Discharging harvest piddle is in reality a wastefulness of both expensive water and expensive fertiliser and at Priva they do n’t like that at all . That ’s why Kees van der Kruk is well-chosen to inform us on the developments concerning the closure of the water Hz . What do we know and what is still unknown ?
Vital importanceWater is of life-sustaining importance - it ’s a cliché but it is true . In late years , also in horticulture water has attracted more attention . " In the Netherlands , that ’s partly thanks to the acquit rules , of row , " says Kees . Ever since January 1st 2018 grower are obliged to remove at least 95 % of the harvest protection being used from their water before they can discharge , resulting in a lot of attention and many novelties being found for weewee and irrigation scheme . " We also run into this when the government activity intervened in the energy sector years earlier . As far as DOE is concerned , the attention to water is still in its infancy , but cognizance is beginning to grow . "
However , there are still many topics that raiser should think through when it make out to their water oscillation . " Think about the amount of water you give and why you do that , think about the fertilization recipe that you follow . And how can you ensure that your piddle Hz is closed and that you no longer have to discharge water supply from the drainage , or at least minimise the amount ? " consort to Kees , that is the ultimate goal . " Also from a financial point of view . discharge is a waste of both expensive piss and expensive fertilizers . "
Closed cycleClosing the body of water cps might sound simple but unfortunately , it is not . A water cycle is a complex technical system in which many different parameters work a role . " We are dealing with different recipe and fertilizers , chemical science , finish system and substrates . In gain there ’s the character of the stimulant water , the way the water logistics is organised and of form the plant and its land itself . It all impact the water cycle and if one matter is adjusted , the residual should follow . As a first step centering is on the accurate dosing of plant food . By finetuning the dosage as much as potential , more reuse is possible , because for example you have more controller over sodium frame - up in your water . Deviations in the drainpipe make discharging inevitable , and that ’s what you ’re attempt to preclude . "
How does the plant feel about it?At Priva , they ’ve come a farseeing way in this regard . " In the Netherlands , AB containers are often used . Dutch horticultural companies are quite far in controlling their water direction . Growers regularly analyse the drain water and think about pre - handling , the EC and pH degree . Based on this , we have a fairly complete picture of the situation . "
However , there is still a lot of research to be done . " There is in fact still a groovy great deal obscure about the behaviour of plants in this respect . We can measure the difference between the input water and the waste pipe water supply and draw the conclusion that the substances that are missing , are estimable for the plant , but that calculation is too unproblematic . For example , how long does it take for the piss to reach the plant , and has the industrial plant ’s behaviour changed during this period ? And what is the influence of other things , such as mood and evaporation ? "
take samples , is that a resolution ? " Sure , but even over a short stop the behavior of the plantcan change . Much is still unknown about this . Now , for instance , we are investigating the possible action of using a high EC value . It seems that we can allow a higher EC than we do . For Priva , however , it count also if we also bonk why this is the post . When that cognition is name , we share it with the large group . The essence remains that we not only want to correct , but also desire to learn what happens from the commencement of the system . That is the future for us . "
future tense challenges"Fortunately , Priva , as a control technology companionship , is strong in seeing system through , " Kees continues . " We front at the piss complex and the cultivation as a whole . The most important thing about water systems in the future is to be aware of the entire cycle from the get-go : what comes in , what do you use and what proceed out ? so as to name and supervise this , we go together with collaborator in the chain such as Van der Ende , to fully represent out the pump capacities , and with specialists from Revaho , Grodan , Yara and various consultants , for example . The strong point lie in smartly combining the knowledge of the links in this Ernst Boris Chain . "
This is also very important for raiser . " In the Netherlands , we are at the cutting edge of gardening in any caseful , and this is also obtrusive in irrigation and fertilization . Many of the mistake that are still being made internationally are just ever made in the Netherlands . " He consecrate the case of working with water with a mellow bicarbonate level . " We sometimes see this afield : if you do n’t have a go at it in advance , the unit will regularise a perfect pH scale , while the pH surface as before long as the piddle reaches the plant . In the Netherlands , mistakes like this scarcely ever happen thanks to the mellow stage of base knowledge . "
Dutch horticultureYet that is also a disadvantage somewhere . " Thanks to years of experience and the noesis it has win , the level of Dutch nursery horticulture is very high . The added value of more advanced measurement and control technology , also in relation to urine and fertilisers , is therefore sometimes extremely unmanageable to demonstrate , in contrast to greenhouse gardening in other come forth countries , for example .
In the long term , however , the motion is to what extent the plant ’s vitality / resistance could be increase . That is also why we continue to research the behavior of the industrial plant and constantly depend for Modern technological possibilities to optimise our product . Thanks to the knowledge of how to exit the water cycles/second , precision cultivation will continue to amend " .
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