Catalogo Articoli (Spogli Riviste)

OPAC HELP

Titolo:
Change in mechanical properties of wheat straw due to decomposition and moisture
Autore:
Annoussamy, M; Richard, G; Recous, S; Guerif, J;
Indirizzi:
INRA, Unite Agron Laon Peronne, F-02007 Laon, France INRA Laon France F-02007 Unite Agron Laon Peronne, F-02007 Laon, France
Titolo Testata:
APPLIED ENGINEERING IN AGRICULTURE
fascicolo: 6, volume: 16, anno: 2000,
pagine: 657 - 664
SICI:
0883-8542(200011)16:6<657:CIMPOW>2.0.ZU;2-J
Fonte:
ISI
Lingua:
ENG
Soggetto:
TRITICUM-AESTIVUM L; STRENGTH; CULTIVARS; STEM;
Keywords:
internode; wheat; shearing; bending; force; stress; Young's modulus; moisture; biochemical composition;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Agriculture,Biology & Environmental Sciences
Citazioni:
35
Recensione:
Indirizzi per estratti:
Indirizzo: Richard, G INRA, Unite Agron Laon Peronne, Rue Fernand Christ, F-02007 Laon, France INRA Rue Fernand Christ Laon France F-02007 02007 Laon, France
Citazione:
M. Annoussamy et al., "Change in mechanical properties of wheat straw due to decomposition and moisture", APPL ENG AG, 16(6), 2000, pp. 657-664

Abstract

The mechanical properties of straw residues from cereal crops left on the soil surface are affected by the decomposition rate and moisture during theinter-cropping period. We have examined the relationship between the physical characteristics and mechanical properties of mature wheat straw as a function of decomposition and moisture. The mechanical properties were determined by shearing and bending tests. The ear internode had the lowest mass per unit length and the highest density because of its smaller diameter and stem wall thickness. The difference in maximum force and energy required for failures between internodes is due to their mass per unit length and cross-sectional area. The higher Young's modulus and maximum bending stress of the ear internode could be due to its higher proportion of hemicelluloses. Bending strength decreased by 70% and shear strength by 80% with decomposition due to the loss of mas and a change in biochemical composition (mainly loss of cellulose). Straw moisture had opposite effects on bending and shearing: the maximum bending stress decreased by 54% and the shear stress increased by 83%. As both decomposition and moisture greatly modify the mechanical properties of straw, these two factors should be taken into account in the management of straw after harvest.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 27/11/20 alle ore 13:53:50