What is EC?
Electrical conductivity or “EC” is a measure of the focus of “total salt” in a nutrient answer (drip, plate or drain).
It is expressed as milliSiemens per linear centimeter (mS/cm) or microSiemens per linear centimeter (mS/cm), the place 1mS = 1000µS. The conductivity of a given solution varies with temperature, so most nutrient solution analyses are carried out at 20oC.
The greater the focus of “total salt” in the substrate, the higher the EC. Inorganic fertilizer ions similar to N, P, K, Ca, Mg, etc. are examples. Urea is an natural molecule and will not contribute to the EC of the solution because it does not conduct electrical energy like calcium (Ca) ions or nitrates. Nitrogen (NO3-N) ions can.
Ec in crops
The EC required for optimal plant development depends on the crop and variety grown, the physiological stage of plant development and the prevailing environmental circumstances inside and outdoors the greenhouse.
Why is it essential to observe EC?
The EC of the nutrient resolution impacts the expansion and development of the plant. In the winter, larger EC is used because it limits water uptake. As a result, the cells within the plant do not elongate or “grow” too much. They keep smaller and have thicker, stronger cell walls. The crops then look darker, shorter and have smaller leaves. In this case, the plant puts relatively more power into the formation of flowers and fruits (a production reaction). If the EC is too low beneath poor gentle situations (i.e. winter), the plant will produce too much leaf growth and too little fruit growth, and will therefore be over-nourished.
Conversely, excessive EC beneath excessive light circumstances (summer) will prohibit water uptake too much and thus limit the plant’s capacity to cool itself via transpiration. As a end result, the crop might be careworn.
EC additionally impacts yield and fruit high quality. In general, higher EC in the root zone setting results in decrease yields and smaller fruit size. This is as a end result of the cells within the fruit absorb less water, leading to lower fresh weight. However, higher EC results in higher fruit flavor. Therefore, a compromise have to be made between fruit quality, yield, and the nutritional and reproductive improvement of the crop.
Therefore, it could be very important keep the right EC in the root zone setting (measured because the distinction between slab EC and drip EC.) The value of EC varies for every crop kind and time of yr.
Monitoring EC within the slab
Monitoring EC in plates is an important component of weekly nutrition monitoring and should be performed day by day. For a significant and correct assessment, sampling should be performed in multiple consultant plates. Sampling is straightforward by simply pushing a syringe into the plate and withdrawing a small amount of nutrient answer (100 ml), which is then positioned into the cup of the EC meter for direct studying. The EC values are calculated and plotted on a graph in order that tendencies can be extra simply recognized.
Tips for correct EC measurements with transportable meters
Calibrate the EC meter periodically utilizing a standard answer.
Check the battery standing, low battery in portable EC meters is usually the purpose for errors.
Take measurements at the same time each day in order that outcomes could be interpreted extra easily.
Store the meter in a cool, dry place.
Read extra:
Conductivity: How to transform mS/cm to uS/cm
Difference between conductivity(EC) and TDS
What is residual chlorine?
What is turbidity?
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What is EC?
Electrical conductivity or “EC” is a measure of the concentration of “total salt” in a nutrient resolution (drip, plate or drain).
It is expressed as milliSiemens per linear centimeter (mS/cm) or microSiemens per linear centimeter (mS/cm), the place 1mS = 1000µS. The conductivity of a given solution varies with temperature, so most nutrient answer analyses are carried out at 20oC.
The greater the focus of “total salt” within the substrate, the upper the EC. Inorganic fertilizer ions such as N, P, K, Ca, Mg, and so forth. are examples. Urea is an organic molecule and received’t contribute to the EC of the answer as a result of it doesn’t conduct electricity like calcium (Ca) ions or nitrates. Nitrogen (NO3-N) ions can.
Ec in crops
The EC required for optimum plant development is determined by the crop and selection grown, the physiological stage of plant improvement and the prevailing environmental conditions inside and out of doors the greenhouse.
Why is it necessary to monitor EC?
The EC of the nutrient resolution affects the expansion and growth of the plant. In the winter, greater EC is used because it limits water uptake. As a outcome, the cells in the plant don’t elongate or “grow” an extreme quantity of. They stay smaller and have thicker, stronger cell walls. The crops then look darker, shorter and have smaller leaves. In this case, the plant puts relatively extra vitality into the formation of flowers and fruits (a manufacturing reaction). If เกจวัดแรงดัน is simply too low underneath poor light conditions (i.e. winter), the plant will produce too much leaf development and too little fruit development, and will due to this fact be over-nourished.
Conversely, excessive EC beneath excessive mild situations (summer) will prohibit water uptake an excessive quantity of and thus limit the plant’s capability to chill itself via transpiration. As a result, the crop might be stressed.
EC additionally affects yield and fruit high quality. In common, greater EC in the root zone setting leads to lower yields and smaller fruit size. This is as a result of the cells within the fruit absorb much less water, leading to decrease fresh weight. However, greater EC leads to better fruit flavor. Therefore, a compromise should be made between fruit high quality, yield, and the dietary and reproductive development of the crop.
Therefore, it is essential to keep the right EC in the root zone surroundings (measured as the difference between slab EC and drip EC.) The value of EC varies for every crop type and time of 12 months.
Monitoring EC within the slab
Monitoring EC in plates is an important part of weekly vitamin monitoring and should be carried out every day. For a significant and correct assessment, sampling ought to be carried out in multiple representative plates. Sampling is straightforward by merely pushing a syringe into the plate and withdrawing a small amount of nutrient solution (100 ml), which is then positioned into the cup of the EC meter for direct studying. The EC values are calculated and plotted on a graph in order that trends can be extra simply identified.
Tips for accurate EC measurements with transportable meters
Calibrate the EC meter periodically utilizing a regular solution.
Check the battery standing, low battery in moveable EC meters is commonly the cause for errors.
Take measurements on the similar time every day so that outcomes can be interpreted more simply.
Store the meter in a cool, dry place.
Read extra:
Conductivity: How to convert mS/cm to uS/cm
Difference between conductivity(EC) and TDS
What is residual chlorine?
What is turbidity?