0.857
IF5
0.900
IF
Q3
JCR
0.92
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20
MNiSW
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ICV
ORIGINAL PAPER
 
CC-BY 4.0
 
 

The chemical composition and ruminal degradation of the protein and fibre of tetraploid Robinia pseudoacacia harvested at different growth stages

G. J. Zhang 1, 2,  
Y. Li 1  ,  
Z. H. Xu 1,  
J. Z. Jiang 1, 3,  
F. B. Han 4,  
 
1
National Engineering Laboratory for Tree Breeding, College of Biological Sciences and Biotechnology, Beijing Forestry University, 100083 Beijing, P.R. China
2
College of Horticulture Science and Technology, Hebei Normal University of Science & Technology, 066600 Qinhuangdao, P.R. China
3
Department of Chemistry, Guizhou Normal College, 550018 Guiyang, P.R. China
4
Forestry Bureau of Xianghe County, 065400 Langfang, P.R. China
J. Anim. Feed Sci. 2012;21(1):177–187
Publish date: 2012-03-15
KEYWORDS:
ABSTRACT:
Samples of leaves, stems and whole plant of tetraploid Robinia pseudoacacia harvested at four different growth stages (first rapid growth, slow growth, second rapid growth, and leaf-colour changing) were analysed for chemical composition and in situ disappearance of protein and fibre using the nylon bag technique. The crude protein content was the highest in leaves, followed by whole plant, and the lowest in stems, while the opposite trend was found for dry matter, NDF, and ADF. Moreover, the crude protein content of the three plant parts decreased during maturation. Effective degradability of crude protein was higher for stems (519.0 g kg-1) than for whole plant (353.6 g kg-1) and leaves (270.4 g kg-1). Effective degradability of ADF was significantly higher in leaves than in the whole plant and stems. Ruminal disappearance of nutrients in the three plant parts was higher during the first rapid growth stage than at later stages.
CORRESPONDING AUTHOR:
Y. Li   
National Engineering Laboratory for Tree Breeding, College of Biological Sciences and Biotechnology, Beijing Forestry University, 100083 Beijing, P.R. China
ISSN:1230-1388