Status and Changes in Chemical Properties of Upland Soil in Gyeonggi Province

Abstract

The chemical properties of upland fields in Gyeonggi province were monitored every 4 years from 2001 to 2017 in order to provide basic information for soil fertility management of upland fields. In 2017, the soil chemical properties of upland fields were 6.3 in pH, 22 g kg -1 in organic matter (OM), and 651 mg kg -1 in available phosphate (Avail. P 2 O 5 ). Exchangeable (Exch.) potassium (K), calcium (Ca) and magnesium (Mg) were 0.83, 6.2 and 1.7 cmol c kg -1 , respectively, and electrical conductivity (EC) was 0.86 dS m -1 . In the long-term analysis, the contents of OM, Exch. Ca and pH of upland soils showed increasing tendency. However, the contents of Avail. P 2 O 5 tended to decrease, and there were no significant changes in the contents of Exch. K and EC. The optimal range of pH of upland fields changed to 45%

Status and Changes in Chemical Properties of Upland Soil in Gangwon Province between 2001 and 2017

“…역에서 조사(Roh et al, 2018)와 비슷한 경향을 보였는데, 토양의 pH가 높아지면 세포액의 농도에 부정적인 영향을 미치게 되어 식물생육에 지장을 초래하고, 염기성물질인 칼슘과 마그네슘 결핍을 야기한다. 또한 인산의 역할을 저해 하므로 밭토양의 산도 개선과 토양개량을 위한 석회질 비료를 사용하기 위해서는 토양 검정에 의한 석회 요구량을 산 (Roh et al, 2018)에 비해 유기물이 풍부해졌으나, 적정범위 미만 의 농가도 20% 이상 있으므로 이곳에 대해서는 유기물 증가를 위한 토양관리와 공급대책이 필요하다.…”