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Aspects of Nutrient Transportation after Animal Manure Application in Jeju Field Soil

제주 밭토양에서 가축분 퇴비의 시용에 따른 양분의 이동양상

  • Published : 2004.09.30

Abstract

Recently, saw dust manure has been widely used in horticultural crop production in Korea. Animal manure is produced by decaying of livestock manure mixed with saw dust, and contained higher nutrients and ion concentration than the traditional manure made from rice straw and grasses. Therefore, a continuous application of the animal manure disregarding to soil characteristics may be ruined the soil conditions. This study was conducted to investigate the transportation of the nitrogen, phosphate, potassium, and ion concentration of the animal manure applied to volcanic and non-volcanic soils in Jeju islana Soil chemical analysis were done before and 180 days after animal manure application. After animal manure application, $NO_3$-N moved up to 90cm in volcanic soil, while the movement was limited to 60 cm in non-volcanic soil. Phosphate concentration was high up to 30 cm, where crop roots are mainly distributed, in volcanic soil, however, the phosphate moved up to 60 cm in volcanic soil. Exchangeable potassium moved up to 90 cm in volcanic soil, but the movement wns limited up to 60 cm in non-volcanic soil. For both soil types, no significant different in ion concentrations was observed up to 60 cm in soil depth, though the concentrations were higher in volcanic ash soils as compared to the non-volcanic ash soils.

가축분 퇴비의 연속적인 과디시용은 토양중의 각종 양분과 염류의 집적을 유도하여 토양의 악화를 초래 할 수 있다. 이러한 현상은 특히, 시설원예 재배지에서 발생하기 쉬운 것으로 알려져 있으나 퇴비 시용 후 퇴비유래 양분의 토양중 거동에 관한 연구는 미흡한 실정이다. 본 연구에서는 제주도에 주로 분포하고 있는 하산회토양(구좌통) 및 비화산회토양(애월통)에 시용한 가축분 퇴비(계분, 우분 및 돈분)의 질소, 인산, 칼리 및 염류의 토양중 거동을 파악하기 위하여, 토양시용 180일 후에 토층별($0{\sim}30$, $31{\sim}60$$61{\sim}90\;cm$)로 토양을 채취하여 토양화학성을 조사하였다. 가축분(계분) 퇴비 시용 후 질산태질소의 토양 중 거동을 검토한 결과 화산회토양의 경우, 질산태질소는 90 cm 범위의 토층까지 이동하였으나, 비화산회토양의 경우에는 $0{\sim}60\;cm$ 범위의 토층에 주로 분포하고 있었다. 인산의 경우, 화산회토양에서는 작물의 뿌리가 주로 분포하는 작토층 ($0{\sim}30\;cm$)에서 다량 검출되었으며, 화산회토양에서는 90 cm 범위의 토층에 까지 이동하였으나, 비화산회토양에서는 60 cm 범위의 토층까지 이동하는데 그쳤다. 토양의 염류농도의 경우 화산회토양에서는 주로 $0{\sim}60\;cm$ 범위에서 높은 농도로 검출된 반면, 비화산회토양에서는 토층에 따른 큰 차이를 인정할 수 없었을 뿐만 아니라, 화산회토양에 비하여 현저히 낮은 수준이었다.

Keywords

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