Pig and poultry production in the Tropics
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CTA. 1986. Pig and poultry production in the Tropics . Spore 6. CTA, Wageningen, The Netherlands.
Permanent link to this item: http://hdl.handle.net/10568/44540
Pig and poultry production in the Tropics book written by Dr. T.R. Preston and published in English and French by CTA in its series on 'Science and Technology for Development'. Copies are available on request from CTA.
Both in industrialised countries as well as is many developing countries, pig and poultry production systems have become very specialised and highly sophisticated. They are extremely efficient at the biological level and demand little labour. In most developing countries, little of the feed required for these agro-industrial production systems is available locally; it must therefore be imported and paid for with scarce reserves of foreign exchange. Furthermore, such systems require high capital investments and generate little employment. In tropical countries there are many locally available feed products which compete only marginally with the production of food crops for human consumption. As a source of carbohydrates, for example, there are the milling residues of locally grown cereals (rice, sorghum, millet, etc.) or imported ones (notably wheat); residues of roots and fruit (cassava, yams, bananas) as well as grasses. For protein-rich feeds, there are: cotton, groundnut and oil-palm seeds, leguminous plant seeds (e.g; Canavalia); leaves of various crops (e.g. cassava and yams); and trees and brush which may or may not come from leguminous species such as Leucaena, Gliricidia, Erythrina and Canavalia among others. There are no biological obstacles to basing pig and poultry production in tropical countries entirely on local resources. Furthermore, such a policy of using local resources would substantially increase productivity per unit of each basic resource (for example, light, soil, water and population). What is required is a policy of 'agricultural production systems' designed to optimize agricultural activity in general, and the use of natural resources in particular, rather than simply maximizing the production of specific crops. All of these considerations are examined in a book written by Dr. T.R. Preston and published in English and French by CTA in its series on 'Science and Technology for Development'. Copies are available on request from CTA.