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Influence of different systems of grazing, type of swards and fertilizing on underground phytomass of pastures

Author

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  • S. Hejduk

    (Mendel University of Agriculture and Forestry in Brno, Czech Republic)

  • F. Hrabě

    (Mendel University of Agriculture and Forestry in Brno, Czech Republic)

Abstract

Problems concerning total dry weight and distribution of underground phytomass were studied in a pasture trial at Rapotin near Šumperk, the CzechRepublicin the period 1995-1999. The total weight of dry underground pasture phytomass (DUP) was 976 g/m2 (5-year average) in a soil layer of 0-200 mm (both live and dead roots). The DUP was significantly increased by mineral fertilizers (90 kg N/ha, 30 kg P/ha a 90 kg K/ha). The weight of DUP was not significantly influenced by a grazing system, renewal or resowing of the original grassland. In unfertilized plots, DUP weight amounted to 989 g/m2, i.e. 92 g/m2 (8.6%) less than in fertilized plots in the period 1996-1999. In the same period, under the grassland exploited by rotational grazing 1142 and under continuous grazing 1082 g/m2 DUP were determined, i.e. by 60 g/m2 (5.5%) less. The highest DUP weight in the period 1996-1999 was found in autumn 1997 (1222 g/m2) immediately before achieving the maximum forage yield in May 1998. In a layer of 0-20 mm, 54.6% of the total DUP was found. In this surface layer, significant increase in the DUP weight was found in fertilized plots. In 1999, some 88.5 and 90.2% of DUP were concentrated in unfertilized (903 g/m2) and fertilized (952 g/m2) plots, respectively in a layer of 0-100 mm.

Suggested Citation

  • S. Hejduk & F. Hrabě, 2003. "Influence of different systems of grazing, type of swards and fertilizing on underground phytomass of pastures," Plant, Soil and Environment, Czech Academy of Agricultural Sciences, vol. 49(1), pages 18-23.
    • Handle: RePEc:caa:jnlpse:v:49:y:2003:i:1:id:4084-pse
    DOI: 10.17221/4084-PSE
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    Cited by:

    1. L. Růžek & M. Nováková & K. Voříšek & I. Skořepová & L. Vortelová & Z. Kalfařová & J. Černý & T. Částka & W. Barabasz, 2005. "Microbial biomass-C determined using CaCl2 and K2SO4 as extraction reagents," Plant, Soil and Environment, Czech Academy of Agricultural Sciences, vol. 51(10), pages 439-446.
    2. D.S. Sun & K. Wesche & D.D. Chen & S.H. Zhang & G.L. Wu & G.Z. Du & N.B. Comerford, 2011. "Grazing depresses soil carbon storage through changing plant biomass and composition in a Tibetan alpine meadow," Plant, Soil and Environment, Czech Academy of Agricultural Sciences, vol. 57(6), pages 271-278.
    3. P. Holub & I. Tůma & K. Fiala, 2013. "Effect of fertilization on root growth in the wet submontane meadow," Plant, Soil and Environment, Czech Academy of Agricultural Sciences, vol. 59(8), pages 342-347.

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