Duijvestijn Nursery – Sustainable cultivation
Sustainability is for Duijvestijn Tomaten the way how to handle natural resources. Sustainably making use of natural resources in such a way, where they remain available for future generations, or being replaced by equivalent alternatives. In other words sustainable cultivation.
Since the greenhouse sector and thereby Duijvestijn Tomaten also uses natural resources, a number of years ago they started a cost efficient strategy. A strategy wich means that it uses as little as possible of fossil fuels. And that the natural growth of tomatoes remains guaranteed as much as possible.
The sustainable way of cultivating tomatoes?
To grow tomato plants, they need only heat and light, water and nutrients. This takes the plant through its roots. The plants are grown on a substrate (rockwool). This allows the supply of water and nutrients to be fully adapted to the needs of the plant. The waste of water and nutrients is therefore almost zero. The rockwool is manufactured by supplier Grodan. This substrate serves as a buffer so that the plant always has water at his disposal.
The water to grow the tomato plants is not tap water, but rainwater. This is from the sustainable point of view of course logical. The company has therefore taken measures, so that the rainwater falling on the greenhouse, is being catched in large silos. These silos are not sufficient for Duijvestijn Tomaten in order to meet the sustainable vision they have. In the winters more rain than can be captured and in the summer there is sometimes too little water available.
That is why Duijvestijn Tomaten invested in an underground water storage. A system is present which pumps excess rainwater into the ground and can pump it out in the summer again. This water is stored between different layers of soil in the ground. Like a big ‘bubble’ it is isolated and can not be contaminated.
Which renewable heat sources are available?
Next to the optimization of the ground the other factors which are decisive for the growth of a plant are also attempted to control. In addition to nutrients and water there are: light, temperature and CO2. For the amount of light we are dependent on the supply of the sun. On the other hand, temperature can be better regulated. On ‘cold’ days, the heating is turned on to achieve the ideal temperature, while the windows will be opened on warm days to create the ideal temperature.
In order to obtain heat in the greenhouse, there are several resources that can be addressed. At Duijvestijn Tomaten we have chosen as one of the first glasshouse for geothermal heat. By this choice we can honestly say we really grow sustainable… for a healthier planet.