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Storage characteristics of watermelon before and after removing the T-shaped stalk

수박의 꼭지 제거여부에 따른 저장성

  • Kim, Nak-Ku (Gyeongnam Agricultural Research and Extension Services) ;
  • Chang, Young-Ho (Gyeongnam Agricultural Research and Extension Services) ;
  • Yu, Su-Pil (Haman Agriculture Technology Center) ;
  • Ha, Ki-Jeong (Gyeongnam Agricultural Research and Extension Services) ;
  • Je, Hee-Jeong (Gyeongnam Agricultural Research and Extension Services) ;
  • Hong, Kwang-Pyo (Gyeongnam Agricultural Research and Extension Services) ;
  • Lee, Sang-Dae (Gyeongnam Agricultural Research and Extension Services)
  • Received : 2015.02.02
  • Accepted : 2015.04.10
  • Published : 2015.04.30

Abstract

This study was carried out to compare the storage characteristics of watermelon (Citrullus lanatus) before and after removing the T-shaped stalk. For the investigation of the physiochemical properties of the watermelo, the watermelaon was stored at room temperature and $7^{\circ}C$, respectively. The average weight of the watermelon (7.8 kg) decreased by 0.6~0.7% at $7^{\circ}C$ and by 1.9~2% at room temperature during the storage period of 30 days. The hardness of watermelon reduced from 755 g to 542~549 g at room temperature for 30 days. However, the existence of T-shape stalk did not significantly affect on their weight and hardness. In addition, the pH, total acid content, and inner moisture of the watermelon were not significantly changed during the storage periods while the soluble solid at room temperature was significantly decreased from $11.3^{\circ}Brix$ to $9.3^{\circ}Brix$ after 30 days of storage. The internal redness of the watermelon decreased from 36.7 to 31.7~33.6. The total amount of its free sugar was increased from the original amount (8,133 mg/100 g) and then decreased. However, the stalk did not significantly affect on the amount of total free sugar under the same storage condition, too. Thus, there was no significant difference between the results of leaving the T-shaped stalk and removing it after harvesting the watermelon.

본 연구는 수박유통에 있어 수확시 꼭지를 T 형태로 자르는 관행적 방법과 꼭지를 제거할 경우 저장성에 미치는 영향을 구명하고자 수행되었다. 실험에 사용한 수박의 평균 무게는 7.8 kg이었고 각각 $7^{\circ}C$와 실온에 저장하면서 여러 요인들을 조사하였다. 무게는 저장일수가 길어짐에 따라 감소하였는데 꼭지처리한 수박을 $7^{\circ}C$에서 30일 저장한 경우 그 무게가 0.6~0.7% 감소한 반면 실온에서는 1.9~2% 감소하였으며 동일 온도조건하에서는 꼭지유무에 따른 유의차는 없었다. 경도는 초기 755 g에서 저장일수가 경과함에 따라 점차 감소하였으며 실온에서 저장하였을 경우 542~549 g으로 더 큰 감소폭을 보였으나 같은 온도조건하에서는 꼭지유무에 따른 차이는 없었다. 저장기간 동안 pH, 총산과 내부 수분은 모든 처리에서 큰 변화를 보이지 않았으며, 가용성고형분은 실온에 저장한 것은 초기 평균 $11.3^{\circ}Brix$에서 30일 후에는 $9.3^{\circ}Brix$로, 수박 내부의 적색도는 초기 36.7에서 저장후기에는 처리별로 31.7~33.6으로 감소하였으며, 유리당총량은 저장전 8,133 mg/100 g에서 초기에는 증가하다가 저장기간이 길어질수록 감소하였는데 이들 변화 역시 동일저장조건에서의 꼭지유무에 따른 유의적 차이는 나타나지 않았다. 따라서 수박을 수확할 때 꼭지를 T 형태로 남긴 것과 제거한 것이 저장성에 미치는 영향은 없으므로 생산, 유통 등을 고려하여 꼭지를 제거하는 것이 바람직하다고 판단된다.

Keywords

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