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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
Di Marco, Oscar Norberto
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dc.date.available
2019-06-28T19:02:48Z
dc.date.issued
2017-01-23
dc.identifier.citation
Insua, Juan Ramón; Agnusdei, Mónica Graciela; Di Marco, Oscar Norberto; Leaf morphogenesis influences nutritive-value dynamics of tall fescue (Lolium arundinaceum) cultivars of different leaf softness; Csiro Publishing; Crop & Pasture Science; 68; 1; 23-1-2017; 51-61
dc.identifier.issn
1836-0947
dc.identifier.uri
http://hdl.handle.net/11336/78916
dc.description.abstract
The objective of this study was to compare the dynamics of neutral detergent fibre (NDF), and the 24-h in-vitro digestibility of NDF (NDFD) and dry matter (DMD) in leaf blades of two tall fescue (Lolium arundinaceum (Schreb.) Darbysh.) cultivars of different leaf softness: a soft- and a tough-leaved cultivar. The experiment was conducted during the summer regrowth of three replicated, dense mini-swards per cultivar arranged in a completely randomised design, all grown under non-limiting water, nitrogen and phosphorus. Cultivars were harvested eight times over 14 weeks to measure morphogenetic traits and nutritive value in six predefined leaf-age categories (from growing to complete senescence). The leaf lifespan and leaf length of the first three successive leaves were measured on 30 marked tillers throughout the experiment. Following analysis of variance, linear regression models were fitted to describe variations of NDF, NDFD and DMD with increasing leaf age and leaf length. Similar leaf NDF contents were found for the two cultivars, which remained stable throughout the leaf lifespan and increased markedly during leaf senescence. Leaf NDFD and leaf DMD both declined with increasing leaf age and length for the two cultivars. However, owing to shorter leaf lifespan of the soft-leaved cultivar, this decline in leaf NDFD and leaf DMD was faster for the soft- than for the tough-leaved cultivar. These results suggest that the soft-leaved cultivar will require more frequent defoliations than the tough-leafed cultivar to prevent decreases in nutritive value.
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
Defoliation
dc.subject
Leaf Development
dc.subject
Leaf Morphology
dc.subject
Leaf Stage
dc.subject
Leaf Turnover
dc.subject
Temperate Grasses
dc.subject.classification
Otras Producción Animal y Lechería
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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
Leaf morphogenesis influences nutritive-value dynamics of tall fescue (Lolium arundinaceum) cultivars of different leaf softness
dc.type
info:eu-repo/semantics/article
dc.type
info:ar-repo/semantics/artículo
dc.type
info:eu-repo/semantics/publishedVersion
dc.date.updated
2019-06-10T21:31:34Z
dc.identifier.eissn
1836-5795
dc.journal.volume
68
dc.journal.number
1
dc.journal.pagination
51-61
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. Centro Científico Tecnológico Conicet - Mar del Plata; Argentina. Instituto Nacional de Tecnología Agropecuaria. Centro de Investigación de Agroindustria; Argentina
dc.description.fil
Fil: Agnusdei, Mónica Graciela. Instituto Nacional de Tecnología Agropecuaria; Argentina
dc.description.fil
Fil: Di Marco, Oscar Norberto. Universidad Nacional de Mar del Plata; Argentina
dc.journal.title
Crop & Pasture Science
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dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/doi/http://dx.doi.org/10.1071/CP16254
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/url/http://www.publish.csiro.au/cp/CP16254
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