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The use of animal excreta as feeds for livestock
Published online by Cambridge University Press: 27 February 2018
Extract
The recycling of nutrients from animal excreta has occurred naturally for a very long time. For centuries scavenging pigs and poultry consumed undigested grain from cattle manure. More recently, however, interest in large-scale recycling of animal manures has arisen from a need to reduce the problems of pollution associated with large, intensive livestock units. To date the development of the use of animal excreta as feeds for livestock has been largely confined to those countries in which many thousands of livestock are kept on relatively small areas of land, for example the beef feedlots of the USA.
The trend towards increased size of livestock unit is universal. In England and Wales the number of large livestock holdings increased three-fold in the period 1967 to 1977 (Table 1). There is little doubt that this trend will continue, as farmers strive towards achieving greater economies of scale. In consequence, there is increasing need to develop methods to utilize the manure produced from large livestock units in ways which do not give rise to environmental pollution.
- Type
- Research Article
- Information
- BSAP Occasional Publication , Volume 3: By-Products and Wastes in Animal Feeding , 1980 , pp. 45 - 60
- Copyright
- Copyright © British Society of Animal Production 1980