Increase in forage yield in narrowleaf birdsfoot trefoil (Lotus tenuis Waldst & Kit ex Willd) in a permanent pasture with foliar applied gibberellic acid (GA3), and phosphorus

Lotus tenuis is a perennial legume with a good adaptation to infertile, heavy and waterlogging soils. It can replace alfalfa in these sites with a similar feeding value. An important constraint is its weak competitive capacity with other graminae and weed species in permanent pastures, having conseq...

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Autores principales: Clua, Ariel Adrián, Giménez, Daniel Oscar, Fernández, Laura Virginia
Formato: Articulo
Lenguaje:Inglés
Publicado: 1997
Materias:
Ingeniería Agronómica
foliar fertilization
forage yield
gibberellic acid
Lotus tenuis
phosphorus
Acceso en línea:http://sedici.unlp.edu.ar/handle/10915/141576
Aporte de:
SEDICI (UNLP) de Universidad Nacional de La Plata
id I19-R120-10915-141576
record_format dspace
institution Universidad Nacional de La Plata
institution_str I-19
repository_str R-120
collection SEDICI (UNLP)
language Inglés
topic Ingeniería Agronómica
foliar fertilization
forage yield
gibberellic acid
Lotus tenuis
phosphorus
spellingShingle Ingeniería Agronómica
foliar fertilization
forage yield
gibberellic acid
Lotus tenuis
phosphorus
Clua, Ariel Adrián
Giménez, Daniel Oscar
Fernández, Laura Virginia
Increase in forage yield in narrowleaf birdsfoot trefoil (Lotus tenuis Waldst & Kit ex Willd) in a permanent pasture with foliar applied gibberellic acid (GA3), and phosphorus
topic_facet Ingeniería Agronómica
foliar fertilization
forage yield
gibberellic acid
Lotus tenuis
phosphorus
description Lotus tenuis is a perennial legume with a good adaptation to infertile, heavy and waterlogging soils. It can replace alfalfa in these sites with a similar feeding value. An important constraint is its weak competitive capacity with other graminae and weed species in permanent pastures, having consequently a poor forage yield. The objective of the present research is to overcome this disadvantage, enhancing its competitive ability with foliar applications of GA3 (GA) and phosphorus (P), increasing L. tenuis forage yield. Field experiments were conducted during 1994 with foliar application of GA (50 mg.l-1) and during 1995 with foliar application of GA (25 and 50 mg.l-1), phosphorus (8 kg.ha-1, as P2O5) and their combinations, in permanent pastures with L. tenuis and other companion grasses. In 1994 GA 50 increased significantly L. tenuis dry matter (DML) in 64.6% but not the dry matter of graminae fraction (DMG) and in consequence the total dry matter of the pasture (TDMP) was increased. In 1995 all GA treatments and their combinations with phosphorus enhanced DML but not DMG. In this sense GA 25 + P was the most effective treatment with a 151% increment of DML. Consequently TDMP was significantly increased due to a larger participation of L. tenuis in the forage yield. This increase was achieved due to a greater length and diameter of L. tenuis branches, with a logical modification in leaf:stem ratio. Moreover GA treatments reduced L. tenuis flower number. Phosphorus treatment, applied alone, showed an increase in the DML. GA treatments did not modify the feeding value of the forage in L. tenuis and graminae fractions, except GA 50 and GA 50 + P in acid detergent fiber (ADF), neutral detergent fiber (NDF) and crude protein (CP), respect to the control. The total crude protein (CP.m-2) was enhanced in all GA and GA + P treatments. Foliar GA3 and phosphorus spray applications increased the competitiveness of trefoil for light, on account of morphological changes in the spatial disposition of L. tenuis stems reaching faster the top of the pasture canopy. This practice can be an adequate alternative to increase the forage yield and total crude protein in permanent and cultivated pastures with a low cost-benefit ratio.
format Articulo
Articulo
author Clua, Ariel Adrián
Giménez, Daniel Oscar
Fernández, Laura Virginia
author_facet Clua, Ariel Adrián
Giménez, Daniel Oscar
Fernández, Laura Virginia
author_sort Clua, Ariel Adrián
title Increase in forage yield in narrowleaf birdsfoot trefoil (Lotus tenuis Waldst & Kit ex Willd) in a permanent pasture with foliar applied gibberellic acid (GA3), and phosphorus
title_short Increase in forage yield in narrowleaf birdsfoot trefoil (Lotus tenuis Waldst & Kit ex Willd) in a permanent pasture with foliar applied gibberellic acid (GA3), and phosphorus
title_full Increase in forage yield in narrowleaf birdsfoot trefoil (Lotus tenuis Waldst & Kit ex Willd) in a permanent pasture with foliar applied gibberellic acid (GA3), and phosphorus
title_fullStr Increase in forage yield in narrowleaf birdsfoot trefoil (Lotus tenuis Waldst & Kit ex Willd) in a permanent pasture with foliar applied gibberellic acid (GA3), and phosphorus
title_full_unstemmed Increase in forage yield in narrowleaf birdsfoot trefoil (Lotus tenuis Waldst & Kit ex Willd) in a permanent pasture with foliar applied gibberellic acid (GA3), and phosphorus
title_sort increase in forage yield in narrowleaf birdsfoot trefoil (lotus tenuis waldst & kit ex willd) in a permanent pasture with foliar applied gibberellic acid (ga3), and phosphorus
publishDate 1997
url http://sedici.unlp.edu.ar/handle/10915/141576
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