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dc.contributor.author
Insua, Juan Ramón
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dc.contributor.author
Agnusdei, Mónica Graciela
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dc.contributor.author
Utsumi, S.
dc.contributor.author
Berone, Germán Darío
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dc.date.available
2019-10-01T17:33:17Z
dc.date.issued
2018-11-05
dc.identifier.citation
Insua, Juan Ramón; Agnusdei, Mónica Graciela; Utsumi, S.; Berone, Germán Darío; Morphological, environmental and management factors affecting nutritive value of tall fescue (Lolium arundinaceum); Csiro Publishing; Crop & Pasture Science; 69; 11; 5-11-2018; 1165-1172
dc.identifier.issn
1836-5795
dc.identifier.uri
http://hdl.handle.net/11336/84927
dc.description.abstract
The aim of this study was to quantify the relative importance of leaf age and leaf length on the dynamics of neutral detergent fibre (NDF), and 24-h in vitro digestibility of NDF (NDFD) and dry matter (DMD) of tall fescue (Lolium arundinaceum (Schreb) Darbysh.). Mini-swards were conditioned and used to conduct two experiments, the first with 4-cm plant stubble height in spring-summer 2009 and autumn-winter 2011, and the second with 4-cm or 10-cm plant stubble height in spring-summer 2011. Plants were harvested at consecutive leaf-appearance intervals to measure nutritive value up to the four-leaf stage. In parallel, leaf morphogenetic traits (appearance, elongation and lifespan) and sheath length of the successive leaves produced on marked tillers were measured. Leaf NDF contents remained stable with increasing leaf age and length but showed a marked variation across seasons. Leaf NDFD and DMD showed a consistent decrease with increasing leaf age and length, and irrespective of growing season or residual pasture height. The negative effect of leaf age and length on digestibility was related to variations in sheath tube length and associated differences in leaf appearance and elongation rates. These findings highlight the relevance of monitoring the sheath tube length as a complementary measure to leaf stage for further management of the NDFD and DMD of grass forages. Although the focus of this study was tall fescue swards, the same morphogenetic implications on forage nutritive value could apply to other temperate and tropical grass species; however, the testing of this hypothesis warrants carefully controlled investigations.
dc.format
application/pdf
dc.language.iso
eng
dc.publisher
Csiro Publishing
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dc.rights
info:eu-repo/semantics/openAccess
dc.rights.uri
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.subject
FESTUCA ARUNDINACEA
dc.subject
LEAF MORPHOGENESIS
dc.subject
RESIDUAL PASTURE HEIGHT.
dc.subject.classification
Ganadería
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dc.subject.classification
Producción Animal y Lechería
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dc.subject.classification
CIENCIAS AGRÍCOLAS
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dc.title
Morphological, environmental and management factors affecting nutritive value of tall fescue (Lolium arundinaceum)
dc.type
info:eu-repo/semantics/article
dc.type
info:ar-repo/semantics/artículo
dc.type
info:eu-repo/semantics/publishedVersion
dc.date.updated
2019-09-05T15:28:53Z
dc.journal.volume
69
dc.journal.number
11
dc.journal.pagination
1165-1172
dc.journal.pais
Australia
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dc.journal.ciudad
Collingwood
dc.description.fil
Fil: Insua, Juan Ramón. Universidad Nacional de Mar del Plata; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina
dc.description.fil
Fil: Agnusdei, Mónica Graciela. Instituto Nacional de Tecnología Agropecuaria; Argentina
dc.description.fil
Fil: Utsumi, S.. Michigan State University; Estados Unidos
dc.description.fil
Fil: Berone, Germán Darío. Instituto Nacional de Tecnología Agropecuaria; Argentina
dc.journal.title
Crop & Pasture Science
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dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/doi/https://doi.org/10.1071/CP18182
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/url/http://www.publish.csiro.au/CP/CP18182
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