1. Species, climate and fertilizer effects on grass fibre and protein in tropical environments
- Author
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H. Tran, Philippe Lecomte, and P. Salgado
- Subjects
Pennisetum clandestinum ,Facteur climatique ,Human fertilization ,biology ,Teneur en protéines ,food and beverages ,F70 - Taxonomie végétale et phytogéographie ,Facteur du milieu ,technique de prévision ,Métrologie ,Chloris gayana ,Dactylis glomerata ,Fertilizer ,Zone tropicale ,P40 - Météorologie et climatologie ,F60 - Physiologie et biochimie végétale ,Spectroscopie infrarouge ,Testage non destructif ,macromolecular substances ,engineering.material ,Fertilisation ,Animal science ,Lolium multiflorum ,Botany ,Aliment du bétail ,Genetics ,Temperate climate ,Poaceae ,Plante fourragère ,Croissance ,Technique analytique ,L02 - Alimentation animale ,Graminée ,Fibre végétale ,biology.organism_classification ,Choix des espèces ,engineering ,Animal Science and Zoology ,U30 - Méthodes de recherche ,Fibre brute ,Agronomy and Crop Science ,F04 - Fertilisation - Abstract
SUMMARYA 3-year experiment (2005–07) was conducted on Reunion Island (France) to evaluate the effect of species, climate and fertilization levels on fibre and protein fractions of tropical (C4;Chloris gayanaandPennisetum clandestinum) and temperate (C3;Dactylis glomerataandLotium multiflorum) grasses. A near infrared reflectance spectroscopy (NIRS) prediction referential was developed to estimate neutral detergent fibre (NDF), acid detergent fibre (ADF), crude protein (CP), NDF insoluble protein (NDF-IP) and ADF insoluble protein (ADF-IP). The NIRS equations were then used to screen many regrowth grass samples collected at heading stage continuously for 3 years to evaluate their changes during the seasons. Results showed that grass species differed significantly in fibre and protein fractions. NDF, ADF and ADF-IP were the lowest inD. glomerata/L. multiflorumand the highest inC. gayana. The wet season was associated with higher NDF, ADF and NDF-IP inD. glomerata/L. multiflorumand lower NDF-IP inP. clandestinum.Fertilization increased the CP inC. gayanaand the NDF-IP inP. clandestinum, but decreased the ADF-IP of bothC. gayanaandD. glomerata/L. multiflorum. Growth rate strongly changed NDF, ADF, NDF-IP and ADF-IP although no change in CP appeared. In general, NDF, ADF and NDF-IP increased with the growth rate. In contrast, the ADF-IP content decreased from slow to fast growth rate inC. gayanaandD. glomerata/L. multiflorum. Growth rate changes were thus considered as a general indicator for fibre and protein fraction variations of these grasses.
- Published
- 2009