KOREAN JOURNAL OF CROP SCIENCE (한국작물학회지)

The Korean Society of Crop Science (한국작물학회)
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Influence of Fertilization Treatment using Organic Amendment based on Soil Testing on Plant Growth and Nutrient Use Efficiency in Potato

토양검정에 의한 유기자원 시비처방이 감자의 생육 및 양분이용효율에 미치는 영향

  • 임진수 (사단법인 흙살림연구소) ;
  • 이방현 (사단법인 흙살림연구소) ;
  • 강승희 (사단법인 흙살림연구소) ;
  • 이태근 (사단법인 흙살림연구소)
  • Received : 2020.08.22
  • Accepted : 2020.09.14
  • Published : 2020.12.01
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Abstract

In this study, we verified the effects of organic amendment application based on soil testing in potato cultivation. The application rate of organic amendments was determined based on the inorganicization rate of nitrogen, phosphoric acid, and potassium in the organic amendments. There was no significant difference in the length, stalk number, stalk diameter, and leaf color of potato plants under organic amendment application compared with those under chemical fertilization. The quantity of potato tubers and yield of marketable tubers under organic amendment application were higher than those under chemical fertilization. The top fresh weight and top-to-root ratio were the highest under organic amendment application, followed by those under chemical fertilization and the control. The inorganic nitrogen content in the leaves and stems of potato plants was the highest under chemical fertilization. There was no difference in the phosphoric acid content between the potatoes under chemical fertilization and those under organic amendment application. The potassium content in potatoes was higher under chemical fertilization than that under organic amendment application. While the change trend of inorganic nitrogen content in the roots was similar to that in the leaves and stems, the potatoes under organic amendment application, with the highest yield, showed the highest dry weight. The tuber weight showed a positive correlation with plant length, stalk number, and stalk diameter. The higher the weight of the tuber, the higher the weight of the marketable tuber, and the higher the top fresh weight, the higher the yield. Therefore, to increase yield, it is necessary to supply nutrients to improve the top fresh weight to the optimal level. There was no difference in the utilization efficiency of nitrogen and potassium between the potatoes under chemical fertilization and those under organic amendment application. The utilization efficiency of phosphoric acid was increased by 0.1% in potatoes under organic amendment application compared with that under other treatments. Regarding soil chemistry after harvest, the soils under organic amendment application showed a higher electrical conductivity and higher nitrogen and phosphoric acid content than those under other treatments. Therefore, the organic amendment method used in this study can be an alternative to chemical fertilization. It is also advantageous for the cultivation of subsequent crops in potato fields.

토양검정에 의한 유기자원 시비처방 효과를 구명하기 위하여 감자를 대상으로 포장시험을 실시하였으며, 유기자원 시비량은 유기자원의 질소, 인산, 칼륨 성분함량에 무기화율을 적용하여 결정한 결과를 요약하면 다음과 같다. 1. 질소 및 칼리의 이용효율은 화학비료와 유기자원처리의 차이가 없었으며, 인산의 이용효율은 0.1% 수준에서 유기자원구에서 높았다. 2. 감자 수확 후 토양화학성은 전기전도도, 질소 및 인산 함량이 유기자원구에서 높았다. 3. 감자 잎·줄기의 무기성분 중 질소 함량은 화학비료구에서 가장 높았고, 무처리구에서 가장 낮았다. 인산 및 칼륨 함량은 무처리구에서 가장 높았다. 인산은 화학비료구와 유기자원구의 차이가 없었고, 칼륨은 화학비료구에서 함량이 더 높았다. 4. 뿌리의 무기성분 함량도 잎·줄기에서와 같은 경향을 보였지만 건물중에 있어서는 수량이 많았던 유기자원구에서 가장 높았다. 5. 화학비료구와 유기자원구간 초장, 경수, 경경 및 엽색도는 차이가 없었지만 무처리구보다 높았다. 6. 괴경수량, 상서수량은 유기자원구에서 화학비료구보다 높은 경향이었으며 무처리구보다 높았다. 7. 지상부생체중과 T/R율은 유기자원구>화학비료구>무처리구 순이었다. 8. 초장은 경수, 경경, 괴경중, 상서중, 지상부생체중, T/R율 및 감자의 건물함량과 양(+)의 상관관계가 인정되었으며, 괴경중은 초장, 경수 및 경경과 양(+)의 상관관계가 인정되었다. 괴경중이 높을수록 상서중도 높았고, 지상부생체중이 높을수록 수량도 높은 양(+)의 상관관계가 인정되어 수량을 키우기 위해서는 지상부도 적정 이상으로 키우는 양분공급이 필요하다. 9. 이상의 결과를 볼때 본 연구에서 유기자원으로 처방한 시비방법은 화학비료대비 적정한 유기자원 처방법으로 활용가능하며, 후작물 재배에도 유리할 것으로 판단된다.

Keywords

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