Korean Journal of Soil Science and Fertilizer (한국토양비료학회지)

Korean Society of Soil Science and Fertilizer (한국토양비료학회)
권호 표지

Effect of Application Added Phosphorus and Potassium for Potato and Chinese Cabbage in Mounded Highland Soil

고랭지 성토지에서 감자 및 배추에 대한 인산과 칼리 증시 효과

  • Received : 2002.08.30
  • Accepted : 2002.09.18
  • Published : 2002.12.30
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Abstract

This study was conducted to investigate the changes of soil properties for potato and Chinese cabbage after application adding phosphorus and potassium fertilizers in the mounded highland soil from 1999 to 2001. Experimental plots were designed with control(NPK+Lime+Compost) and chemical improvement(Control+Application adding P and K). Mounded soil before field experiment of first year(1999) was low in organic matter, available phosphorus and exchangeable potassium, and the soil texture was loamy sand soil. After 3 years, the contents of soil organic matter increased a little, and available phosphorus and exchangeable potassium contents were remarkably increased. The crop growth in chemical improvement plot was better than control plot. Yield of chemical improvement plot in comparison with control plot was increased by 5~22% for potato and 6~25% for Chinese cabbage after 2~3 years.

표고 750m인 고랭지에서 마사토의 일종인 척박한 모재토를 채취하여 1.5m로 두텁게 성토한 포장조건에 인산증시, 유기물 및 석회질비료 등을 혼용하였을 때 토양화학성분 함량의 변화와 수량성을 검토하기 위하여 1999년에서 2001년까지 3년간 포장시험으로 수행하였다. 유기물, 유효인산 및 치환성칼륨 등 화학성분 함량이 매우 낮은 양질사토인 토양에 감자 "수미"와 배추 "고랭지 여름배추"를 여름재배하였다. 연차의 경과에 따른 토양의 유효인산과 치환성칼륨 함량은 인산 및 칼리질비료의 증비로 증가하였으며, 특히 3년차에서 현저히 증가한 반면, 유기물 함량은 완만한 증가를 나타내었다. 작물 재배지에 모재토(C horizons) 성토시는 매년 표준량의 퇴비연용 및 석회중화량 시용(감자는 더뎅이병 발생 경감을 위하여 1/2량 시용)과 병행하여 토양검정에 의한 인산(흡수계수 5% 조절량) 및 칼리(포화도 5% 조절량)를 증비하는 화학성 개량만으로도 2~3년내 조기 숙전화가 가능함을 알았다. 토양의 유효인산과 치환성칼륨 함량의 증가가 컸던 화학성 개량구의 2~3년차 수량증가율은 표준구에 비하여 감자 5~22%, 배추 6~25% 이였다. 감자 및 배추의 3년차 건물중은 표준구에 비하여 모두 높았고, 생육도 전반적으로 양호한 결과로 나타났다.

Keywords

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