12 documents found, page 1 of 2
Influence of plant age, chilling hours and genotype on the number of new shoots...
Viegas Oliveira, J.; Oliveira, C. M.; Luz, F.R.; Oliveira, P.B.Little is known about the factors affecting vegetative propagation of raspberry plants by root buds to maximize plant production in the nurseries. The number of buds in the roots that can produce suckers is cultural (planting date, cane density, soil type, moisture, etc.) and climatic (temperature and photoperiod) dependent. Plant age is a factor that influences root system weight as a longer time for root deve...
Effect of plant density in long-cane blackberry winter production
Dias Santos, I.; Oliveira, C. M.; Oliveira, P.B.Blackberry production in Portugal is increasing mainly in the winter months due to the higher off-season prices. In order to produce fruit in this period growers need to use long-canes. This is a new production system used with great success in raspberries but little is known about its adaptation to the blackberry. Blackberries are plants with a high vegetative growth and nurseries often send to grower plants d...
Study of flower bud differentiation and development to improve strawberry produ...
Palha, M.G.; Valdiviesso, T.; Oliveira, C. M.; Oliveira, P.B.In order to extend out-of-season strawberry production in protected culture it is common to use plants with pre-formed flower buds to increase yield. This study aimed to characterize the flower bud differentiation in different commercial plant types and to examine the dynamic of the flowering throughout fall, winter and spring production in short-day (SD) and day-neutral (DN) strawberry cultivars. Experiments w...
The effect of LED illumination on flower differentiation of strawberry short-da...
Codrea, M.M.; Valdiviesso, T.; Oliveira, Cristina M.; Mitre, V.; Oliveira, P.B.; Palha, M.G.Plants such as tray and mini-tray (in replace of bare-root plants) and artificial assimilation lighting systems on strawberry tunnels have been used to ensure better crop productivity and to increase the competitiveness of the Portuguese strawberry sector. In order to observe if LED (light emitting diodes) supplemental illumination will affect flower differentiation and development of short-day strawberry culti...
Influence of cold storage on growth, productivity and root reserves of ‘Kwanza’...
Oliveira, P.B.; Moreira, B.R.; Oliveira, Cristina M.The long-cane raspberry production system under tunnels allows fruit production throughout the year. However, the effect of plant origin and the duration of the artificial chilling period on plant productivity are not yet fully understood. The objective of this study was to evaluate the influence of cold storage duration in the production and development of ‘Kwanza’ raspberry in Odemira, Portugal (37°35’05”N; 8...
Phytoplankton distribution and physical processes off NW Iberia during two cons...
Oliveira, P.B.; Amorim, F.N.; Dubert, J.; Nolasco, R.; Moita, T.This work presents the results of two oceanographic surveys conducted off NW Iberia during successive summer upwelling seasons, aiming at the identification of the physical processes underlying the phytoplankton distri- bution in the area. Mooring (ADCP and thermistors) and ship-based CTD-F observations corroborate previous results that wind-driven upwelling circulation, (sub)mesoscale eddies and the stratifica...
Cross-shore transport in a daily varying upwelling regime: A case study of barn...
Trindade, A.; Peliz, A.; Dias, J.; Lamas, L.; Oliveira, P.B.; Cruz, T.With favored offshore and downstream advection, the question of which physical mechanism may promote onshore transport of larvae in upwelling systems is of central interest. We have conducted a semi-realistic high resolution (0.25 km) numerical study of Lagrangian transports across the inner-shelf under upwelling-favorable wind forcing conditions, focusing on the shelf area of the Southwestern Portuguese coast,...
Diurnal variability of inner-shelf circulation in the lee of a cape under upwel...
Lamas, Luísa; Peliz, A.; Dias, Joaquim; Oliveira, P.B.; Angélico, M.M.; Castro, J.J.; Fernandes, J.N.; Trindade, A.; Cruz, T.The nearshore circulation in the lee of a cape under upwelling conditions was studied using in-situ data from 3 consecutive summers (2006–2008). Focus was given to a period between 20 July and 04 August 2006 to study the diurnal variability of the cross-shelf circulation. This period was chosen because it had a steady upwelling-favourable wind condition modulated by a diurnal cycle much similar to sea breeze. T...
Cross-shore transport in a daily varying upwelling regime: A case study of barn...
Trindade, A.; Peliz, A.; Dias, Joaquim; Lamas, Luísa; Oliveira, P.B.; Cruz, T.With favored offshore and downstream advection, the question of which physical mechanism may promote onshore transport of larvae in upwelling systems is of central interest. We have conducted a semi-realistic high resolution (0.25 km) numerical study of Lagrangian transports across the inner-shelf under upwelling-favorable wind forcing conditions, focusing on the shelf area of the Southwestern Portuguese coast,...
Validation of standard and alternative satellite ocean-color chlorophyll produc...
Sá, Carolina; D'Alimonte, D.; C. Brito, Ana; Kajiyama, T.; Mendes, C.R.; Vitorino, J.; Oliveira, P.B.; da Silva, J.C.B.; Brotas, VandaChlorophyll a concentration (Chl) product validation off the Western Iberian coast is here undertaken by directly comparing remote sensing data with in situ surface reference values. Both standard and recently developed alternative algorithms are considered for match-up data analysis. The investigated standard products are those produced by the MERIS (algal 1 and algal 2) and MODIS (OC3M) algorithms. The altern...