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칼륨 시비량에 따른 감나무 유목의 수체 부위별 무기원소 농도 및 과실 특성

Inorganic Element Concentrations in Different Organs of Young Persimmon Trees Received Different Levels of K Fertilization and Its Influence on the Fruit aracteristics

  • 최성태 (경상남도농업기술원 단감연구소) ;
  • 박두상 (경상남도농업기술원 단감연구소) ;
  • 손지영 (경상남도농업기술원 단감연구소) ;
  • 박여옥 (경상남도농업기술원 단감연구소) ;
  • 홍광표 (경상남도농업기술원 단감연구소)
  • Choi, Seong-Tae (Sweet Persimmon Research Institute, Gyeongnam Agricultural Research and Extension Services) ;
  • Park, Doo-Sang (Sweet Persimmon Research Institute, Gyeongnam Agricultural Research and Extension Services) ;
  • Son, Ji-Young (Sweet Persimmon Research Institute, Gyeongnam Agricultural Research and Extension Services) ;
  • Park, Yeo-Ok (Sweet Persimmon Research Institute, Gyeongnam Agricultural Research and Extension Services) ;
  • Hong, Kwang-Pyo (Sweet Persimmon Research Institute, Gyeongnam Agricultural Research and Extension Services)
  • 투고 : 2013.02.21
  • 심사 : 2013.05.04
  • 발행 : 2013.06.30

초록

단감의 품질을 높이기 위한 다양한 칼륨 시비방법이 감 재배 농업인들에 의해 시도되어 왔다. 본 시험은 칼륨 시비량이 단감나무의 부위별 무기원소 농도와 과실 품질에 미치는 영향을 구명하기 위해 수행되었다. 50 L 용기에서 재배한 6년생 '부유' 감나무에 7월부터 9월까지 3-4일 간격으로 염화칼륨을 사용하여 주당 K를 0(무시비구), 12, 25, 37, 66 g씩 관주하였는데, 무시비구는 시험 전 2년간도 K 비료를 공급하지 않았다. 11월에 잎, 과실, 신초 시료를 채취하여 조사하였다. 잎과 신초의 K 농도는 시비량 증가로 높아졌으며, 잎에서 변화가 특히 뚜렷하여 무시비구에서 0.49%였으나 37 g과 66 g 시비구에서 각각 3.09%과 3.11%로 높아졌다. 과실의 K 농도는 무시비구에서 현저히 낮았고 12 g 이상의 시비구들 간에는 차이가 없었다. 무시비구의 나무는 6월부터 가장자리부터 잎맥이 검게 괴사하는 잎들이 나타났고 8월에는 일부 잎이 가장자리부터 말라서 말리기도 하였다. 과실 특성에 미치는 K 시비량의 가장 큰 효과는 과중에서 나타났는데, 무시비구에서 150 g이었으나 12 g 시비구에서 181g, 37 g 시비구에서는 203 g, 66 g 시비구에서는 206 g으로 증가하였다. 과실의 경도, 당도는 K 시비량에 따른 유의적인 변화가 없었으며 무시비구는 적색도가 특이하게 높았다. 본 연구결과로 K 시비량에 대한 수체 부위별 반응이 다르며, K 시비량은 품질 요소 중 과실 크기에 주로 영향을 주는 것을 알 수 있었다.

BACKGROUND: Persimmon growers have often tried various regimens of K fertilization to improve fruit quality. This experiment was conducted to determine the effects of K rates on concentration of inorganic elements in different tree organs and on fruit characteristics. METHODS AND RESULTS: Six-year-old non-astringent 'Fuyu' persimmons, grown in 50-L pots, were used. Total K amounts of 0 (no-application), 12, 25, 37, and 66 g were fertigated to a pot with KCl solution at 3-to 4-day intervals from July to September. The 0 K trees received no K fertilizer for the two previous years. Leaves, fruits, and shoots were sampled in November. K concentrations in leaves and shoots increased significantly by increasing K rate; leaf K, 0.49% for the 0 K, increased to 3.09% for the 37 g and 3.11% for the 66 g trees. Fruit K was notably lower for the 0 K, but there were no significant differences among the trees as long as they were supplied with more than 12-g K. In the trees with 0 K, leaf necrosis in the margin was apparent in June and the symptom progressed toward the midrib. Some leaves scorch-rolled from the margin in August. The greatest effect of K rates was on fruit size; it significantly increased to 181 g for the 12 g, 203 g for the 37 g, and 206 g for the 66 g compared with 150 g for the 0 K trees. However, K rates did not affect firmness and soluble solids of the fruits. The fruits of the 0 K trees were characterized by better coloration. CONCLUSION(S): The K-rate effect on inorganic elements depended on tree organs and fruit size was the major parameter to be affected by the K rates.

키워드

참고문헌

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피인용 문헌

  1. Effects of different leaf-fruit ratios on uptake and partitioning of N and K in 'Uenishiwase' persimmon trees vol.212, 2016, https://doi.org/10.1016/j.scienta.2016.09.025
  2. Responses of Young 'Fuyu' Persimmon Trees to Summer Fertilization Rate and Leaf-fruit Ratio vol.49, pp.5, 2016, https://doi.org/10.7745/KJSSF.2016.49.5.577