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Academic literature on the topic 'Fraises – Irrigation'
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Journal articles on the topic "Fraises – Irrigation"
Bayabil, Haimanote, Kati W. Migliaccio, Jose J. H. Debastiani Andreis, Clyde W. Fraisse, Kelly T. Morgan, and George Vellidis. "Smartirrigation Apps: Urban Turf." EDIS 2019, no. 6 (December 20, 2019): 7. http://dx.doi.org/10.32473/edis-ae499-2019.
Full textBeeson, R. C. "Root Growth and Water Status of Container-grown Photinia ×fraiseri Dress Transplanted into a Landscape." HortScience 29, no. 11 (November 1994): 1295–97. http://dx.doi.org/10.21273/hortsci.29.11.1295.
Full textVermeer, Eduard. "The Rise and Fall of a Man-Made Lake: Training Lake in Jiangnan, China, 300-2000 A.D." Journal of the Economic and Social History of the Orient 51, no. 2 (2008): 209–51. http://dx.doi.org/10.1163/156852008x307438.
Full textMigliaccio, Kati W., J. H. Debastiani Andreis, Clyde Fraisse, Kelly T. Morgan, and G. Vellidis. "Smartirrigation Apps: Urban Turf." EDIS 2013, no. 9 (October 31, 2013). http://dx.doi.org/10.32473/edis-ae499-2013.
Full textDissertations / Theses on the topic "Fraises – Irrigation"
Sauvageau, Guillaume. "Pratiques d'irrigation et lessivage en production de fraises en Californie." Master's thesis, Université Laval, 2020. http://hdl.handle.net/20.500.11794/40133.
Full textCalifornia is the largest strawberry producing region in North America and this productionwould not be possible without irrigation. However, water resources are limited in thisregion and the water quality has become an issue in some growing areas due to nitrateleaching. Therefore, it appears essential to optimize the irrigation management to savewater and to limit the leaching of nutrients without decreasing fruit productivity. Previousworks have shown that maximum yield is obtained under wet irrigation managementconditions (i.e. irrigation being initiated when a soil matric potential threshold of -10 kPawas exceeded), but the water use efficiency (WUE) is not maximized. WUE could beimproved by using drier thresholds when the water need of the plant is lower.The first chapter aimed to compare different deficit irrigation strategies to wet managementand to conventional grower management. Significant increases in WUE were obtainedusing deficit irrigation compared to wet management (-10 kPa) without any significantimpact on fruit yield. However, deficit irrigation tended to decrease fruit yield by 0 to 3 %and given the high value of the strawberry product, it would be relevant to verify whetherthis trend of yield loss is confirmed. Moreover, using a predetermined soil water potentialthreshold to manage irrigation more efficiently could reduce the water leaching comparedwith conventional grower management as this technology allows a finer adjustment ofirrigation period and therefore limits the loss of water and nutrients beyond the root zone.The second chapter aimed to measure the impact of different irrigation strategies on soilsalinity and to determine whether the electrical conductivity (EC) of the soil solution was anappropriate indicator to follow the concentration of nitrates in the soil. Different irrigationmanagements based on soil water potential were compared with irrigation managementbased on evapotranspiration (ET) and with conventional grower management. Nosignificant difference was observed among treatments on both sites, as all five irrigationstrategies resulted in a salinity build-up over the season, but winter rainfalls were sufficientto leach the salt accumulation from the root zone. Thus, tension-based deficit irrigationmanagement does not represent a risk of increasing the soil salinity. Furthermore, the ECof the soil turned out to be inadequate to assess the nitrate concentration in the soil sincethis ion did not have a great impact on the soil salinity compared with other ions naturallypresent in the soils investigated.
Bergeron, Daniel. "Régie de l'irrigation goutte à goutte dans la production de fraises à jours neutres au Québec." Thesis, Université Laval, 2010. http://www.theses.ulaval.ca/2010/27505/27505.pdf.
Full textPrémont, Valérie. "Irrigation, substrats et fertilisation dans la culture hors-sol du fraisier, des enjeux pour une production optimisée." Master's thesis, Université Laval, 2015. http://hdl.handle.net/20.500.11794/25889.
Full textIntroduced from Europe, the soilless culture of strawberry only begins in Canada and its parameters must be adapted to regional conditions. The objectives of this study were to find the best suited local substrates for this culture, to determine the appropriate irrigation management and to define the fertilizer concentration effects on the crop. After three experiments, it turned out that the coconut fiber and aged bark substrates obtain similar yields and peat-sawdust mixtures have plant establishment issues, especially when the proportion of sawdust is important. However, the peat-sawdust substrate with a low proportion of sawdust (volume/volume) reaches yields equivalent to coconut and bark substrates when implantation is successful. The latter is facilitated for all the substrates by a wetter irrigation management. Finally, the Europe recommended fertilization is appropriate to regional conditions, as a higher dose does not increase the yields and generates only higher costs related to fertilizers.
Gendron, Laurence. "Irrigation de précision : un choix économique? : analyse de la pertinence de gérer les irrigations à l'aide de tensiomètres dans la culture de la fraise au Québec et en Californie." Master's thesis, Université Laval, 2017. http://hdl.handle.net/20.500.11794/27517.
Full textThe analysis of the economic relevance of precision irrigation for field-grown strawberries in Quebec and California takes place in a context of increased water scarcity worldwide and global population growth. There is a critical need to improve irrigation practices in order to make a rational use of water. In this study, the irrigation management based on soil matric potential (or tension) was first compared to the conventional practice in strawberry cultivation in California and the profitability of the tension-based method was calculated. The economic relevance of deficit irrigation was also evaluated. As a second step, an analysis comparing a tension-based pulsed irrigation with the equivalent non-pulsed irrigation procedure was conducted to determine if pulsed water applications generated enough additional benefits to cover the cost of the investment in an automatic irrigation system in Quebec. The results of the first study revealed that irrigation management based on tension was highly cost-effective in addition to being a water saving approach relative to the conventional practice, whatever the location in California. The results also demonstrated that any amount of water saved by a deficit irrigation strategy was costly for strawberry growers. The results of the second study revealed that pulsed irrigation generated more benefits than non-pulsed irrigation in a highly permeable soil, and that the additional benefits were high enough to offset the cost of an automatic irrigation system.
Létourneau, Guillaume. "Approche multicritère d'optimisation de l'irrigation goutte-à-goutte du fraisier." Doctoral thesis, Université Laval, 2017. http://hdl.handle.net/20.500.11794/33286.
Full textBecause of the growing competition for limited water resources between the domestic, industrial, commercial and agricultural sectors, the development of water-efficient irrigation practices is very important. Day-neutral strawberry is considered a crop with high water and fertilizers requirements. This culture is mainly irrigated with sub-surface drip irrigation systems for which irrigation management requires a high skill level and a constant attention. Otherwise, the risks of productivity losses and deep percolation of water are substantial. The objective of this study is the determination of optimal drip-irrigation system configuration and management parameters for strawberry production through experimental and numerical modelling approaches. The first part of this study describes production-scale experiments conducted at sites with contrasting cropping systems, climatic conditions and soil types. The main objective was the determination of optimal matric potential-based irrigation initiation thresholds with respect to crop productivity and water use efficiency. Randomized complete blok experiments were conducted at four sites. Two sites, (one silty-clay loam and one clay loam) were in the Province of Québec, Canada and two (one sandy loam and one clay loam) in California, USA. For the first sites, the effects on yield and water use efficiency of the irrigation thresholds were limited but matric potential-based management resulted in a reduction of deep percolation. For the Californian sites, the results showed that a threshold in the -15 to -10 kPa range lead to significant increases in crop yield and water use efficiency. Altogether, it was shown that an irrigation initiation threshold of -10 kPa was a suitable value for most soils and climatic conditions. The second part of this study simultaneously explored the effects of irrigation management scale and water application method on crop yield and water use efficiency. A field experiment was conducted in the Province of Québec; the soil type was a silty-clay loam with an important proportion of coarse rock fragments. The results showed that the soil hydraulic properties did not present any structured spatial patterns that could be used to delineate irrigation management zones. Physically based calculations of a critical matric potential in the root zone allowed to evaluate the magnitude of the differences in soil hydraulic properties required to justify a site-specific irrigation. The significant positive impact of a pulsed water application on crop yield and water use efficiency was also demonstrated. For the third part of this study, an approach allowing the simultaneous optimization of drip-irrigation system design and management parameters for strawberry production in a coarse soil was developed. A numerical model was used to predict the impacts of design and management parameters on 1) root uptake efficiency 2) applied irrigation water and 3) percolation below the root zone. The model was calibrated and validated with field observations of the root zone soil water potential. A sensitivity analysis allowed to evaluate the relative impacts of design and management parameters on single model outputs and on an optimization criterion calculated from multiple outputs. The results showed that the selection of an adapted application rate and irrigation duration had much more influence on model outputs than the irrigation threshold. Model predictions were used to identify optimal scenarios for the studied site and assess the potential of an alternate system configuration. The approached presented could be adapted to other cropping systems.
Anderson, Lelia. "Détermination de la stratégie d'irrigation optimale de la fraise basée sur le potentiel matriciel du sol et un modèle climatique." Master's thesis, Université Laval, 2016. http://hdl.handle.net/20.500.11794/26646.
Full textCormier, Julien. "Gestion optimisée de l'irrigation du fraisier à jours neutres." Master's thesis, Université Laval, 2015. http://hdl.handle.net/20.500.11794/27063.
Full textRational use of water is a growing concern. It is important to optimize the irrigation management of day-neutral strawberry plants in order to adequately meet the plant needs while reducing the pressure of agriculture on water. Some soils in the area of Île d’Orléans (Québec, Canada) present an important proportion of schist fragments (15-30%). Because of the high hydraulic conductivity, water flows mainly vertically under the drip tape with little horizontal movement, causing losses of water and nutrients. Different techniques, combined with the use of tensiometer, may be considered to improve the irrigation water use efficiency (IWUE) in this type of soil. Pulse irrigation, irrigation threshold (IT) adjusted according to ETc, installation of capillary mat under the root zone and a raised bed trough system with peat substrate were tested. The project aimed to determine the effect of irrigation management techniques on day-neutral strawberry plants development, yield, fruit quality, IWUE and soil properties. A randomized block design with five treatment was established in Saint-Jean-de-l’Ile-d’Orléans for two productions seasons. Pulse irrigation and soilless system have induced a non-significant increase of marketable yield by 10 % and 12 %, respectively, compared to the control treatment. Soilless system has, however, significantly increased the marketable yield by 86% in the first months of production. All treatments tested allowed to increase IWUE compared to the control. Because of its simplicity and its yield increase, pulse irrigation is recommended for this type of soil in order to reduce the amount of irrigation water.