caa a22 4500 606220283 CHVBK 20210128101122.0 cr unu---uuuuu 210128e20150801xx s 000 0 eng 10.1007/s11104-015-2472-y doi (NATIONALLICENCE)springer-10.1007/s11104-015-2472-y Non-linear dynamics of litter decomposition under different grazing management regimes [Elektronische Daten] [Natalia Banegas, Ada Albanesi, Raúl Pedraza, Daniel Dos Santos] Aims: To understand and model the dynamics of litter decomposition in a climatically seasonal region subject to different modalities of land pasture management. Methods: Decomposition was quantified through the litterbag technique. Sampling was performed at monthly intervals on an annual basis with replications for 2008, 2009 and 2010. Treatments were native vegetation (NV) and grazed (G), grazed and N-fertilized (GF), hayed (H), hayed and N-fertilized (HF) plots. For each combination of treatment and year, a sigmoid model was fitted. Parameters included remnant litter, steepness and inflection of decomposition curve. Results: The sigmoid model adjusted excellently well the data. In considering the overall effect on litter decomposition, treatments differ among them as follows symbolically: ((GF > G) > (HF > H)) > > NV. Results are consistent across the yearly replications. Conclusion: Pasture management (grazed versus hayed) is the primary factor controlling the rate of decomposition, whereas fertilization has a secondary role. The sigmoid model captures realistically the different phases of decomposition detected over a year, namely stationary at conditions of low temperature (later autumn and winter), accelerated at increasing temperature and humidity (transition from spring to summer) and decelerated when residual organic matter becomes less profitable and weather conditions more stringent (summer and earlier autumn). Springer International Publishing Switzerland, 2015 Chaco nationallicence Sigmoid model nationallicence Grazing nationallicence Cattle nationallicence Nitrogen nationallicence Chloris gayana nationallicence Banegas Natalia Instituto de Investigación Animal del Chaco Semiárido, INTA, Chañar Pozo S/N (4113), Leales, Tucumán, Argentina aut Albanesi Ada Facultad de Agronomía y Agroindustrias - Universidad Nacional de Santiago del Estero, Avenida Belgrano 1912 (4200), Santiago del Estero, Argentina aut Pedraza Raúl Facultad de Agronomía y Zootecnia - Universidad Nacional de Tucumán, Avenida Kirchner 1900 (4000), San Miguel de Tucumán, Tucumán, Argentina aut Dos Santos Daniel Instituto de Biodiversidad Neotropical, CONICET - UNT, Miguel Lillo 205 (4000), San Miguel de Tucumán, Tucumán, Argentina aut Plant and Soil Springer International Publishing 393/1-2(2015-08-01), 47-56 0032-079X 393:1-2<47 2015 393 11104 https://doi.org/10.1007/s11104-015-2472-y text/html Onlinezugriff via DOI BK010053 XK010053 XK010000 Metadata rights reserved Springer special CC-BY-NC licence nationallicence 1 research-article jats NATIONALLICENCE NATIONALLICENCE NL-springer NATIONALLICENCE 856 40 https://doi.org/10.1007/s11104-015-2472-y text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Banegas Natalia Instituto de Investigación Animal del Chaco Semiárido, INTA, Chañar Pozo S/N (4113), Leales, Tucumán, Argentina aut NATIONALLICENCE 700 1- Albanesi Ada Facultad de Agronomía y Agroindustrias - Universidad Nacional de Santiago del Estero, Avenida Belgrano 1912 (4200), Santiago del Estero, Argentina aut NATIONALLICENCE 700 1- Pedraza Raúl Facultad de Agronomía y Zootecnia - Universidad Nacional de Tucumán, Avenida Kirchner 1900 (4000), San Miguel de Tucumán, Tucumán, Argentina aut NATIONALLICENCE 700 1- Dos Santos Daniel Instituto de Biodiversidad Neotropical, CONICET - UNT, Miguel Lillo 205 (4000), San Miguel de Tucumán, Tucumán, Argentina aut NATIONALLICENCE 773 0- Plant and Soil Springer International Publishing 393/1-2(2015-08-01), 47-56 0032-079X 393:1-2<47 2015 393 11104