity. Insufficient soil water retention leads to small entropy production by evaporation and small gross primary productivity, which results in the extremalization of the hydrologic cycle. On the other hand, in the case of sufficient soil water retention, high entropy production by transpiration and high gross primary productivity leads to the stability of the hydrologic cycle.
Abstract (in Czech)
Na experimentální ploše Zábrod - louka byla v letech 1983 - 2000 studována synergie mezi hydrologickými extrémy, transpirací rostlin, hrubou primární produktivitou a retencí vody v půdě. Byl vyhodnocena tepelná bilance, potenciální a aktuální transpirace, produkce entropie při evaporaci a hrubá primární produktivita. Bylo zjištěno, že rozhodujícími faktory, které determinují produktivitu fytomasy, jsou globální radiace, množství srážek a retence vody v půdě. Nedostatečná retence vede k nízké produkci entropie a nízké produktivitě fytomasy, což způsobuje extremalizaci hydrologického cyklu. Avšak pokud je dostatečná zásoba vody v půdě, pak vysoká transpirace, vysoká produkce entropie při evaporaci a vysoká primární produktivita stabilizuje hydrologický cyklus.
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