What is EC?
Electrical conductivity or “EC” is a measure of the concentration of “total salt” in a nutrient solution (drip, plate or drain).
It is expressed as milliSiemens per linear centimeter (mS/cm) or microSiemens per linear centimeter (mS/cm), where 1mS = 1000µS. The conductivity of a given solution varies with temperature, so most nutrient resolution analyses are performed at 20oC.
The greater the focus of “total salt” within the substrate, the upper the EC. Inorganic fertilizer ions corresponding to N, P, K, Ca, Mg, and so on. are examples. Urea is an organic molecule and won’t contribute to the EC of the solution because it does not conduct electricity like calcium (Ca) ions or nitrates. Nitrogen (NO3-N) ions can.
Ec in crops
The EC required for optimum plant growth is determined by the crop and variety grown, the physiological stage of plant improvement and the prevailing environmental situations inside and outside the greenhouse.
Why is it necessary to observe EC?
The EC of the nutrient answer affects the expansion and improvement of the plant. In the winter, higher EC is used as a result of it limits water uptake. As a end result, the cells within the plant do not elongate or “grow” an excessive amount of. They keep smaller and have thicker, stronger cell walls. The plants then look darker, shorter and have smaller leaves. In this case, the plant places relatively extra vitality into the formation of flowers and fruits (a production reaction). If the EC is simply too low under poor gentle situations (i.e. winter), the plant will produce too much leaf growth and too little fruit development, and will due to this fact be over-nourished.
Conversely, excessive EC under excessive light situations (summer) will limit water uptake too much and thus restrict the plant’s ability to chill itself through transpiration. As a outcome, the crop shall be stressed.
EC additionally affects yield and fruit high quality. In common, higher EC within the root zone surroundings results in decrease yields and smaller fruit size. This is as a outcome of the cells in the fruit take in less water, resulting in decrease contemporary weight. However, greater EC results in higher fruit taste. Therefore, a compromise should be made between fruit quality, yield, and the nutritional and reproductive improvement of the crop.
Therefore, you will want to maintain the correct EC in the root zone environment (measured because the difference between slab EC and drip EC.) The value of EC varies for every crop kind and time of year.
Monitoring EC in the slab
Monitoring EC in plates is a vital element of weekly vitamin monitoring and ought to be carried out daily. For a significant and accurate evaluation, sampling should be performed in a quantity of consultant plates. Sampling is easy by simply pushing a syringe into the plate and withdrawing a small amount of nutrient resolution (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 so that tendencies can be extra simply identified.
Tips for accurate EC measurements with transportable meters
Calibrate the EC meter periodically using a regular resolution.
Check the battery standing, low battery in transportable EC meters is commonly the reason for errors.
Take measurements on the similar time each day so that outcomes may be interpreted extra easily.
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?
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What is EC?
Electrical conductivity or “EC” is a measure of the focus of “total salt” in a nutrient solution (drip, plate or drain).
It is expressed as milliSiemens per linear centimeter (mS/cm) or microSiemens per linear centimeter (mS/cm), where 1mS = 1000µS. The conductivity of a given answer varies with temperature, so most nutrient solution analyses are performed at 20oC.
The larger the concentration 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 organic molecule and will not contribute to the EC of the answer as a end result of it does not conduct electrical energy like calcium (Ca) ions or nitrates. Nitrogen (NO3-N) ions can.
Ec in crops
The EC required for optimum plant progress is decided by the crop and selection grown, the physiological stage of plant growth and the prevailing environmental situations inside and out of doors the greenhouse.
Why is it necessary to observe EC?
The EC of the nutrient resolution impacts the expansion and development of the plant. In the winter, greater EC is used as a result of it limits water uptake. As a outcome, the cells in the plant do not 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 production reaction). If the EC is just too low underneath poor gentle circumstances (i.e. winter), the plant will produce an extreme amount of leaf progress and too little fruit development, and can subsequently be over-nourished.
Conversely, ไดอะแฟรม beneath excessive light situations (summer) will prohibit water uptake an excessive amount of and thus limit the plant’s capacity to chill itself by way of transpiration. As a result, the crop shall be careworn.
EC additionally impacts yield and fruit high quality. In general, greater EC in the root zone environment results in decrease yields and smaller fruit dimension. This is as a result of the cells within the fruit absorb less water, leading to decrease contemporary weight. However, greater EC results in better fruit taste. Therefore, a compromise should be made between fruit high quality, yield, and the nutritional and reproductive improvement of the crop.
Therefore, it could be very important keep the proper EC within the root zone setting (measured because the difference between slab EC and drip EC.) The value of EC varies for every crop sort and time of year.
Monitoring EC in the slab
Monitoring EC in plates is a vital element of weekly nutrition monitoring and should be carried out every day. For a significant and correct assessment, sampling must be performed in a number of consultant plates. Sampling is straightforward by simply pushing a syringe into the plate and withdrawing a small quantity of nutrient resolution (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 so that trends may be extra simply recognized.
Tips for correct EC measurements with moveable meters
Calibrate the EC meter periodically using a regular resolution.
Check the battery status, low battery in transportable EC meters is usually the trigger of errors.
Take measurements at the identical time each day so that results may be interpreted more simply.
Store the meter in a cool, dry place.
Read more:
Conductivity: How to convert mS/cm to uS/cm
Difference between conductivity(EC) and TDS
What is residual chlorine?
What is turbidity?