Literatura científica selecionada sobre o tema "Engrais minéraux phosphatés"
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Artigos de revistas sobre o assunto "Engrais minéraux phosphatés"
Sinsi, Raymond Lumbuenamo, Elie Nsimba Ngembo, Eric Lutete Landu, Joël Tungi Tungi e Blandine Nsombo Mosombo. "Caractérisation de la cinétique des échanges isotopiques du phosphore et potentialités des roches naturelles phosphatées de la République Démocratique du Congo dans la fertilisation phosphorique des sols ferrallitiques". Revue Africaine d’Environnement et d’Agriculture 6, n.º 4 (9 de janeiro de 2024): 32–42. http://dx.doi.org/10.4314/rafea.v6i4.4.
Texto completo da fonteSanon, Abdramane, Alain P. K. Gomgnimbou, Hamadé Sigue, Kalifa Coulibaly, Cheick A. Bambara, Willifried Sanou, Sékou Fofana e Hassan B. Nacro. "Performances économiques et financières de la fertilisation en riziculture pluviale stricte dans la zone sud soudanienne du Burkina Faso". International Journal of Biological and Chemical Sciences 15, n.º 4 (19 de novembro de 2021): 1581–94. http://dx.doi.org/10.4314/ijbcs.v15i4.22.
Texto completo da fonteBentchikou, Mohamed. "Appréciation de l'alimentation minérale du vignoble d'appellation garantie (V.A.O.G.) de Mascara (Algérie)". OENO One 21, n.º 1 (31 de março de 1987): 13. http://dx.doi.org/10.20870/oeno-one.1987.21.1.1269.
Texto completo da fonteTeses / dissertações sobre o assunto "Engrais minéraux phosphatés"
Magallón-Servin, Paola, e Paola Magallón-Servin. "Development of an inoculant of phosphate rock-solubilizing bacteria to improve maize growth and nutrition". Doctoral thesis, Université Laval, 2014. http://hdl.handle.net/20.500.11794/24965.
Texto completo da fonteL'utilisation directe de roche phosphatée (RP) est une alternative viable pour remplacer les coûteux fertilisants chimiques dans les pays en voie de développement. L'utilisation de bactéries solubilisatrices de RP (BSRP) est un bon moyen pour augmenter la réactivité de la RP. L'objectif principal de ce travail a été d'obtenir des isolats provenant de la mycorhizosphère du maïs possédant une grande capacité de solubilisation de RP, compatibles avec la mycorhize arbusculaire (MA) et présentant des traits associés aux rhizobactéries favorisant la croissance de plantes (RFCP) pour le développement d'un inoculant bactérien pour le maïs.À partir de 118 isolats obtenus de maïs biologique cultivé au Québec, huit BSRP ont été identifiés comme Asaia lannaensis Vb1, Pseudomonas sp. Vr14, Rahnella aquatilis (Vr7, Vr13 et Sr24) et Pantoea agglomerans (Vr9, Ve16 et Vr25). En milieu liquide, les isolats ont dissous le P des RP selon leur réactivité (Gafsa> Tilemsi> Maroc). La solubilisation des RP s'est effectuée par la production d'acides organiques (OA) et l'abaissement du pH. Les meilleures BSRP de chaque groupe: (A. lannaensis Vb1, Pseudomonas sp. Vr14, R. aquatilis Sr24 et P. agglomerans Vr25) ont été sélectionnées selon leur capacité élevée de solubilisation de la RP et de leur production d'acide indolacétique (AIA) et de sidérophores. L’importance des biofilms formés, ainsi que le degré de motilité variaient selon les isolats et tous étaient compatibles avec le Glomus irregulare (Gi). L’étude de la colonisation des racines montre que R. aquatilis Sr24 et P. agglomerans Vr25 ont été les meilleurs colonisateurs. Lors des expériences en serre, certains mélanges contenant R. aquatilis Sr24, P. agglomerans Vr25 et Gi, ont amélioré la biomasse, l'absorption des nutriments et la colonisation de la plante en association avec un champignon mycorhizien indigène du maïs cultivé dans un sol non stérile et fertilisé avec la RP Marocaine. Nous attribuons ces résultats à leur capacité d'être de bonnes BSRP colonisatrices des racines. Elles sont aussi compatibles avec Gi et sont capables de produire de l'AIA et des sidérophores. Cette thèse démontre donc le potentiel d'utilisation de BSRP comme inoculant afin d'améliorer l'efficacité de l'utilisation directe de RP comme fertilisant phosphaté pour l'agriculture durable du maïs.
Phosphorous is the second most important nutrient for plant growth, but its availability is often reduced. Therefore high quantities of expensive soluble P-fertilizers are added to soil. Direct use of phosphate rock (PR) is an alternative to chemical P-fertilizers in developing countries and for sustainable agriculture. In order to increase PR reactivity the use of phosphate rock-solubilizing bacteria (PRSB) is a good alternative. Therefore, the main objective of this work was to obtain mycorrhizosphere-competent PRSB presenting other PGPR-associated traits to be used for the development of an inoculant to improve maize growth and P nutrition. Out of 118 isolates obtained from organically grown maize in Quebec, eight PRSB were identified as Asaia lannaensis Vb1, Pseudomonas sp. Vr14, Rahnella aquatilis (Vr7, Vr13 and Sr24) and Pantoea agglomerans (Vr9, Ve16 and Vr25). All isolates were able to mobilize P from different sparingly soluble P sources in solid media. In liquid medium the isolates were able to solubilize P from PRs according to their reactivity (Gafsa> Tilemsi> Morocco). PRs were solubilized by the production of organic acids (OAs) and by lowering the pH. The best PRSB from each group (A. lannaensis Vb1, Pseudomonas sp. Vr14, R. aquatilis Sr24 and P.3 agglomerans Vr25) were selected based on their high PR solubilization, and capacity for indolacetic acid (IAA) and siderophore production. These four isolates presented different biofilm formation and motility capacities and were compatible with Glomus irregulare (Gi). A root colonization study showed that R. aquatilis Sr24 and P. agglomerans Vr25 were the best root colonizers. Vr25 was very competitive when used with other PRSB. In greenhouse trials, plant inoculation with R. aquatilis Sr24 and P. agglomerans Vr25 in addition to Gi, increased the biomass, nutrient uptake in non-sterile soil amended with Moroccan PR (MPR). We attribute these results not only to their PR-solubilizing capacity but also for their ability to be good PRSB, competitive root colonizers, compatible with Gi and to produce IAA and siderophores. This thesis shows that PRSB with AM fungi can be used as inoculants to improve the efficiency of the direct use of PR as P fertilizer for sustainable maize production.
Phosphorous is the second most important nutrient for plant growth, but its availability is often reduced. Therefore high quantities of expensive soluble P-fertilizers are added to soil. Direct use of phosphate rock (PR) is an alternative to chemical P-fertilizers in developing countries and for sustainable agriculture. In order to increase PR reactivity the use of phosphate rock-solubilizing bacteria (PRSB) is a good alternative. Therefore, the main objective of this work was to obtain mycorrhizosphere-competent PRSB presenting other PGPR-associated traits to be used for the development of an inoculant to improve maize growth and P nutrition. Out of 118 isolates obtained from organically grown maize in Quebec, eight PRSB were identified as Asaia lannaensis Vb1, Pseudomonas sp. Vr14, Rahnella aquatilis (Vr7, Vr13 and Sr24) and Pantoea agglomerans (Vr9, Ve16 and Vr25). All isolates were able to mobilize P from different sparingly soluble P sources in solid media. In liquid medium the isolates were able to solubilize P from PRs according to their reactivity (Gafsa> Tilemsi> Morocco). PRs were solubilized by the production of organic acids (OAs) and by lowering the pH. The best PRSB from each group (A. lannaensis Vb1, Pseudomonas sp. Vr14, R. aquatilis Sr24 and P.3 agglomerans Vr25) were selected based on their high PR solubilization, and capacity for indolacetic acid (IAA) and siderophore production. These four isolates presented different biofilm formation and motility capacities and were compatible with Glomus irregulare (Gi). A root colonization study showed that R. aquatilis Sr24 and P. agglomerans Vr25 were the best root colonizers. Vr25 was very competitive when used with other PRSB. In greenhouse trials, plant inoculation with R. aquatilis Sr24 and P. agglomerans Vr25 in addition to Gi, increased the biomass, nutrient uptake in non-sterile soil amended with Moroccan PR (MPR). We attribute these results not only to their PR-solubilizing capacity but also for their ability to be good PRSB, competitive root colonizers, compatible with Gi and to produce IAA and siderophores. This thesis shows that PRSB with AM fungi can be used as inoculants to improve the efficiency of the direct use of PR as P fertilizer for sustainable maize production.
Demay, Joséphine. "La disponibilité en phosphore des sols pourrait-elle limiter la production de l’agriculture biologique dans un contexte de forte expansion ?" Electronic Thesis or Diss., Bordeaux, 2024. http://www.theses.fr/2024BORD0059.
Texto completo da fonteFaced with the current environmental and climate crises, food production systems urgently need to transform. Among possible alternatives, organic agriculture is often put forward. Yet, it is still under debate whether large scale expansion of organic farming would be limited by nutrient availability. So far, studies have shown that provided a strong redesign of food systems including a reduction in livestock densities and food waste, changes in diets and re-location of crops and livestock, the global food demand could be met by converting up to 60% of cropland areas to organic agriculture. Above this threshold, nitrogen (N) limitations would lead to an unsatisfied demand. However, these studies have not considered whether soil available phosphorus (P) could limit organic food production in the long run. This question arises because mineral P fertilizers, which currently contribute to more than half of global soil P inputs to cropland soils, are banned under organic farming. Filling this knowledge gap is of utmost importance not only to assess the ability of organic farming to expand globally but also in the context of the slow and inevitable depletion of phosphate rock reserves. In this thesis, we first quantified the reliance of current agricultural soil P fertility on past and current use of mineral P fertilisers. We then analysed the extent to which organic food production would be affected by the potential soil P deficits in a hypothetical 100% organic world. Finally, we quantified the N and P fertility transfers between grassland and cropland soils in order to assess their contribution to the total nutrient inputs to cropland soils. To simulate a 100% organic world, we coupled two already published models: the GOANIM model and the GPASOIL model and ran them for 100 years at a spatially explicit resolution. Overall, we show that the current P fertility of agricultural soils is highly reliant on the cumulated use of mineral P fertilizers over the 1950-2017 period, half of the global soil agricultural available P being of anthropic origin. This global pattern hides great discrepancies between countries, reflecting contrasting historical uses of mineral P fertilizers and contrasting soil biogeochemical backgrounds. The strong reliance on mineral P inputs is both an opportunity and an obstacle to the development of organic farming. On the one hand, heavy dependence on mineral P fertilizers often results in large inherited soil P stocks, making it easier to switch to organic farming. However, this reliance questions the long-term sustainability of farming systems without any mineral P inputs. Our simulations of a 100% organic world revealed that while crop production would be strongly limited by N in the short term, long term P limitations would also strongly affect food production, especially in places with initial low level of P fertility, high levels of production and a high share of N-fixing crop in rotations. After 100 years of farming the world organically, global food production would be reduced by 41%, with global cropland and grassland soil P deficit contributing to 39% and 18% of that loss respectively. We also show that under organic farming, fertility transfers from grassland to cropland soils contribute to 13% and 37% of total N and P inputs to cropland soils respectively, making cropland production levels reliant on the fertility of grassland systems. Overall, our work provides novel knowledge on the potential limitations of organic production by agricultural soil available P, highlighting long term risks for food security in a 100% organic world. Finally, we discuss various options for limiting this global soil P deficit, which include better connected livestock and crop production systems to enhance fertility transfers, closing the P cycle by limiting soil erosion and by better recycling of household organic waste and human excreta back to agricultural soils
Abdi, Dalel. "Évolution des indicateurs de fertilité et de risque environnemental liés au P dans les sols minéraux et organiques du Québec soumis à la fertilisation phosphatée". Thesis, Université Laval, 2010. http://www.theses.ulaval.ca/2010/27135/27135.pdf.
Texto completo da fonteBabana, Amadou Hamadoun. "Mise au point d'un inoculant biologique pour le blé irrigué du Mali". Thesis, Université Laval, 2003. http://www.theses.ulaval.ca/2003/21179/21179.pdf.
Texto completo da fonteBecause of the high price of imported P-fertilizers in Mali, the Tilemsi rock phosphate (TRP) is a cheaper locally available P source alternative for farmers. In many areas regardless of its good physical and chemical characteristics, crops and particularly wheat showed very slow response to TRP. With the broad aim of biologically improving P uptake by wheat, in this work we describe the use of TRP solubilizing microorganisms in field inoculation trials. In 3 different Malian wheat cultivars, 4 to 12% of the rhizosphere microorganisms were able to dissolve TRP. Six bacterial and two fungal isolates were selected for their high P-solubilizing activity in solid and liquid media, and were tested in a field in Koygour (Diré) in 2000-2001. Two fungal isolates Aspergillus niger (C1) and Penicillium chrysogenum (C13) and Pseudomonas sp. (BR2) significantly increased plant heights after 60 days, and the fresh and dry matter yields and P-uptake after 90 days of growth. Field assays were performed in Koygour (Diré) in 2001-2002. Inoculation treatments included C1, C13, BR2, C1+BR2, C13BR2, and a control in the presence or absence of the AM fungus Glomus intraradices. P treatments included Tilemsi rock phosphate (TRP), phosphate biammoniacal (DAP) and an unfertilized control. The colonization of wheat root with AM was significantly higher following inoculation with G. intraradices, and when TRP was the P source used. The presence of Pseudomonas strain (BR2) improved root colonization by the AM fungus. In general, straw and grain yield improved significantly following inoculation with AM and phosphate solubilizing microorganisms. The highest P concentration in wheat grain and straw was recorded in treatment including a combinaison of AM, BR2 and C1 in the presence of TRP.
Brault, Marie-Esther. "Efficacité agro-environnementale d'un engrais organo-minéral à base de lisier de porc bio-traité". Thesis, Université Laval, 2007. http://www.theses.ulaval.ca/2007/24355/24355.pdf.
Texto completo da fonte