Growth Characteristics and Changes of Pigment Content of Purple Sweet Potato during Growth

자색고구마의 생육특성 및 색소함량의 변화

  • Kim, Seon-Jae (Department of Food Engineering, Mokpo National University) ;
  • Rhim, Jong-Whan (Department of Food Engineering, Mokpo National University) ;
  • Lee, Lan-Sook (Department of Food Engineering, Mokpo National University) ;
  • Lee, Joon-Seol (Mokpo Experiment Station, Honam Agriculture Experiment Station) ;
  • Jeong, Byeong-Choon (Mokpo Experiment Station, Honam Agriculture Experiment Station)
  • 김선재 (목포대학교 식품공학과) ;
  • 임종환 (목포대학교 식품공학과) ;
  • 이란숙 (목포대학교 식품공학과) ;
  • 이준설 (호남농업시험장 목포시험장) ;
  • 정병춘 (호남농업시험장 목포시험장)
  • Published : 1996.12.30

Abstract

Growth characteristics and changes of pigment content of purple sweet potato (PSP) during growth were investigated. Vine length of PSP was increased to the maximum length of 130 cm after 100 days of growth. Numbers of branches and nodes were increased to the maximum of 21and 550, respectively, after 120 days of growth. Vine weight was also increased to the maximum of 4,384 kg/10a after 120 days of growth, while the weight of marketable root was increased continuously to the end of the growth period of 150 days to reach the production of 1,875 kg/10a. Uniquely considerable amount of anthocyanin pigment has been developed in both skin and flesh of young roots harvested after 40 days of growth. The pigment content was increased slowly until 140 days of growth then decreased. This fact indicates that the best time for harvesting of PSP is 140 days after planting.

Keywords

purple sweet potato;growth characteristics;pigment content