It is well known that CO2 contributes to a good rise crop . It is also jazz that Night , a gas that is produced during incineration such as in CHPs , is harmful to the crop . But research now shows that small amounts of Night can really increase takings .
A noteworthy conclusion , says Jacco Besuijen . He is an energy coach at Prominent , a producer organization which consists of 420 hectares of vine tomato refinement at 54 locations . spectacular participated in research take by Environmental Monitoring Systems and Hoogendoorn Growth Management because the tomato grower at most of the locations work with air pollution detector from EMS , the MACView Greenhouse Gas Analyzer .
Previous research exhibit that too high concentrations of NOx in CO2 dosing can lead to a expiration of 6 % yield . In this new study , dosing was carried out for 500 days , mainly with CHP .
Too gamy NOx concentration reduce CO2In a greenhouse with tomato cultivation , in summation to the known parameters , also ethene , NOx and photosynthesis were measured and scales were placed to observe the weight amplification in 24 hour . The data analytic thinking distinctly show that too high-pitched NOx concentrations lead to a decrease in electron transportation . This even though there were higher CO2 immersion in the nursery at those time .
" It is therefore important for growers to know that you presume to introduce more CO2 and await that growth will be stimulated , " says Jan - Kees Boerman of EMS . " Research however shows that too in high spirits NOx concentrations lead to a clear diminution in negatron transport , and therefore a step-down in biomass changeover ( growth ) and therefore a decrease in harvest .
The too high NOx concentration actually demolish the eminent CO2 concentrations . This is , among other things , another reason to use CO2 - setpoints that are not too high , certainly during cloudy weather or with closed windows . "
high fruit manageable with right dosageThe research shows that with low CO2 concentrations and a correct NOx concentration , very gamy yield are achievable , which of course is related to negatron conveyance . " In a horse sense you could say that too high NOx absorption over time gradually chair to poisoning of the crop , " sound out Jan - Kees .
That is not seeable outwardly . " Degradation of Night in the works costs zip , we see that ruminate in the decrease in negatron transport and that leads to a substantial decrease in growth . “Optimum NOx concentrationConversely , it has been remark that Night in low concentrations direct to slightly higher issue liken to greenhouses without NOx present . " In practice , it concerns relatively low-spirited concentrations , " say Jan - Kees . " NOx break down into atomic number 7 as well as oxygen and these substance can be used as a construction block for plants . This consequence contributes to growth , and is also called the ' Plant Vitalization Effect ' . This effect applies to most crop case . "
With this knowledge there is a form of optimum NOx concentration for crop . " It is therefore an chance for growers to regulate NOx in addition to the CO2 , which is already hap in some greenhouses , " according to Jan - Kees ' experience . " The inquiry shows that there is a higher craw payoff due to the correct purpose and control of the NOx assiduousness that are released in the glasshouse . This Plant Vitalization Effect is a possibility to further optimize refinement with CO2 dosing , " Jan - Kees close . EMS analyzers mensurate different CO2 sources in greenhouses : CHP / RGR , boiler CO2 , OCAP CO2 and liquid CO2 .
For more information : Environmental Monitoring Systems ( EMS ) B.V.[email protected]www.macview.nl
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