The Adsorption and Desorption of SO4-2 in the Garlic Field

마늘 재배지토양(栽培地土壤) 중 SO4-2의 흡(吸), 탈착(脫着)

  • Chang, Gi-Chul (Dept. of Agricultural Chemistry, Coll. of Agri., Kyung-pook National University) ;
  • Chang, Sang-Moon (Dept. of Agricultural Chemistry, Coll. of Agri., Kyung-pook National University) ;
  • Choi, Jyung (Dept. of Agricultural Chemistry, Coll. of Agri., Kyung-pook National University)
  • 장기철 (경북대학교 농과대학 농화학과) ;
  • 장상문 (경북대학교 농과대학 농화학과) ;
  • 최정 (경북대학교 농과대학 농화학과)
  • Published : 1987.12.30

Abstract

Soil samples were collected from the paddy soils growing two crops of rice and garlic in Kyung-pook province. To obtain the basic information on the application of S-fertilizer in the garlic field, the adsorption and release amount of $SO_4{^{-2}}$ in subsoil samples were determined. The ranges of $SO_4{^{-2}}$ contents in surface and sub-soil were 59-117 and 34-102 ppm, respectively. The amount of $SO_4{^{-2}}$ adsorbed by soil samples was found to be more at lower pH and higher concentration of $SO_4{^{-2}}$. The $SO_4{^{-2}}$ adsorption constants in Freundlich equation tended to be higher at lower pH. It is apparent that most of $SO_4{^{-2}}$ was released in the first extraction. However, the lower the pH of extracted solution, the more the $SO_4{^{-2}}$ contents was released by distilled water.

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