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2017 Vol.26, Issue 2 Preview Page
Fruit Productivity and Cold Hardiness as Affected by Fruit Setting of ‘Wonhwang’ Pear Trees

‘원황’ 배의 착과량 조절이 과실생산성과 내한성에 미치는 영향

Byeong-Sam Kim1
,
Kyung-Chul Cho1
,
Kyung-Chul Ma1
,
Bong-Ki Yun1
,
Seok-Kyu Jung2
,
Hyun-Sug Choi2*
김 병삼1
,
조 경철1
,
마 경철1
,
윤 봉기1
,
정 석규2
,
최 현석2*
1Department of Research, Jeollanam-do Agricultural Research & Extebsuib Services, Naju-si, Jeollanam-do 58213, Republic of Korea
2Department of Horticulture, Catholic University of Daegu, 1313 Hayangro St., Gyeongsan-si, Gyeongsangbuk-do 38430, Republic of Korea
1전라남도농업기술원
2대구가톨릭대학교 원예학과
*Corresponding author: hchoiuark@gmail.com
30 April 2017. pp. 64-71
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Abstract

The study was performed on the effects of crop load of pear (Pyrus pyrifolia Nakai) trees on shoot growth, reserved nutrients, and fruit production for two years, as well as regrowth of cuttings treated with various cold temperatures in 2012 and 2013. Crop load adjustments included three levels of fruiting; 54 (60%), 90 (100%), and 126 fruits per tree (140%). As increasing crop load from 60% to 140%, water sprout growth decreased, and one-year old shoot resulted in declined concentrations of total carbon, macro-nutrients, and free sugar. The 140% of crop load greatly increased fruit yield of approximately 35 tons per ha in both 2011 and 2012 but slightly reduced weight, size, and soluble solid contents in fruit. However, 140% of crop load increased annual production income to approximately over 10 million won compared to the 60% and 100% of crop load. Germination rates in the cuttings did not rapidly decrease up to -20°C in a growth chamber condition. The 140% of crop load decreased germination rates less than 70% of cuttings grown under -30°C. Amounts of electrolyte leakage in the cuttings under various cold temperatures were not significantly different among the adjustment of crop load.

Keywords
free sugar
germination
leakage
mineral nutrients
Pyrus pyrifolia Nakai
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Information
  • Publisher :The Korean Society for Bio-Environment Control
  • Publisher(Ko) :(사)한국생물환경조절학회
  • Journal Title :Protected Horticulture and Plant Factory
  • Journal Title(Ko) :시설원예ㆍ식물공장
  • Volume : 26
  • No :2
  • Pages :64-71
  • Received Date : 2016-12-22
  • Revised Date : 2017-04-17
  • Accepted Date : 2017-04-24
  • DOI :https://doi.org/10.12791/KSBEC.2017.26.2.64
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