Solution pH and Ion Uptake as Affected by Nitrogen Source and Cl- in Hydroponic Culture of Ageratum and Salvia
2004
Jeong, B.R. (Gyeongsang National University, Jinju, Republic of Korea) | Lee, C.W. (North Dakota State University, Fargo, ND, USA)
The influence of N fonus 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.
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