Horticultural Science & Technology (원예과학기술지)

Korean Society of Horticultural Science (한국원예학회)
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Effects of Urea Foliar Spray on Winter Defoliation, Shoot Growth and Fruit Setting in Satsuma Mandarin (Citrus unshiu Marc.)

요소 엽면시비가 온주밀감의 동계낙엽, 신초생장 및 착과에 미치는 영향

  • Han, Hae-Ryong (Dept. of Horticultural Science, Cheju National Univ.) ;
  • Kang, Jong-Hoon (Cheju Provincial Agricultural Technology Administration) ;
  • Oh, Hyun-Woo (Dept. of Horticultural Science, Cheju National Univ.) ;
  • Kang, Sung-Geun (Cheju Provincial Agricultural Technology Administration) ;
  • Park, Young Chul (Cheju Provincial Agricultural Technology Administration)
  • Published : 1998.12.31
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Abstract

This study was conducted to observe the effects of urea foliar spray to replace soil fertilization on defoliation ratio, shoot growth and fruit setting in satsuma mandarin (Citrus unshiu Marc.). Twice foliar sprays of 1% urea after harvest increased N and chlorophyll contents in leaves, and decreased defoliation during the winter season. The growth of the ovary and spring shoot was stimulated by the twice 0.8% urea foliar spray around the time of bud emergence. In addition, the treatments increased the number of flowers and fruit setting, but didn't influence fruit quality.

감귤재배에 있어 과다시용되고 있는 질소질비료의 시용량을 줄이고 수세를 건실하게 유지시키기 위하여 저온기에 시용되는 가을비료와 꽃비료를 요소 엽면시비로 대치, 그 효과를 검토한 결과 수확직후 1% 요소 2회 엽면시비는 엽중 N함량과 엽록소 함량을 증가시켰고, 동계낙엽율을 감소시켰다. 또한 발아전후 0.8% 요소 2회 엽면시비는 신초생장, 자방비대를 촉진시켰고 착화량과 착과수를 증가시켰다. 요소엽면시비에 따른 과실품질에는 차이가 없었다.

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Acknowledgement

Supported by : 제주대학교