Changes in Chemical Characteristics of Drainage Solution as Influenced by Years of Root Media Use in Successive Hydroponic Cultivations of ‘Seolhyang’ Strawberries

Changes in the pH, electrical conductivity (EC), and concentrations of essential nutrients have to beanalyzed to enable reuse of the drainage solution (DS) in closed hydroponic cultivation of a cropbecause the chemical characteristics (CC) of drainage vary in relation to the kind of crop grown andth...

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Veröffentlicht in:Weon'ye gwahag gi'sulji 2019, 37(3), , pp.375-383
Hauptverfasser: Lee, Hee Chul, Kim, Hyun Sook, Jang, Won Suk, Nam, Myeong Hyeon, Lee, In Ha, Lee, Mun Haeng, Kim, Tae Il, Lee, Eun Mo, Choi, Jong Myung
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Sprache:eng
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Zusammenfassung:Changes in the pH, electrical conductivity (EC), and concentrations of essential nutrients have to beanalyzed to enable reuse of the drainage solution (DS) in closed hydroponic cultivation of a cropbecause the chemical characteristics (CC) of drainage vary in relation to the kind of crop grown andthe root media used. The objective of this research was to investigate changes in the CC of DSduring cultivation of ‘Seolhyang’ strawberries. The root medium is composed of coir dust, peatmoss, and perlite in the ratio 6:2:2 (v/v/v), and the composition of the nutrient solution applied forcrop cultivation is N, P, K, Ca, and Mg at 15, 5, 7, 6, and 2 mg·L-1, respectively. The changes in theCC of the DS as well as the growth, yield, and fruit quality were investigated in relation to thenumber of years the root media used. The pH of the DS decreased as the number of years of rootmedium usage increased. The ECs of DS in all treatments were in the range of 0.8 to 1.5 dS·m-1during the growing season and tended to rise as the number of years of usage in the root mediumincreased. The concentrations of NO3 and Ca in the DS ranged from 200 to 600 mg·L-1 and 52 to 176mg·L-1, respectively. The K concentration in the DS was in the range of 104 to 221 mg·kg-1 in alltreatments during the growing season. The concentrations of P and Mg in the DS were 15 to 60mg·L-1 and 18 to 48 mg·L-1, respectively. As the number of years of root media usage increased, theconcentrations of NO3, P, Ca, and Mg tended to rise, whereas that of K tended to decrease. Thedifferent treatments with varying number of years of root medium usage did not lead to significantdifferences in plant growth, tissue nutrient content, budding and flowering date, and total yield. Theresults from this research, the changes in nutrient composition of the DS and their effect on tissuenutrient content, can be used to modify the nutrient composition in the DS when the solution isreused in closed hydroponic cultivation of ‘Seolhyang’ strawberries. KCI Citation Count: 0
ISSN:1226-8763
2465-8588
2465-8588
1226-8763
DOI:10.7235/HORT.20190038