Research trials at Wageningen UR Greenhouse Horticulture

Wageningen UR Greenhouse Horticulture and Green Q Horticultural Expertise Group invite all interested parties to visit the research facilities in Bleiswijk during the Horti Fair. Two buses from Amsterdam to Bleiswijk will be organised. You can also visit the facility with your own transportation.

Algae cultivation systems for horticulture

The production of high-quality algae offers horticultural growers good prospects in the future. Strategic issues are: 

  • What is a suitable cultivation system for cultivating high-quality algae in combination with horticultural products?
  • How can production be optimised by adjusting growth factors such as light, CO2 and nutrients?

Approach

The project has various research components:

  • Analysis of practical algae systems at growers by collecting measurement data.
  • Small-scale horticulture-specific experiments (this greenhouse).
  • New algae production system developed with the help of integral climate and growth models, linked to economic models.
  • Exchange of experiences in a growers’ group, sharing the results and discussion.
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Partners

  • Jelle van den Bos (Kwekerij van den Bos),
  • Frans Bunnik (Bunnik Plants),
  • Kees Kap (Kwekerij Kap),
  • Jaco Kieviet (Komkommerkwekerij),
  • Kees van Kilsdonk (Algaespring),
  • Cees van der Lans (Lans Tomaten),
  • Peter Schrama (Olij Rozen),
  • Gerrit Vermeer (Newplant),
  • Bart van Wijlick (Zuppi)

Evaluation of technologies for purification of discharged water – Innovation and Demonstration Centre Water

Purpose

Testing water treatment technologies on the effectiveness and applicability in a greenhouse environment.

Approach

At the moment, four techniques are tested on a semi-practical scale with regard to effectively removing pesticides from drain water that is discharged from the greenhouse into the environment. The tests are carried out with both standardized discharge water and water originating from a commercial rose greenhouse. Standard water contains micro and macro nutrients, organic pollution (TOC 20 mg) and 12 pesticides.

The technology suppliers are responsible for the proper working and settings of the equipment.

Water technology and greenhouse horticulture experts (including 2 growers)will evaluate the technologies in terms of applicability and robustness.

Partners

This research is carried out in collaboration with Netherlands Water Partnership and financed by: the Product Board of Horticulture, the Dutch Ministry of Economic Affairs, Agriculture and Innovation, the Dutch Ministry of Infrastructure and Environment,  Delfland Water Board, Schieland and Krimpenerwaard Water Board, Evides, Syngenta, Bayer, Basf and Certis.

Next Generation Lighting

Purpose

While saving energy, achieving the same production and quality as with a healthy crop.
Studying the effects of diffuse light in the summer and winter in a crop with artificial lighting
Effects of hybrid lighting using SON-T or led top lighting.

Providing light according to the need of the crop.

Approach

Highlight optimal tomato cultivation under diffuse light using hybrid lighting and top lighting. Planting date: 29 August Variety: Komeett Lighting according to crop needs and measure underlying processes.

Partners

The research was funded by the Product Board of Horticulture and the Dutch Ministry of Economic Affairs, Agriculture and Innovation and was carried out as part of the Innovation Programme Greenhouse as Energy Source. Guardian is the glass supplier.

Building stones for thrips control in chrysanthemums

Purpose

Determining which type of predatory bugs sustain best in chrysanthemums and keep thrips at a low level.

Approach

Six successive cultivations are being exposed to seven different predatory bugs at the same time: Neoseiulus cucumeris, Nesoseiulus barkeri, Nesoseiulus reductus, Amblyseius andersoni, Amblyseius swirskii, Amblyseius montdorensis, Amblydromalus limonicus. Each cultivation is sampled three times for predatory bugs and thrips. Subsequently, the collected predatory bugs are determined.

Partners

The research is funded by the Product Board of Horticulture with a contribution from Syngenta Bioline and Koppert. These firms together also supply six of the seven other predatory bugs.

CO2 limits for Gerbera

Purpose

To demonstrate that it is very well possible to cultivate Gerbera with a CO2 concentration of maximum 550 ppm and a maximum dosing of 75kg/ha/hour.

Approach

Comparing the growth of three Gerbera varieties – Suri (red), Kimsey (pink) and Rich (dark pink, black centre) – in two greenhouse sections that are subjected to differences in CO2 dosages. Two sections are compared:

  • maximum 550 PPM and 75 kg/ha/hour
  • maximum 850 PPM and 150 kg/ha/hour

Observations: production in items, flower weight and size, and plant development.

The research is funded by the Product Board of Horticulture and the Dutch Ministry of Economic Affairs, Agriculture and Innovation and was carried out as part of the Innovation Programme Greenhouse as Energy Source.

More grip on light

Purpose

Natural light has the potential of saving energy and improving cultivation.

Additional light in a greenhouse stimulates extra growth and saves energy. To prevent additional light from causing light damage, we have also developed plant monitoring.

The objective is 50% energy saving by means of more natural light and adapted regulations with respect to temperature and screening.

Approach

This research project compares energy consumption and growth between sections with diffuse screen covering, diffuse greenhouse cover and greenhouse with daylight. The daylight greenhouse is a greenhouse with Fresnel lenses in the roof that focus direct sunlight and converts it into other forms of energy.

Partners

Guardian (glass supplier), Ludvig Svensson (screen covers), Bromeliad committee, Potted anthurium committee, Anthura and Rijnplant. The research is funded by Biosolar Cells, the Product Board of Horticulture and the Dutch Ministry of Economic Affairs, Agriculture and Innovation and was carried out as part of the Innovation Programme Greenhouse as Energy Source.

VenLowEnergy kas

Purpose

Minimum energy consumption without loss of production. The research is carried out with tomato variety Komeett.

Approach

Achieving minimal energy consumption by:

  • Optimal insulation; achieved in the greenhouse by means of double glass with a transmission equal to standard greenhouse glass
  • Dehumidification by fresh air treatment and heat recovery.
  • Basic heating consists of an air-heating system.
  • Adapted cultivation concept such as the use of minimum pipes, a smoother climate transition.

Partners

The research is funded by the Product Board of Horticulture and the Dutch Ministry of Economic Affairs, Agriculture and Innovation and was carried out as part of the Innovation Programme Greenhouse as Energy Source.

Daylight greenhouse

Purpose

Natural light has the potential of saving energy and improving cultivation.

More light in the greenhouse stimulates growth and saves energy.

 By 2012 greenhouses must have CO2 neutrality. The daylight greenhouse is a prototype used for working towards this objective.

Approach

This greenhouse uses Fresnel lenses to focus direct light on a collector, which in turn converts it into heat or heat & electricity. The light admitted is almost fully diffused at a higher level than normally admitted in ‘shadow cultivation’. This greenhouse participates in a large potted-plant research project into light and it is called Grip on Light. Presently, the experiments are with Anthurium and Bromelia.

Partners

Technokas and Bode Engineers. The research is funded by the Product Board of Horticulture and the Dutch Ministry of Economic Affairs, Agriculture and Innovation and was carried out as part of the Innovation Programme Greenhouse as Energy Source.

Health from the greenhouse

Purpose

Build up basic expertise for producing health-promoting products in greenhouses.

Approach

In this greenhouse, researchers are investigating the effect of cultivation measures, including light intensity and light colour (by means of led) on the content of ascorbic acid (vitamin C) and other anti-oxidants in tomatoes.

Partners

The research is funded by the Dutch Ministry of Economic Affairs, Agriculture and Innovation and Philips.

In addition, the following experiments can be viewed:

ROOTOPOWER

Purpose

Selection of a vigorous rootstock

Effect of summer climate on Cymbidium

Purpose

Improved branching and growth of shoots in the summer in early-blossoming Cymbidium

Resilient substrate: Practical experiments

Purpose

Making existing measurements of soil resilience applicable to substrates and plants in fruit vegetables and ornamental plants under glass in order to combat a set of major diseases and pests. Subsequently, using these measurements to develop measures to control an increase of resistance in substrates and plants against a set of major pathogens.

Testing new substrates on the provision of nutrients

Purpose

A number of new substrates are tested for the consortium Pure, Horticoop and Dutch Plantin for providing nutrients.

Testing the resistance of soils with regard to resistance to Meloidgyne incognita

Purpose

Determining the extent of resistance of two soils, each with seven treatments against the root-knot nematodes M. incognita.

Methods against excessive root growth (Agrobacterium rhizogenes) in tomato cultivation

Purpose

Testing treatments during the tomato cultivation phase so that microflora in the Agrobacterium rhizogenes substrates hinders infection.

New generalist predators for controlling aphids in paprika

Purpose

Improving biological control of aphids in paprika

Practical test of dripping electrolysis water in tomatoes together with nutrient solution

Purpose

Practical test with dripping electrolysis water in tomatoes together with the nutrient solution to prevent the spread of bacteria. Also testing side effects of electrolysis water on beneficial micro-organism.

Next Generation Culitvation Lisianthus: substrate and lighting

Technical objective:

  • Build up experience with the cultivation of Lisianthus on substrate.
  • Quantify under which circumstances assimilation lighting stimulates the most growth.
  • Providing a set of measures to create the desired blossoming speed for the formation of branches while using less assimilation lighting.

Energy objective:

  • If the heating need remains the same, then the electricity consumption for assimilation lighting can be reduced by at least 20% or 70kWh/m2 per year.
  • By cultivating in substrate, growers hardly need to steam. This saves 20m3/m2 per year.
  • Drier climate reduces the energy input for removing humidity.

Nutrients and resilient cultivation Phalaenopsis

Purpose

Cultivating a healthy crop with increased production and quality by means of adapted nutrients and more light in the greenhouse.

Effect of watering method and cultivar on biological control of thrips in Alstroemeria

Purpose

To determine whether the pupation behaviour of thrips can be determined / controlled by the choice of watering method (sprinklers vs. drip system) and cultivar.

Practical test using ultrasound atomizer with electrolysis water against mildew in roses

Purpose

Practical test using ultrasound atomizer with electrolysis water against mildew in roses

AgroAKI Research: cultivation system using dry mist

Purpose

To look into the possibilities of cultivating tomatoes via the AgroAKI system (of Ikeuchi Europe B.V.) of very fine mist, also known as dry mist.

Natural enemy against mealybugs and scale insects

Purpose

To develop management strategies for mealybugs and scale insects in the cultivation of ornamental plants.

Resilient substrate: matrix and experiments

Purpose

Creating the tools for measuring the resilience of plants and substrate and to create resilient substrates using strong plants.

PPP Paprika

Purpose

Developing a distinctive paprika concept in the chain that combines People, Planet and Profit.

Taste model for RIL (Recombinant Inbred Line) populations using specific aromas

Purpose

To determine the effect of specific aromas on the taste of tomato.
To develop models that can predict the taste of relevant RIL populations.