Hostname: page-component-78c5997874-t5tsf Total loading time: 0 Render date: 2024-11-02T12:21:43.169Z Has data issue: false hasContentIssue false
  • English
  • Français

Feeding value for finishing pigs of silage effluent with a high initial pH

Published online by Cambridge University Press:  27 March 2009

D. C. Patterson
D. C. Patterson
Affiliation:
Agricultural Research Institute of Northern Ireland, Hillsborough, Co. Down BT26 6DR, UK
Get access Rights & Permissions [Opens in a new window]

Summary

Silage effluents with pH values of 4·1, 4·7 and 5·1 (normal (N), high (H) and very high (VH), respectively) were treated with hydrochloric acid to bring the pH of each effluent to 40. The effluents were offered to finishing pigs in a randomized block experiment (November 1983 to February 1984 at the Agricultural Research Institute of Northern Ireland) with dietary treatments which comprised a control diet in which meal was given to a standard scale of feeding, or effluent diets N, H and VH, in which the effluent was substituted on a dry matter basis for 150g/kg of the standard scale of feeding. In a negative control diet, meal was offered at 850 g/kg of the control diet. Water or effluent as appropriate was given on the meal, and water was also available ad libitum. A total of 60 pigs was used with mean initial and final live weights (LW) of 37·1 and 86·4 kg, respectively.

Effluents H and VH had higher ammonia N: total N and lower amino acid N: total N and lactic acid contents than effluent N. The rates of LW gain, feed conversion ratios, backfat thicknesses and the proportions of lean and fat in the ham joint were similar for the control diet and effluent diets N and H, indicating a similar nutritive value for all three. Effluent diet VH gave a significantly (P < 0·01) reduced rate of LW gain and poorer feed conversion ratio than diets N and H. While diet VH was consumed reluctantly with widespread refusals (mean refusal 28 g DM/kg DM offered), the feed refusals together with the lower lysine and threonine contents of the effluent would not have produced the observed degree of deterioration in growth and feed conversion. Possible reasons for the lower nutritive value are undetectable wastage of feed or the presence of an antinutritional factor in effluent VHG, or a combination of both factors.

Type
Animals
Information
The Journal of Agricultural Science , Volume 115 , Issue 1 , August 1990 , pp. 129 - 133
Copyright
Copyright © Cambridge University Press 1990

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

REFERENCES

Agricultural Research Council (1981). The Nutrient Requirements of Pigs. Slough: Commonwealth Agricultural Bureaux.Google Scholar
Banwart, W. L., Tabatai, M. A. & Bremner, J. M. (1972). Determination of ammonia in soil extracts and water samples by an ammonia electrode. Communications in Soil Science and Plant Analysis 72, 449–458.CrossRefGoogle Scholar
Dewar, W. A. & McDonald, P. (1961). Determination of dry matter in silage by distillation with toluene. Journal of the Science of Food and Agriculture 11, 790–795.CrossRefGoogle Scholar
Elsden, S. R. & Gibson, G. H. (1954). The estimation of lactic acid using ceric sulphate. Biochemical Journal 58, 154–158.CrossRefGoogle ScholarPubMed
Jones, D. W. & Kay, J. J. (1976). Determination of volatile fatty acids C1–C6 and lactic acid in silage juice. Journal of the Science of Food and Agriculture 27, 1005–1014.CrossRefGoogle ScholarPubMed
Ministry Of Agriculture, Fisheries & Food (1981). The Analysis of Agricultural Materials. Maff Publication RB 427. London: HMSO.Google Scholar
Patterson, D. C. (1983). Silage Effluent for Feeding Pigs. Agricultural Research Institute of Northern Ireland, Occasional Publication No. 8, 33 pp.Google Scholar
Patterson, D. C. & Kilpatrick, D. J. (1990). Effect of amount of effluent from grass silage in the diet of finishing pigs. Journal of Agricultural Science, CambridgeGoogle Scholar
Patterson, D. C. & Walker, N. (1979 a). The use of effluent from grass silage in the diet of finishing pigs. 1. Variation in composition of effluents. Animal Feed Science and Technology 4, 263–274.CrossRefGoogle Scholar
Patterson, D. C. & Walker, N. (1979 b). The use of effluent from grass silage in the diet of finishing pigs. II. Assessment of nutritive value of fresh and stored effluent. Animal Feed Science and Technology 4, 275–293.CrossRefGoogle Scholar
Patterson, D. C. & Walker, N. (1981). Preservation of silage effluent. Journal of the Science of Food and Agriculture 32, 957–964.CrossRefGoogle Scholar