E de la Garza Institute for Goat Research Langston University
Workshops & Field Day Newsletter Newsletter Subscription Demonstrations Demonstrations Langston University Research Building
Goat Menu
 

extension
extension
research
other
library
quiz
search
about
contact
faculty

bar

 

Methane emission by goats consuming diets with different levels of condensed tannin-containing lespedeza and sorghum-sudangrass

G. Animut, R. Puchala, A.L. Goetsch, T. Sahlu, G. Detweiler, A. K. Patra, V. H. Varel, and J. Wells

Journal of Animal Science 84(Supplement 1):26. 2006

Twenty-four yearling Boer Spanish wethers (7/8 Boer; initial BW of 34.1 1.02) were used to determine effects of dietary levels of a condensed tannin (CT)-containing forage Kobe lespedeza (Lespedeza striata; K) and sorghum-sudangrass (Sorghum bicolor; G) on methane emission. Treatments were dietary K levels (DM basis) of 100, 67, 33, and 0% (100K, 67K, 33K, and 0K, respectively). Forages harvested daily were fed at 1.3 times the maintenance energy requirement. The experiment lasted 21 d, with measures on the last 8 d. N was 1.7 and 2.2%, in vitro true DM digestibility was 85.5 and 68.0%, and CT was 0 and 15.1% for G and K, respectively. DMI was similar among treatments (677, 664, 633, and 626 g/d; SE = 30.8) and gross energy (GE) digestibility increased linearly (P < 0.05) with decreasing K (47.1, 51.4, 58.9, and 65.6% for 100K, 67K, 33K, and 0K, respectively). ME intake increased linearly (P < 0.05; 398, 431, 485, and 513 kJ/kg BW0.75) and energy expenditure (356, 350, 399, and 504 kJ/kg BW0.75) and methane emission changed linearly and quadratically (P < 0.05) with decreasing K (10.9, 13.8, 17.6, and 26.2 l/d; 3.3, 4.0, 5.4, and 8.2% GE; 7.0, 7.7, 8.8, and 11.9% DE for 100K, 67K, 33K, and 0K, respectively). In vitro methane production by incubation of ruminal fluid for 3 wk with a medium for methanogenic bacteria and other conditions promoting activity by methanogens also was affected linearly and quadratically (P < 0.05) by K (7.0, 8.1, 9.2, and 16.1 ml for 100K, 67K, 33K, and 0K, respectively). The total bacterial count was similar among K levels, but the number of total protozoa increased linearly (P < 0.05) and changed quadratically (P < 0.07) as K declined (8.3, 11.8, 15.6, and 27.1 x 105/ml for 100K, 67K, 33K, and 0K, respectively). In conclusion, the CT-containing forage K decreased methane emission by goats regardless of nonzero level without deleterious effects on digestibility. The impact of K CT on methane emission appears attributable to changes in methanogenic bacterial activity, although alterations of protozoal actions might be involved as well.


 

Extension Activities   |   Research Activities   |   Other Activities
Library Activities   |   Quiz   |   Search   |   About Us   |   Contact Us   |   Faculty & Staff
Research Extension Home   |   Top of Page

Copyright© 2000 Langston University   • Agricultural Research and Extension Programs
P.O. Box 730  • Langston, OK  73050 • Phone 405.466.3836