Aspen Bibliography
Pulp and papermaking residues as feedstuffs for ruminants
Document Type
Article
Journal/Book Title/Conference
Journal of Animal Science
Volume
37
Issue
2
First Page
599
Last Page
607
Publication Date
1973
Abstract
In a search for a more productive outlet for the fibrous residues generated during commercial pulp and paper operations, representative residues were screened for their potential as feedstuffs for ruminants. In vitro rumen digestibilities of many of the residues ranged from 45 to 60%; some attained levels as high as 90%. Analytical data for Klason lignin, total carbohydrate, and ash constituents were also obtained.
Four typical residues—screen rejects from the sulfite pulping of aspen, unbleached parenchyma cell fines from an aspen sulfite tissue mill, unbleached fines from a southern pine kraft mill, and bleached fines from a mixed hardwood southern kraft mill—were obtained in sufficient quantity for feeding trials with goats, sheep, and steers. The residues were blended with other ration ingredients, and pelleted. In vivo digestibilities for the four residues are estimated to be 58, 52, 47 and 78%, respectively, indicative of substantial utilization of the available carbohydrate constituents. A ration containing 77.4% parenchyma cell fines adequately maintained ewes for 2.5 months, and had good acceptability.
Steers were fed rations containing 0 and 50% unbleached southern pine kraft pulp fines ad libitum for 58 days. Average daily gain was 0.77 and 0.54 kg, daily feed intake as a percent of body weight was 2.84 and 2.48, and feed/gain ratio was 9.44 and 11.69 for the 0 and 50% pulp rations, respectively. Rumen pH, ammonia, and volatile fatty acid ranged from 6.4 (0 pulp ration) to 6.6 (65% pulp ration), 17 (65% pulp ration) to 24 mg/100 ml (0 and 20% pulp ration), and 44 (0 and 35% pulp ration) to 83 mm/1 (50% pulp), respectively. Neither these parameters nor microbe populations were different (P< .05) from simultaneously sampled control steers.
Recommended Citation
Millett, M.A.; Baker, A.J.; Satter, L.D.; McGovern, J.N.; and Dinius, D.A., "Pulp and papermaking residues as feedstuffs for ruminants" (1973). Aspen Bibliography. Paper 5305.
https://digitalcommons.usu.edu/aspen_bib/5305