토양에의 고농도 Na 및 Cl 염류가 토마토의 생육 및 무기성분 흡수에 미치는 영향 = Effect of High Concentrations of Sodium or Chloride Salts in Soil on the Growth of and Mineral Uptake by Tomatoes

다국어 초록 (Multilingual Abstract)

This study was conducted to investigate the effect of high concentration of sodium salts and chlo-rides in soil on the growth of tomato and the uptake of minerals. The growth inhibition rates of plantheight and dry weight were different depending on salts, but they were not related to the electric con-ductivities (EC) and acidities (pH) in the soil solution. The orders of growth inhibition were Cl, SO4,CO3, PO4 > NO 3 in the sodium salts series, and Na, K, Mg, NH4 > Ca in the chlorides. The growthinhibition rates of the sodium salts series tended to be larger than those of the chloride series. Yieldwas lower 30%~10% in the sodium salt and chloride series than in the control. Chlorophyll content,photosynthetic rate and stomatal conductance were lower in the sodium salts and chloride series thanin the control. Mineral concentration was lower in sodium salts and chlorides than in control. Thenitrate absorption was inhibited in all salts except for NaNO3 and NH 4Cl, and specially in NaCl andNa2SO4 treatments of the sodium salts and in KCl treatment of chloride series. K concentration wasreduced NaCl and Na2SO4 treatments compared with the other salts. In the sodium salt series, cal-cium and magnesium concentration were decreased antagonistically when sodium concentration wasincreased.