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KMID : 0903620000410040350
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Journal of the Korean Society for Horticultural Science
2000 Volume.41 No. 4 p.350 ~ p.355
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Deifciency Symptom , Growth Characterisitcs , and Nutrient Uptake of ´ Nyoho ´ Strawberry as Affected by Controlled Potassium Concentrations in Fertilizer Solution
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Hemphill, D D
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Abstract
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The objectives of this research were to drive the symptoms of K deficiency and to determine critical concentration of plants and soil when potassium deficiency was revealed. The first symptom of K deficiency was slow growth. As the deficiency continued, the edges of old leaves got brown spotted and later became necrotic. The leafstalk or the part near it turned to purple. The treatment of 10 mM K had the highest dry weight with 8.1 g and 1.54% of tissue K content based on dry matter of whole above ground plant part. The highest fresh weight was achieved in the treatment of 15 mM K and K concentration in plant sap of this treatment was about 6500 ㎎·㎏^(-1) based on fresh weight of whole above ground plant part. Potassium concentration in perlite media was analysed to be 289 and 490 ㎎·㎏^(-1) in the treatment of 10 mM and 15 mM, respectively. It indicated that K concentration in soil solution in view of fresh weight should be remained in the range of 300 to 500 ㎎·L^(-1).
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