PROPERTIES IMPROVEMENT AND HYDROPHOBICITY PREVENTION OF PEAT SOIL IN OIL PALM PLANTATION THROUGH STEEL SLAG APPLICATION

  • Winarna Winarna Indonesian Oil Palm Research Institute
  • Iput Pradiko Indonesian Oil Palm Research Institute
  • Muhdan Syarovy Indonesian Oil Palm Research Institute
  • Fandi Hidayat Indonesian Oil Palm Research Institute
Keywords: hydrophobisity, steel slag, peat soil, oil palm

Abstract

Development of oil palm plantation on peatland was faced with hydrophobicity problem caused by over drained. Hydrophobicity could reduce water retention and nutrient availability in the peat soil. Beside of proper water management application, addition of soil ameliorant which contain iron could increase stability and improve peat soil fertility. The study was conducted to obtain the effect of steel slag on peat soil properties and hydrophobicity. In this study, peat soil was incorporated with steel slag and incubated in 60 days period. The research was employed completely randomized design (CRD) factorial 2 x 2 x 4. First factor is peat maturity consists of two levels: sapric (S) and hemic (H), while the second factor is soil moisture which also consist of two levels: field capacity (W1) and dry (under the critical water content) (W2). The third factor is steel slag dosage which consist of four levels: 0 g pot (TB0), 7.17 g pot (TB1), 14.81 g -1 -1 pot (TB2), and 22.44 g pot (TB3). The result showed that application of steel slag significantly increase of soil pH, ash content, and water retention at pF 4.2. Furthermore, application of steel slag significantly reduce time for water reabsorption (wettability) in sapric. On the other hand, there are negative corellation between water penetration and soil pH, ash content, and water retention at pF 4.2. Overall, application of steel slag could increase wettability and prevent peat soil hydrophobicity.

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Author Biographies

Winarna Winarna, Indonesian Oil Palm Research Institute
Iput Pradiko, Indonesian Oil Palm Research Institute
Muhdan Syarovy, Indonesian Oil Palm Research Institute
Fandi Hidayat, Indonesian Oil Palm Research Institute
Published
2016-04-01