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Influence of Gypsum, Popped Rice Hulls and Zeolite on Contents of Cation in Reclaimed Tideland Soils in Mangyeong

새만금 간척지에서 석고, 팽화왕겨 및 제올라이트 처리가 토양 중 양이온 함량에 미치는 영향

  • Published : 2008.12.31

Abstract

Soil conditioner, such as $CaSO_4{\cdot}2H_2O$ (gypsum), popped rice hulls (PRH), and PRH with zeolite, were treated to the silt loam of Mangyeong in Saemangeum tideland reclaimed as 1550 (G1), 3100 (G2) and 6200 (G3) of gypsum kg/10 a, 1000(H1), 2000(H2), and 3000 (H3) of PRH kg/10 a, and 200 (HZ1), 400 (HZ2), 800 (HZ3) of zeolite kg/10 a added to 1500 PRH kg/10 a, respectively, each year until 2006 from 2004 for soil aggregation. Under these conditions with growing bermuda grass (Cynodon dactylon) it was analyzed cations in soil, such as $K^+$, $Na^+$, $Mg^{2+}$, and $Ca^{2+}$, at 60, 90, and 120 days after treatment (DAT) to research how soil conditioners influenced to change those contents in soils, respectively. The change of cations in soil was almost the same things as fine sandy loam that gypsum treated decreased remarkably contents of $K^+$, $Na^+$, $Mg^{2+}$ in soil. The change of $K^+$ content in soil by continuous using soil conditioners was gradually decreased in the order of 2004>2005>2006, regardless of the sorts and levels of soil treated conditioners, and $K^+$ content was high in the order of gypsum$Na^+$ content was high in the order of gypsum$Mg^{2+}$ content in soil was increased in the order of gypsum$Ca^{2+}$ content in soil was remarkably increased with continuous treatment of gypsum, and its level was in the order of 2004<2005<2006.

Keywords

Gypsum;Popped rice hulls;Zeolite;Aggregates;Soil Aggregation;Fine sandy loam;Silt loam;Cations

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