Search results for "Inoculum"
showing 10 items of 11 documents
Phytoplankton assemblages in a complex system of interconnected reservoirs: the role of water transport in dispersal
2017
Phytoplankton in a complex network of reservoirs for drinking water supply was sampled in the dry and flood seasons to understand the role of dispersal through hydrochory and of environmental filters in determining the phytoplankton abundance and composition. The main assumptions tested in the present study are that (i) phytoplankton structure in these waterbodies is strongly dependent on the transportation with the river waters flowing through them and (ii) the importance of this stochastic transportation is decreasing as the connectivity with the river decreases allowing environmental filters to shape phytoplankton structure. The multivariate analysis showed that although phytoplankton wa…
Start-up with or without inoculum? Analysis of an SMBR pilot plant.
2010
This study analysed a submerged membrane bioreactor (SMBR) start-up with the purpose of determining the best conditions to carry it out. In order to do this, a hollow fibre membrane module was installed in a submerged configuration in a pilot aerobic reactor. The experiment was then divided in two phases, lasting 65 days each. During phase 1, the pilot plant was started-up without inoculum of activated sludge and no sludge, withdrawal was performed. Conversely, in phase 2, the MBR pilot plant was started-up with sludge inoculum and the sludge concentration was kept constant. In both phases, the volumetric loading rate applied to the pilot plant was kept constant. The authors analysed the di…
Respirometry for the Characterization of Heterotrophic Biomass Activity: Application to a MBR Pilot Plant Operated with Two Different Start-Up Strate…
2016
A membrane bioreactor (MBR) pilot plant was operated in two subsequent experimental periods (namely, Periods I and II) with different start-up and sludge withdrawal strategies to study its peculiar biokinetic behavior by using respirometric techniques. Two extreme operational conditions were chosen to investigate the different biomass activity under dynamic or pseudostationary conditions during and after the start-up phases. Particularly, the MBR pilot plant was operated with the same volumetric loading rate (VLR) and permeate flux but differently managed during the start-up phase. In Period I, the MBR pilot plant was started up without sludge inoculum and operated without sludge withdrawal…
Caracterisation for ancient wheat varieties for their ability to form mycorrhiza and grain quality impact
2014
Wheat (kind Tritucum aestivum, Poaceae family) is a very important cereal ofagronomic interest. Some very ancient varieties are set aside for recent varieties often selected to meet a consumer intensive cultivation of pesticides. Organic farming production system assuming a reduction of synthetic chemical inputs in order to preserve the ecosystem can be defined as a practice where the use of synthetic fertilizers, chemical pesticides and genetically modified organisms is prohibited. This practice is gaining more and more popularity and the amount of land cultivated in this way has increased by 60% between 2000 and 2004. Constraints associated with the production of organic grains include lo…
Impact de l’inoculation au champ par Rhizophagus irregularis DAOM 197198 (AGTIV ®, Premier Tech, Canada) sur le rendement et la nutrition de 4 variét…
2022
Différents services écosystémiques rendus par les champignons mycorhiziens à arbuscules (CMA) ont été mis en évidence dans des expériences menées sur différentes plantes, que ce soit en conditions contrôlées ou au champ. Les CMAs permettent par exemple, dans des conditions adéquates, d’améliorer la production de biomasse ainsi que le rendement, la qualité et les propriétés organoleptiques de nombreux produits d’intérêt pour l’industrie agro-alimentaire. Cependant, peu d’études se sont intéressées à l’impact de l’inoculation d’un CMA possédant une Autorisation de Mise sur le Marché au champ sur le rendement et la qualité des produits agricoles. Nous avons étudié l’impact de l’inoculation par…
Persistence and effectiveness of Rhizophagus irregularis isolate IR27 on the fruit production of jujube trees in a semi-arid field condition
2017
International audience
Caractérisation d'une collection de variétés anciennes de blé pour leur aptitude à former les mycorhizes et impact sur la qualité des graines
2014
Le blé (genre Tritucum aestivum, famille des Poaceae) est une céréale d’intérêt agronomique très important. Certaines variétés très anciennes sont mise de côté pour des variétés plus récentes souvent sélectionnées pour répondre à une culture intensive consommatrice de produits phytosanitaires. L’agriculture biologique, système de production supposant une réduction des intrants chimiques de synthèse afin de préserver l’écosystème, peut se définir comme une pratique où l’emploi d’engrais synthétiques, de pesticides chimiques et d’organismes génétiquement modifiés est prohibé. Cette pratique gagne de plus en plus en popularité et la superficie des terres cultivées de cette manière a crû de 60 …
State of art on mycorrhiza research and inoculum production
2007
International audience
Impact d'une antibiothérapie précoce sur l'efficacité de la marbofloxacine lors d'infection pulmonaire expérimentale à Pasteurella multocida
2011
Nous avons émis l'hypothèse que le traitement précoce d'animaux infectés pourrait se révéler bénéfique en termes de santé animale.
Lignin and Cellulose Content of Fermented Rice Straw with Aspergillus niger (van Tieghem) and Trichoderma mutan AA1
2021
The rice straw has potential to be used as an alternative ruminant feed. However, it has limiting factors i.e low crude protein, high crude fiber, lignin, cellulose, and silica content. To overcome the limiting factors, immersion in a solution of alkaline (lime) or fermentation by using inoculum microbial cellulolytic and lignocellulolytic (Trichoderma mutan AA1 and Aspergillus niger.). The research method was experimental, with four treatments and repeated five times. Completely randomized design was used and if there are differences among treatments a further test with DMRT was carried out (level 1 % and 5 %). These treatments were T0: The rice straw without t fermentation; T1: Fermented …