Calidad de agropiro alargado (Thinopyrum ponticum) en estado vegetativo en relación con la edad y longitud de las hojas
The effect of leaf age and length on leaf blade quality was studied in wheatgrass leaf blades leaves (Thinopyrum ponticum cv. Hulk) from swards of two heights. Swards were grown in plots in a greenhouse (17± 4 ºC)in a randomized block design (n=3) of 160 plots/block. Leaves in 6 ontogenic stages fro...
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Online Access: | http://ria.inta.gov.ar/wp-content/uploads/2013/03/Art.9-Agropiro.pdf |
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doaj-838efe4fef8048d5a9b6985ccc95a2da2020-11-24T23:14:50ZengInstituto Nacional de Tecnología Agropecuaria (INTA)RIA: Revista Investigaciones Agropecuarias0325-87181669-23142013-04-01391105110Calidad de agropiro alargado (Thinopyrum ponticum) en estado vegetativo en relación con la edad y longitud de las hojasDI MARCO, O.N.HARKES, H.AGNUSDEI, M.GThe effect of leaf age and length on leaf blade quality was studied in wheatgrass leaf blades leaves (Thinopyrum ponticum cv. Hulk) from swards of two heights. Swards were grown in plots in a greenhouse (17± 4 ºC)in a randomized block design (n=3) of 160 plots/block. Leaves in 6 ontogenic stages from 3 consecutive leaf generations (from early growth to advanced senescence) were obtained from vegetative tillers (~200/harvest) harvested along 52 days of regrowth, with a frequency 80 GDD (growing degree days: Σ t1/2- 4,5 ºC). The leaf lifespan (LLS), leaf appearance interval (LAI), leaf and sheath lengths, NDF content and NDF digestibility (NDFD) were measured. The relationships among quality and morphogenic parameters were studied by linear regression and data analyzed as a complete randomized block design with factorial arrangement (2 heights x 3 leaf generations) and means compared by Tukey test (5%). The shorter leaf sward (241.8 vs 458.4 mm) had longer LLS (453.6 vs 337.8 GGD), similar NDF content and higher NDFD (~10%). In both swards the NDFD decreased linearly with leaf age and length, but NDF remained unchanged during the LLS. It is concluded that the NDFD declines with leaf age and length during regrowth, however shorter sward height delays senescence (>LLS), increases tiller leaving leaf number and improves leaf blade quality.http://ria.inta.gov.ar/wp-content/uploads/2013/03/Art.9-Agropiro.pdfgrowthNDF contentNDF digestibilitleaf ageleaf length |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
DI MARCO, O.N. HARKES, H. AGNUSDEI, M.G |
spellingShingle |
DI MARCO, O.N. HARKES, H. AGNUSDEI, M.G Calidad de agropiro alargado (Thinopyrum ponticum) en estado vegetativo en relación con la edad y longitud de las hojas RIA: Revista Investigaciones Agropecuarias growth NDF content NDF digestibilit leaf age leaf length |
author_facet |
DI MARCO, O.N. HARKES, H. AGNUSDEI, M.G |
author_sort |
DI MARCO, O.N. |
title |
Calidad de agropiro alargado (Thinopyrum ponticum) en estado vegetativo en relación con la edad y longitud de las hojas |
title_short |
Calidad de agropiro alargado (Thinopyrum ponticum) en estado vegetativo en relación con la edad y longitud de las hojas |
title_full |
Calidad de agropiro alargado (Thinopyrum ponticum) en estado vegetativo en relación con la edad y longitud de las hojas |
title_fullStr |
Calidad de agropiro alargado (Thinopyrum ponticum) en estado vegetativo en relación con la edad y longitud de las hojas |
title_full_unstemmed |
Calidad de agropiro alargado (Thinopyrum ponticum) en estado vegetativo en relación con la edad y longitud de las hojas |
title_sort |
calidad de agropiro alargado (thinopyrum ponticum) en estado vegetativo en relación con la edad y longitud de las hojas |
publisher |
Instituto Nacional de Tecnología Agropecuaria (INTA) |
series |
RIA: Revista Investigaciones Agropecuarias |
issn |
0325-8718 1669-2314 |
publishDate |
2013-04-01 |
description |
The effect of leaf age and length on leaf blade quality was studied in wheatgrass leaf blades leaves (Thinopyrum ponticum cv. Hulk) from swards of two heights. Swards were grown in plots in a greenhouse (17± 4 ºC)in a randomized block design (n=3) of 160 plots/block. Leaves in 6 ontogenic stages from 3 consecutive leaf generations (from early growth to advanced senescence) were obtained from vegetative tillers (~200/harvest) harvested along 52 days of regrowth, with a frequency 80 GDD (growing degree days: Σ t1/2- 4,5 ºC). The leaf lifespan (LLS), leaf appearance interval (LAI), leaf and sheath lengths, NDF content and NDF digestibility (NDFD) were measured. The relationships among quality and morphogenic parameters were studied by linear regression and data analyzed as a complete randomized block design with factorial arrangement (2 heights x 3 leaf generations) and means compared by Tukey test (5%). The shorter leaf sward (241.8 vs 458.4 mm) had longer LLS (453.6 vs 337.8 GGD), similar NDF content and higher NDFD (~10%). In both swards the NDFD decreased linearly with leaf age and length, but NDF remained unchanged during the LLS. It is concluded that the NDFD declines with leaf age and length during regrowth, however shorter sward height delays senescence (>LLS), increases tiller leaving leaf number and improves leaf blade quality. |
topic |
growth NDF content NDF digestibilit leaf age leaf length |
url |
http://ria.inta.gov.ar/wp-content/uploads/2013/03/Art.9-Agropiro.pdf |
work_keys_str_mv |
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