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Titre du document / Document title

Establishment and early growth characteristics of six Paulownia genotypes for goat browse in Raleigh, NC, USA

Auteur(s) / Author(s)

MUELLER J. P. (1) ; LUGINBUHL J.-M. (1 2) ; BERGMANN B. A. (3) ;

Affiliation(s) du ou des auteurs / Author(s) Affiliation(s)

(1) Department of Crop Science, North Carolina State University, Raleigh, NC 27695, ETATS-UNIS
(2) Department of Animal Science, North Carolina State University, Raleigh, NC 27695, ETATS-UNIS
(3) Department of Forestry, North Carolina State University, Raleigh, NC 27695, ETATS-UNIS

Résumé / Abstract

Meat goat production in the eastern USA is increasing as a result of growing demand from various ethnic groups. Because goats naturally prefer a high proportion of browse in their diets, research was initiated to investigate various silvopastoral production systems. The genus Paulownia contains several species which exhibit rapid juvenile growth and other characteristics that justify research into their potential use in meat goat feeding systems. In May 1997, six Paulownia genotypes were planted in a randomized complete block experiment with six replications. Trees were between 6 and 12 cm in height at planting. Genotypes included: P. fortunei seedlings, P. tomentosa seedlings, P. elongata seedlings and three P. elongata clones. Each 4-m wide plot contained a single row of 12 trees with an intra-row spacing of 1 m. Plant measurements included height, root collar diameter (RCD) at 3 cm above soil surface, and the number of main branches. Leaf samples were collected from all six replications for estimates of herbage quality. During 1998, trees were browsed with goats on two occasions to assess palatability of the herbage and to determine any preference for specific genotypes by the animals. Compared with seedling trees of all three species, the three P. elongata clones were taller (clones: 79.7 cm, seedlings: 55.9 cm; P < 0.01), had larger RCDs (clones: 18.4 mm, seedlings: 13.9 mm; P < 0.01) and had a higher branching frequency (clones: 4.9, seedlings: 1.5; P < 0.01) by the end of the first growing season. Mortality averaged 4.8% across all treatments and ranged between 0 and 8%. Early in the 1998 growing season before trees were browsed, P. elongata clones grew more rapidly than seedlings (clones: 116.4 cm, seedlings: 84.1 cm; P < 0.01). Estimates of herbage quality indicated favorable concentrations of energy and protein for lamina. In vitro true dry matter disappearance ranged from 85.4 (blades) to 71.5% (petioles) and crude protein from 25.1 (blades) to 4.9% (petioles). Animals readily browsed the lamina during two separate sessions, but no clear preference trends were observed among the different Paulownia genotypes.

Revue / Journal Title

Agroforestry systems    ISSN  0167-4366   CODEN AGSYE6 

Source / Source

2001, vol. 52, no1, pp. 63-72 (18 ref.)

Langue / Language

Anglais

Editeur / Publisher

Springer, Dordrecht, PAYS-BAS  (1982) (Revue)

Mots-clés anglais / English Keywords

Growth

;

Plant emergence

;

Intraspecific comparison

;

Interspecific comparison

;

Grazing

;

Biomass

;

Digestibility

;

Production quality

;

Silvopastoral system

;

Goat

;

North Carolina

;

Clay soil

;

Agroforestry

;

Palatability

;

Plant juvenile growth stage

;

Artiodactyla

;

Ungulata

;

Mammalia

;

Vertebrata

;

United States

;

North America

;

America

;

Hardwood forest tree

;

Fodder crop

;

Farming animal

;

Scrophulariaceae

;

Dicotyledones

;

Angiospermae

;

Spermatophyta

;

Ultisols

;

Mots-clés français / French Keywords

Croissance

;

Levée plante

;

Comparaison intraspécifique

;

Comparaison interspécifique

;

Pâturage

;

Biomasse

;

Digestibilité

;

Qualité production

;

Système sylvopastoral

;

Chèvre

;

Caroline du Nord

;

Sol argileux

;

Agroforesterie

;

Palatabilité

;

Stade juvénile plante

;

Paulownia fortunei

;

Paulownia elongata

;

Paulownia tomentosa

;

Hapludult

;

Artiodactyla

;

Ungulata

;

Mammalia

;

Vertebrata

;

Etats Unis

;

Amérique du Nord

;

Amérique

;

Arbre forestier feuillu

;

Plante fourragère

;

Animal élevage

;

Scrophulariaceae

;

Dicotyledones

;

Angiospermae

;

Spermatophyta

;

Ultisol

;

Udult

;

Mots-clés espagnols / Spanish Keywords

Crecimiento

;

Emergencia planta

;

Comparación intraespecífica

;

Comparación interespecífica

;

Pastoreo

;

Biomasa

;

Digestibilidad

;

Calidad producción

;

Sistema silvopastoral

;

Cabra

;

Carolina del norte

;

Suelo arcilloso

;

Agroforestal

;

Palatabilidad

;

Estado juvenil planta

;

Artiodactyla

;

Ungulata

;

Mammalia

;

Vertebrata

;

Estados Unidos

;

America del norte

;

America

;

Arbol forestal frondoso

;

Planta forrajera

;

Animal cría

;

Scrophulariaceae

;

Dicotyledones

;

Angiospermae

;

Spermatophyta

;

Ultisols

;

Localisation / Location

INIST-CNRS, Cote INIST : 19350, 35400009536039.0070

Nº notice refdoc (ud4) : 1044865



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