Soil Chemical Properties of Peach Orchard and Nutrient Content of Peach Leaves In Gyeongbuk Area

경북지역 복숭아 과수원 토양 화학성 및 복숭아 엽의 양분함량 조사

  • Received : 2002.06.08
  • Accepted : 2002.06.25
  • Published : 2002.06.30

Abstract

Soil chemical parameters of peach orchards and the concentration of nutrients in peach leaves were investigated. Results of soil analysis showed that pH value and content of exchangeable calcium was quite low, required to adjust soil acidity in many investigated soils. Nitrogen and phosphorous contents in leaves were founded to be excessive comparing to RDA's optimal levels(N $29.3{\sim}35.9g\;kg^{-1}$, P $1.7{\sim}2.2g\;kg^{-1}$), while calcium contents were lower than optimal levels($11.2{\sim}21.0g\;kg^{-1}$) in many sites and Potassium content was higher in peach cultivars than nectarine cultivars. Correlation analysis revealed that organic matter contents in subsoils and exchangeable calcium content in soils(top and subsoil) were increased with cultivation year, but available phosphate contents in subsoils were decreased. Organic matter and exchangeable magnesium contents in top soils were positively correlated with potassium and magnesium contents in leaves, whereas were negatively correlated with calcium contents in leaves, impling antagonistic absorption of calcium against potassium and magnesium. The findings indicated that most of soils ought to managed to adjust soil acidity and application amount of nitrogen, phosphorous fertilizer and compost should be controlled properly.

복숭아 주산지역인 청도, 영덕, 영천지역 60개 과원을 대상으로 토양의 화학적 특성 및 엽중 양분함량을 조사하였다. 표토의 pH는 평균 4.8정도로 비교적 낮은 편이었고, 치환성 칼슘함량은 $3.66cmol^+kg^{-1}$, 석회 요구량은 $3,970kg\;ha^{-1}$정도였다. 산간지 토양이 평야지에 비해 석회요구량이 많았고 치환성 칼륨 및 마그네슘함량이 높았으며 양토에서 석회요구량이 가장 많았고 유효붕소함량은 양토와 사양토에서 높았다. 경작년수가 증가함에 따라 심토의 유기물함량, 표토와 심토의 칼슘함량이 증가하였고 심토의 유효인산 함량은 감소하였다. 복숭아 엽중 질소와 인산함량은 적정범위에 비해 높았고 칼슘함량은 적정범위에 비해 낮았으며 유명, 창방조생등의 품종이 천홍, 선광등 nectarine 계통에 비해 칼륨함량이 높았다. 토양 유기물함량과 식물체의 칼륨함량과 정의 상관, 칼슘함량과는 부의 상관이었고 치환성 마그네슘함량과 식물체의 칼슘함량과는 부의 상관, 마그네슘함량과는 정의 상관이었다. 따라서 경북지역 복숭아 과원은 토양산도의 교정, 퇴비, 질소 및 인산질 비료의 사용을 적절히 조절할 필요가 있는 것으로 판단된다.

Keywords

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