Korean Journal of Soil Science and Fertilizer (한국토양비료학회지)

Korean Society of Soil Science and Fertilizer (한국토양비료학회)
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Water Holding Capacity and Hydraulic Conductivity According to Compaction and Saturation Degree for Perlite amended with Ground Coir

압밀과 포화수준에 따른 분쇄 Coir 혼합 펄라이트의 수분보유력과 수리전도도

  • Kim, Gi-Rim (Dept. of Bioenvironmental Chem Coll of Agri and Life Sci. Chungnam National Univ.) ;
  • Woo, Hyun-Nyung (Dept. of Bioenvironmental Chem Coll of Agri and Life Sci. Chungnam National Univ.) ;
  • Kim, Hye-Jin (Dept. of Bioenvironmental Chem Coll of Agri and Life Sci. Chungnam National Univ.) ;
  • Park, Mi-Suk (Dept. of Bioenvironmental Chem Coll of Agri and Life Sci. Chungnam National Univ.) ;
  • Song, Jin-A (Dept. of Bioenvironmental Chem Coll of Agri and Life Sci. Chungnam National Univ.) ;
  • Song, Tae-Yong (Dept. of Bioenvironmental Chem Coll of Agri and Life Sci. Chungnam National Univ.) ;
  • Jang, Hyo-Ju (Dept. of Bioenvironmental Chem Coll of Agri and Life Sci. Chungnam National Univ.) ;
  • Chung, Doug-Young (Dept. of Bioenvironmental Chem Coll of Agri and Life Sci. Chungnam National Univ.)
  • 김기림 (충남대학교 생물환경화학과) ;
  • 우현녕 (충남대학교 생물환경화학과) ;
  • 김혜진 (충남대학교 생물환경화학과) ;
  • 박미숙 (충남대학교 생물환경화학과) ;
  • 송진아 (충남대학교 생물환경화학과) ;
  • 송태용 (충남대학교 생물환경화학과) ;
  • 장효주 (충남대학교 생물환경화학과) ;
  • 정덕영 (충남대학교 생물환경화학과)
  • Received : 2011.11.19
  • Accepted : 2011.12.08
  • Published : 2011.12.31
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Abstract

This investigation was performed to determine the hydraulic conductivity coefficient and water holding capacity for a specified compaction forces which are the amount of mechanical energy applied to the porous granule (PG) volume. Most current specifications of minerals and perlite as growth media require to be compacted to a specified density, which in general is equivalent to a certain percentage of laboratory compaction. The water holding capacity of the saturated PG was very large at potential above -1 bar compared with perlite, but very little water remained below this value. The water holding capacity and hydraulic conductivity characteristics of graded PG amended with the ground coir less than 2 mm in diameter were also determined from pressure outflow data. The saturated hydraulic conductivity of the saturated and compacted PG was slightly lower by more than one tenth order of magnitude at equal matric potentials of perlite, but when expressed on the basis of equal water deficits, the conductivity of PG was higher at all but the smallest deficits than those of perlite.

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References

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