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Effect of Occurrence of Scion Root on the Growth and Root Nutrient Contents of 'Shiranuhi' Mandarin Hybrid grown in Plastic Film House

자근발생이 부지화 감귤나무의 수체 생육과 뿌리내 양분함량에 미치는 영향

  • Kang, Seok-Beom (Citrus Research Institute, National Institute of Horticultural & Herbal Science, Rural Development Administration) ;
  • Moon, Young-Eel (Spokesperson office, Rural Development Administration) ;
  • Yankg, Gyeong-Rok (Citrus Research Institute, National Institute of Horticultural & Herbal Science, Rural Development Administration) ;
  • Joa, Jae-Ho (Citrus Research Institute, National Institute of Horticultural & Herbal Science, Rural Development Administration) ;
  • Han, Seong-Gap (Citrus Research Institute, National Institute of Horticultural & Herbal Science, Rural Development Administration) ;
  • Lee, Hae-Jin (Agricultural Bigdata Division, Planning and Coordination Bureau, Rural Development Administration) ;
  • Park, Woo-Jung (Department of Marine Food Science and Technology, College of Life Sciences, Gangneung-Wonju National University)
  • 강석범 (농촌진흥청 국립원예특작과학원 감귤연구소) ;
  • 문영일 (농촌진흥청 대변인실) ;
  • 양경록 (농촌진흥청 국립원예특작과학원 감귤연구소) ;
  • 좌재호 (농촌진흥청 국립원예특작과학원 감귤연구소) ;
  • 한승갑 (농촌진흥청 국립원예특작과학원 감귤연구소) ;
  • 이혜진 (농촌진흥청 기획조정관실 농업빅데이터일자리팀) ;
  • 박우정 (국립강릉원주대학교 생명과학대학 해양식품공학과)
  • Received : 2019.07.15
  • Accepted : 2019.09.03
  • Published : 2019.09.30

Abstract

BACKGROUND: 'Shiranuhi' mandarin is a major cultivar among all late ripening type of citrus, and is widely cultivated in Korea. However, many farmers have reported scion root problems in their orchard resulting in reduced flowering and fruiting. It is necessary that the physiology of scion-rooted 'Shiranuhi' mandarin trees is further understood. METHODS AND RESULTS: This experiment was conducted to understand the growth response and physiology of scion-rooted 'Shiranuhi' mandarin hybrids. In our study, 'Shiranuhi' mandarin trees were divided into two groups: trees without scion roots (control) and trees with scion roots. The experiment was conducted in Seogwipo of Jeju, with ten replicates for each group. Growth of trees with scion roots was more vigorous and the trees were taller than the controls. Tree height and trunk diameter of scion-rooted trees were significantly higher than those of control trees. Exposed length of rootstocks of scion-rooted trees was significantly lower (by about 2 cm) than that of control trees (8.6 cm). In terms of root nutrition, carbon contents of scion-rooted trees was significantly lower than that of control trees, but nitrogen and potassium concentrations in scion roots were significantly higher than those in control roots. CONCLUSION: Based on the results, we infer that growth of scion-rooted trees was very vigorous and the content of nitrogen in these roots was higher than that in the control tree roots. Thus, the carbon/nitrogen ratio of scion roots was significantly lower than that of the control roots.

Keywords

C/N ratio;Growth;Nutrition;Scion root;'Shiranuhi' mandarin

Acknowledgement

Supported by : Rural Development Administration

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