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한국원예학회 HORTICULTURE ENVIRONMENT and BIOTECHNOLOGY JOURNAL OF THE KOREAN SOCIETY FOR HORTICULTURAL SCIENCE Vol.45 No.2
발행연도
2004.4
수록면
93 - 102 (10page)

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이 논문의 연구 히스토리 (2)

2005

Growth of Phalaenopsis in a Recirculating Ebb and Flood Hydroponic System as Affected by Ionic Strength of Solution and Medium Composition
Byoung Ryong Jeong ,  Jong Il Chung ,  Seung Jae Hwang 한국생명과학회 심포지움 2005.04 학술대회자료

2004

Solution pH and Ion Uptake as Affected by Nitrogen Source and Cl- in Hydroponic Culture of Ageratum and Salvia
Byoung Ryong Jeong ,  Chiwon W. Lee HORTICULTURE ENVIRONMENT and BIOTECHNOLOGY 2004.04 학술저널

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The influence of N forms and Cl? on solution pH and ion uptake in the hydroponic culture of Ageratum houstonianum (NH₄?-tolerant) and Salvia splendens (NH₄?-sensitive) for a time course of 216 h was investigated. The pH of the hydroponic solution (initially 6.50) supplied with either NH₄? or NH₄?+NO₃? was drastically lowered to 3.08, whereas that of the same solution supplied with NO₃? was raised up to 7.74. Solution pH changed more by ageratum than by salvia. The solution Cl? concentration did not influence solution pH significantly. However, the addition of Cl? in the solution lowered transpiration rate in both NH₄? and NO₃? treatments. Total N uptake was greatest in the NH₄? + NO₃? treatment and lowest in the NO₃? treatment. In the NH₄? + NO₃? treatment, NO₃? uptake was suppressed by NH₄? (to about 50%), while NH₄? uptake was not affected by NO₃?. The rate of Cl? uptake was lowest in the NH₄? treatment but was similar in the N₄? + NO₃? and NO₃? treatments. The uptake of K?, H₂PO₄?, SO₄²?, Mn²?, and Zn²? was significantly enhanced in the NH₄? treatment. The uptake rate of Ca²? and Mg²? was highest in the NO₃? treatment. Absorption of Cu²? and B was not affected by N source. Ion uptake was more stable in the solution containing both NH₄? and NO₃? than in the solution containing either NH₄? or NO₃?. The uptake rates of total N, NH₄?, NO₃?, Mn²?, Cu²?, and Zn²? were significantly higher in ageratum than in salvia, whereas those of Cl? and Mo were significantly lower in ageratum than in salvia. The amounts of total anion (TA) absorbed, but not total cation (TC), the difference (TC - TA), and sum (TC + TA) were all affected by N source, Cl? level and their interaction. The total anion and cation uptake was significantly depressed, due to reduced uptake of both TA and TC, but TC - TA was significantly increased in the NO₃? treatment compared to the NH₄? or the NH₄? + NO₃? treatments, especially in the absence of Cl?, Plant tissue ion contents were also affected by N source and Cl? level.
#Ageratum houstonianum #ammonium #ammonium toxicity #chloride #nitrate #Salvia splendens

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Abstract
Introduction
Materials and Methods
Results and Discussion
Acknowledgement
Literature Cited

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