Transcription of Managing nutrient solutions for hydroponic crops
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Managing nutrient solutions for hydroponic crops
Managing nutrient solutions for hydroponic cropsRyan Dickson, nutrient film technique (NFT) Deep water culture Slab or soilless substrate cultureDifferent types of hydroponic systems Supplying all essential elements and Managing nutrient levels in hydroponic solution The effects of nutrient solution pH on nutrient availability and preventing high and low pH problems Outline nutrient and pH management is not complex Supply all essential nutrients in a moderate amount, keep pH between and , and you should be fine But this is a nutrition lecture, so more we get too come from multiple placesSubstrateIrrigation WaterWater-soluble fertilizersExamples of greenhouse water results from labGreenhouseWell #1 Well #2 Target (ppm CaCO3)3524240120EC (mS/cm) (ppm) (ppm)< (ppm)2170150Ca(ppm) (ppm) (ppm)111800120Fe (ppm)< (ppm) (ppm)15280100Cl(ppm) NutrientsNitrogen (N)Phosphorus (P)Potassium (K)Magnesium (Mg)Immobile NutrientsCalcium (Ca)Zinc (Zn)Iron (Fe)Copper (Cu)Manganese (Mn)Boron (B)PartiallyMobileSulfur (S)Molybdenum (Mo)Mobility of nutrientsDeficiency with an immobilenutrient: Iron (Fe)New leaves = deficientOld leaves = healthyFe cannot be mobilized to new growthDeficiency with a mobilenutrient: Nitrogen (N)New leaves = healthyOld leaves = deficientNis mobilized to new growthN-deficient NormalDeficiency: Low fertilizer stunts growth, pale foliage150ppm N25ppm NToxicities: nutrients
Honing your nutrient program • Measure nutrients regularly in raw irrigation water, nutrient solution, and plant tissue • Be the detective, adjust based on nutrient accumulation/depletion • Work with a university extension specialist or fertilizer supplier
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