Plant Species and Defoliation Efects on Soil Nitrogen Mineralization in a Semiarid Rangeland of Argentina

dc.creatorAmbrosino, Mariela Lis
dc.creatorMartínez, Juan Manue
dc.creatorBusso, Carlos
dc.creatorMinoldo, Gabriela
dc.creatorTorres, Yanina Alejandra
dc.creatorIthurrart, Leticia Soledad
dc.creatorCardillo, Daniela Solange
dc.date2021-08-02
dc.date.accessioned2022-10-16T23:01:52Z
dc.date.available2022-10-16T23:01:52Z
dc.identifierhttps://digital.cic.gba.gob.ar/handle/11746/11335
dc.identifier.urihttps://repositorioslatinoamericanos.uchile.cl/handle/2250/4413564
dc.descriptionThe objective of this study was to evaluate the efects of moderate defoliation and grass species on soil nitrogen (N) mineralization in a semiarid grassland of northeastern Patagonia, Argentina. Studied species were Poa ligularis and Nassella tenuis (desirable/preferred by cattle) and Amelichloa ambigua (undesirable/non preferred). Two defoliations were made to a 5 cm stubble height during the growing season. Hypotheses were that (1) net N mineralization and N availability in the soil are increased by a moderate defoliation and greater species forage quality, and (2) potential N mineralization is higher in the soil beneath the desirable than undesirable species. In 2013 and 2014, in situ net N mineralization was estimated using the tube incubation technique under feld conditions. Potential N mineralization was estimated by long-term laboratory incubations. Defoliation treatments did not afect the soil inorganic N dynamics. The soil under A. ambigua showed a greater in situ net N mineralization than other species, but only in 2013. Poa ligularis presented the highest initial inorganic N and potentially mineralizable N values. However, the opposite was recorded in this specie for the mineralization constant rate. These results demonstrated that moderate defoliations did not afect soil N availability, and presence of the desirable perennial grasses increased the potential N mineralization pool. Sustainable management practices that promote the persistence of these species in plant community are important to maintain soil fertility on semiarid grasslands.
dc.formatapplication/pdf
dc.format2511–2517
dc.languageInglés
dc.relationdoi:10.1007/s42729-021-00542-9
dc.relationISSN:0718-9516
dc.relationISSN:0718-9508
dc.rightshttp://creativecommons.org/licenses/by-nc-nd/4.0/
dc.subjectAgronomía, reproducción y protección de plantas
dc.subjectPoa ligularis
dc.subjectNassella tenuis
dc.subjectAmelichloa ambigua
dc.subjectPerennial grasses
dc.subjectInorganic soil N
dc.titlePlant Species and Defoliation Efects on Soil Nitrogen Mineralization in a Semiarid Rangeland of Argentina


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