9 results on '"Elfouki, Saïd"'
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2. Carbon storage in agricultural topsoils and subsoils is promoted by including temporary grasslands into the crop rotation
3. Long-term K fertilization effects on soil available K, grain yield, and plant K critical value in winter wheat
4. Legacy effect of green manure crops fertilized with calcium phosphite on maize production and soil properties
5. Critical plant phosphorus for winter wheat assessed from long-term field experiments
6. Valorization of calcium phosphite waste as phosphorus fertilizer: Effects on green manure productivity and soil properties
7. Increasing topsoil and subsoil organic carbon storage with improved rotation in cropland-grassland agroecosystems
8. Recycling phosphorus (P) is crucial to meet future P demand for crop production. We investigated the possibility to use calcium phosphite (Ca-Phi) waste, an industrial by-product, as P fertilizer following the oxidation of phosphite (Phi) to phosphate (Pi) during green manure (GM) cropping in order to target P nutrition of subsequent maize crop. In a greenhouse experiment, four GM crops were fertilized (38 kg P ha−1) with Ca-Phi, triple super phosphate (TSP) or without P (Control) in sandy and clay soils. The harvested GM biomass (containing Phi after Ca-Phi fertilization) was incorporated into the soil before maize sowing. Incorporation of GM residues containing Phi slowed down organic carbon mineralization in clay soil and mass loss of GM residues in sandy soil. Microbial enzymatic activities were affected by Ca-Phi and TSP fertilization at the end of maize crop whereas microbial biomass was similarly influenced by TSP and Ca-Phi in both soils. Compared to Control, Ca-Phi and TSP increased similarly the available P (up to 5 mg P kg−1) in sandy soil, whereas in clay soil available P increased only with Ca-Phi (up to 6 mg P kg−1), indicating that Phi oxidation occurred during GM crops. Accordingly, no Phi was found in maize biomass. However, P fertilization did not enhance aboveground maize productivity and P export, likely because soil available P was not limiting. Overall, our results indicate that Ca-Phi might be used as P source for a subsequent crop since Phi undergoes oxidation during the preliminary GM growth
9. PISTE POUR RECYCLER LE PHOSPHITE DE CALCIUM EN ENGRAIS PHOSPHATÉ.
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