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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)Phos

Nutrient strategies for fruiting crops Complete nutrient solution at 200ppm-N is a good starting place Adjust N:K ratio for vegetative and reproductive growth - N:K ratio near 1:1 during vegetative growth - N:K ratio of 1:1.5 or 1:2 during fruit development Supply high calcium (>150ppm) and magnesium (>50ppm), typically increase during fruiting

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