Polyacrylic Acid Sodium Salt의 혼합률이 상토의 화학성에 미치는 영향 Effect of Incorporation Level of Polyacrylic Acid Sodium Salt on Changes in Chemical Properties of Root Media
본 연구는 다양한 비율로 고흡수성 수지 polyacrylic acid sodium salt(PASS)를 상토에 혼합한 후 변화된 토양 화학성을 밝혀 작물재배를 위한 기초자료로 활용케 하기 위하여 수행하였다. 피트모스+버미큘라이트(1:1, v/v; PV), 피트모스+부숙왕겨(1:1, v/v; PR), 피트모스+부숙톱밥(1:1, v/v; PS), 그리고 피트모스+부숙수피(1:1, v/v; PB)의 네 종류 혼합상토를 조제하는 과정에서 PASS를 혼합하고 2,500mL의 플라스틱 포트에 충전하였다. 충전 5주 후에 측정한 상토의 pH는 모두 7.04~7.30 범위에 포함되어 너무 높았다. 네 종류 상토에서 PASS를 9.0gㆍℓ⁻¹로 혼합한 처리의 전기전도도가 가장 높고 처리 간 차이가 인정되었다. 그러나 직선 및 2차 곡선회귀가 성립하지 않아 뚜렷한 경향을 찾기 어려웠다. PASS의 혼합으로 네 종류 상토에서 인산농도가 뚜렷하게 상승하였고, K은 경향을 찾기 어려웠다. Ca⁺²은 PV, PS, 및 PB상토에서 토양농도가 높아졌고, Mg⁺²은 PV와 PB상토에서는 농도가 높아졌으나 PS상토에서는 경향을 찾을 수 없었다.
본 연구는 다양한 비율로 고흡수성 수지 polyacrylic acid sodium salt(PASS)를 상토에 혼합한 후 변화된 토양 화학성을 밝혀 작물재배를 위한 기초자료로 활용케 하기 위하여 수행하였다. 피트모스+버미큘라이트(1:1, v/v; PV), 피트모스+부숙왕겨(1:1, v/v; PR), 피트모스+부숙톱밥(1:1, v/v; PS), 그리고 피트모스+부숙수피(1:1, v/v; PB)의 네 종류 혼합상토를 조제하는 과정에서 PASS를 혼합하고 2,500mL의 플라스틱 포트에 충전하였다. 충전 5주 후에 측정한 상토의 pH는 모두 7.04~7.30 범위에 포함되어 너무 높았다. 네 종류 상토에서 PASS를 9.0gㆍℓ⁻¹로 혼합한 처리의 전기전도도가 가장 높고 처리 간 차이가 인정되었다. 그러나 직선 및 2차 곡선회귀가 성립하지 않아 뚜렷한 경향을 찾기 어려웠다. PASS의 혼합으로 네 종류 상토에서 인산농도가 뚜렷하게 상승하였고, K은 경향을 찾기 어려웠다. Ca⁺²은 PV, PS, 및 PB상토에서 토양농도가 높아졌고, Mg⁺²은 PV와 PB상토에서는 농도가 높아졌으나 PS상토에서는 경향을 찾을 수 없었다.
The objective of this research was to investigate the chemical properties of root media as influenced by incorporation rate of domestically produced hydrogel, polyacrylic acid sodium salt (PASS). To achieve this, the four root media such as peatmoss + vermiculite (1:1, v/v; PV), peatmoss + composted...
The objective of this research was to investigate the chemical properties of root media as influenced by incorporation rate of domestically produced hydrogel, polyacrylic acid sodium salt (PASS). To achieve this, the four root media such as peatmoss + vermiculite (1:1, v/v; PV), peatmoss + composted rice hull (1:1; PR), peatmoss + composted saw dust (1:1; PD) and peatmoss + composted pine bark (1:1; PB) containing PASS at the rate of 0, 3, 6, or 9 gㆍℓ⁻¹ were packed into a 2,500 ㎖ plastic pot. The media were analysed for chemical properties at five weeks after packing. The pHs at five weeks after treatment in four root media containing PASS were in the range from 7.04 to 7.30, which were too high. Elevated incorporation rates of PASS resulted in increase of soil solution EC in all root media with the highest EC value in the treatment of 9.0 gㆍℓ⁻¹. However, there were fluctuation in EC values among treatments and no consistent trends were observed. Elevated incorporation rate of PASS also resulted in increase of phosphate concentrations in all root media, but it did not affect K⁺ concentration. The Ca⁺² concentrations in PV, PS and PB media and the Mg⁺² concentrations in PV and PB media also increased as the incorporation rate of PASS were elevated, but Mg⁺² concentrations in PS medium were not affected by it.
The objective of this research was to investigate the chemical properties of root media as influenced by incorporation rate of domestically produced hydrogel, polyacrylic acid sodium salt (PASS). To achieve this, the four root media such as peatmoss + vermiculite (1:1, v/v; PV), peatmoss + composted rice hull (1:1; PR), peatmoss + composted saw dust (1:1; PD) and peatmoss + composted pine bark (1:1; PB) containing PASS at the rate of 0, 3, 6, or 9 gㆍℓ⁻¹ were packed into a 2,500 ㎖ plastic pot. The media were analysed for chemical properties at five weeks after packing. The pHs at five weeks after treatment in four root media containing PASS were in the range from 7.04 to 7.30, which were too high. Elevated incorporation rates of PASS resulted in increase of soil solution EC in all root media with the highest EC value in the treatment of 9.0 gㆍℓ⁻¹. However, there were fluctuation in EC values among treatments and no consistent trends were observed. Elevated incorporation rate of PASS also resulted in increase of phosphate concentrations in all root media, but it did not affect K⁺ concentration. The Ca⁺² concentrations in PV, PS and PB media and the Mg⁺² concentrations in PV and PB media also increased as the incorporation rate of PASS were elevated, but Mg⁺² concentrations in PS medium were not affected by it.
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