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Abstract
Subtropical pastures are an important alternative to increase forage yields to fulfil cattle nutritional requirements. Despite the increasing expansion of these pastures in the semiarid subtropical region of Argentina, there is very little information about their responses to grazing management. The aim of this study was to evaluate the ef‐fect of different defoliation regimes on morphogenesis, sward structure and leaf area index of one of the most [ver mas...]
dc.contributor.authorRuolo, Maria Soledad
dc.contributor.authorPerez, Hector Eduardo
dc.contributor.authorRodríguez, Adriana Mabel
dc.date.accessioned2021-08-24T11:00:20Z
dc.date.available2021-08-24T11:00:20Z
dc.date.issued2019-10-09
dc.identifier.issn0142-5242
dc.identifier.otherhttps://doi.org/10.1111/gfs.12451
dc.identifier.urihttp://hdl.handle.net/20.500.12123/10094
dc.identifier.urihttps://onlinelibrary.wiley.com/doi/abs/10.1111/gfs.12451
dc.description.abstractSubtropical pastures are an important alternative to increase forage yields to fulfil cattle nutritional requirements. Despite the increasing expansion of these pastures in the semiarid subtropical region of Argentina, there is very little information about their responses to grazing management. The aim of this study was to evaluate the ef‐fect of different defoliation regimes on morphogenesis, sward structure and leaf area index of one of the most expanded forage species in this region, Chloris gayana Kunth. A combination of two defoliation frequencies (300 and 500 GDD) and two defolia‐tion intensities (1 and 3 green stubble leaves) was compared by a controlled experi‐ment that comprised 1,500 GDD. Defoliation frequency significantly affected leaf elongation rate (LER) and leaf area index (LAI). Under the high defoliation frequency, LER and LAI resulted almost half than under low defoliation frequency (0.34 ± 0.08 vs. 0.67 ± 0.08 mm·tiller−1·GDD−1; 8.31 ± 2.27 m2/m2 vs. 13.27 ± 1.59 m2/m2, at 300 or 500 GDD respectively), regardless of the intensity. Defoliation frequency or inten‐sity did not affect leaf appearance rate, leaf lifespan, leaf size, number of green leaves per tiller nor tiller density at the end of the experiment. We conclude that to maintain high LER and LAI in Chloris gayana Kunth cv. Épica INTA‐Pemán pastures, defoliation frequency could be of 500 GDD. Since leaf lifespan was 415 ± 110 GDD, under this defoliation frequency, a maximum accumulation of green leaf tissues with very little dead tissues may be achieved.eng
dc.formatapplication/pdfes_AR
dc.language.isoenges_AR
dc.relationinfo:eu-repograntAgreement/INTA/PNPA-1126072/AR./Desarrollo de cultivares superiores de especies forrajeras para sistemas ganaderos y agricolo-ganaderos de la Argentina.es_AR
dc.relationinfo:eu-repograntAgreement/INTA/PNFOR-1104083/AR./Manejo de sistemas silvopastoriles en bosques nativos.es_AR
dc.relationinfo:eu-repograntAgreement/INTA/CORDO-1262205/AR./Proyecto regional del territorio agrícola ganadero central de la provincia de Córdoba.es_AR
dc.relationinfo:eu-repograntAgreement/INTA/CORDO-1262204/AR./Gestión de la innovación en el territorio del arco noroeste de la provincia de Córdoba.es_AR
dc.relationinfo:eu-repograntAgreement/INTA/PNPA-1126073/AR./Pasturas ecoeficientes y de bajo carbono en ganadería.es_AR
dc.rightsinfo:eu-repo/semantics/restrictedAccesses_AR
dc.sourceGrass and Forage Science 74 (4) : 720-727 (December 2019)es_AR
dc.subjectForrajeses_AR
dc.subjectPastoreoes_AR
dc.subjectDefoliaciónes_AR
dc.subjectForageeng
dc.subjectGrazingeng
dc.subjectChloris gayana
dc.subjectDefoliationeng
dc.titleChloris gayana Kunth under different defoliation regimes. Morphogenesis, sward structure and leaf area indexes_AR
dc.typeinfo:ar-repo/semantics/artículoes_AR
dc.typeinfo:eu-repo/semantics/articlees_AR
dc.typeinfo:eu-repo/semantics/publishedVersiones_AR
dc.description.origenEEA Manfredies_AR
dc.description.filFil: Ruolo, M.S. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Manfredi; Argentina.es_AR
dc.description.filFil: Ruolo, M.S. Universidad Nacional de Córdoba. Facultad de Ciencias Agropecuarias. Cátedra de Forrajes y Manejo de Pasturas; Argentina.es_AR
dc.description.filFil: Pérez, H. E. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Manfredi; Argentina.es_AR
dc.description.filFil: Rodríguez, A. M. Universidad de Buenos Aires. Facultad de Agronomía. Cátedra de Forrajicultura; Argentinaes_AR
dc.subtypecientifico


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