title: [Problems and outlook for production of land animals].
abstract: Some people look at a decreasing demand for animal products in the near future. Today, the diagnosis is that the availability in animal protein are very low in many countries. And we must help to improve the efficiency of animal systems in different parts of the world for cutting out the disparities and preventing the negative effects of the tremendous demographic growth. We worry to observe, during the last decades, a higher development of granivorous species (pigs and poultry) against herbivorous ones (cattle, horses...). For the future, we can take support of the spectacular development in knowledge of all sectors of animal production. But we must keep interest for training generalists in the field of animal sciences, able to make innovations in animal systems. There is a large diversity for conceiving new strategies in animal production. The main limiting factor will be the biomass resources as feeds for producing animal foods: oil meals and other feeds with high protein content seem to be the more strategies because the world production is now 27 kg per capita and the demand in developed countries near 100 kg. Animal systems could be aggressive for environment. Some examples show a dangerous relationship between a higher density of animals, mainly with granivorous fed with imported feedstuffs, and increasing nitrate content in the subterranean water. But the risk can and must be controlled.
authors.affiliation: Institut National Agronomique Paris-Grignon, Bernard.
authors.forename: J
authors.initials: J
authors.lastname: Coleou
mesh_terms: D000822:Animal Husbandry / Q000639:trends*; D004777:Environment; D005523:Food Supply; D011158:Population Growth; D012307:Risk Factors
vernacular_title: Problèmes et perspectives en production animale terrestre.