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To ensure better management of water resources and reduce the impact on the environment, it is essential to move toward precision irrigation. A new generation of wireless tensiometer that measures the water available to the plant and allows precise irrigation control has been evaluated. For improved efficiency, the best clustering practices based on the water needs of diverse species have been established. Evaluation of the best irrigation strategies in a commercial setting have demonstrated that water use can be reduced while maintaining an optimal growth. Recommendations have been made for improved water management practices in plant nurseries with the potential to help growers across the country.
Excess fertilization is not only costly but can also injure plants and cause unnecessary nutrient runoff, resulting in environmental damage. However, insufficient fertilization can result in plants showing symptoms of nutrient deficiencies, reduce crop productivity, and eventually reduce the efficiency of other resource inputs during nursery crop production.
This project was designed to meet industry demand for more native landscape plants as such plants are often better adapted to Canadian growing conditions. Nine new woody Newfoundland plant selections were provided to seven of Canada’s largest commercial plant propagating nurseries for evaluation. Unrooted cuttings/scions of the trial plants were supplied to the trialing nurseries to be propagated, grown in the nursery and then rated on their ability to root/graft, foliage appearance, flower production (if applicable), susceptibility to pests and diseases and overall plant habit.
A study of 20 native species planted for evaluation at three locations in Ontario and Newfoundland. In each location plant performance was evaluated in sun and shade, in different growth media and with different watering regimes. This study has identified several new or underused native Canadian plants which have proven potential as low maintenance ornamental plants.
Evaluation of a modified version of the CropAssist system developed for greenhouse tomatoes on other ornamental plants. Two greenhouse species and two nursery species, each of which differed in daily water requirements, were monitored for periods of up to 30 consecutive days. Results indicated that the CropAssist system effectively measured water uptake automatically and continuously.
Water application technologies were examined and a thorough literature review which identified some promising irrigation technologies for ornamental nursery plant production purposes. One technology in particular, a sensor-based automated irrigation system, was evaluated in a commercial nursery for pot-in-pot tree production and demonstrated that growers could cut their water usage by more than 50%.
A literature review was conducted and interviews with growers and water treatment companies to assemble information on available technologies. An interactive website will provide growers with an on-line decision process for choosing appropriate technology for their own operation.
Investigate biological and applied characteristics of the temperature relations within flowers and within plant stems through interdisciplinary research in micrometeorology, plant anatomy, pigmentation, microscopic morphology, growth rates, floral maturation and sexual reproduction.
Les quantités d’eau et d’engrais perdus lors des irrigations par aspersion peuvent être significatives ce qui est préoccupant pour le risque de contamination de l’eau de surface et souterraine. En pépinières ornementales au Québec, l’irrigation par aspersion demeure la plus utilisée, mais l’utilisation d’engrais à libération contrôlée est une pratique largement répandue. Ces deux pratiques ont été étudiées en interaction pour identifier la combinaison qui permettrait de réduire le plus significativement les pertes d’eau et d’engrais. Contrairement à ce qui est présenté dans la littérature sous les conditions de réalisation de ce projet, l’irrigation séquentielle n’a pas eu l’effet de réduire significativement les pertes d’eau et d’éléments minéraux. Les pertes de nitrates par lessivage ont été significativement plus élevées lorsque l’engrais à libération contrôlée était incorporé au substrat comparativement à l’application en surface. Le résultat le plus intéressant à considérer est que la majorité des nitrates sont lessivés dans les 10 premières semaines ou moins après l’empotage.
Communication Materials on the Latest Research