Insertion des Produits Résiduaires Organiques dans les systèmes de culture : Cas des systèmes céréaliers de la Plaine de Versailles et du Plateau des Alluets

Abstract : Did the recyling of organic residues of a territory on cultivated soils could make possible, at least, partial substitution of nitrogen fertilizers in crop management? This issue was treated in the case of cereal crops in a suburban area characterized by a high diversity of organic residues. The study area is the “Plaine de Versailles and the Plateau Alluets”, located in Ile de France, west of Versailles. The total surface is about 178km2 including 9900ha cultivated by 82 farmers from which 60 cultivate cereals. The animal breeding is scarce in the study area and the most common soils are Cambisols and Luvisols. We tried to develop an approach for analyzing possible substitutions of chemical fertilizers by OWP (organic waste products) use. This approach involves several steps. First an inventory of the entire OWP available or potentially available in the territory has been achieved and all OWP were sampled and characterized: in particular, the availability of N was evaluated using the potential mineralization of the organic nitrogen under controlled conditions in the laboratory (French standard XPU 44-163). Organic residues territory were classified into (i) "organic amendments" (26320 tons of dry matter and 442 tons of total N) characterized by a stabilized organic matter, with significant potential maintenance and increasing levels of soil organic matter and (ii) "organic fertilizers" with a high availability of N (5686 tons of dry matter and 361 tons of total N) . Among the identified OWP, sludge from sewage treatment (dried and limed), and a commercial product corresponding to dried pig slurry from Britain and poultry manure are OWP with the most interesting fertilizing values. Organic amendments with high stabilized organic matter value were also identified, including composted or not horse manure, and green waste compost. Last and final summary in the thesis.
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Submitted on : Tuesday, September 23, 2014 - 5:47:50 PM
Last modification on : Wednesday, September 18, 2019 - 8:48:53 AM
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Ahmed Karim Dhaouadi. Insertion des Produits Résiduaires Organiques dans les systèmes de culture : Cas des systèmes céréaliers de la Plaine de Versailles et du Plateau des Alluets. Sciences agricoles. AgroParisTech, 2014. Français. ⟨NNT : 2014AGPT0014⟩. ⟨pastel-01067665⟩

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