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딸기의 수확 후 CO<sub>2</sub>처리와 모의 수출과정 중 상품성 변화
이학재,김기철,박일용,황용수,Lee, Hak-Jae,Kim, Ki-Cheol,Piao, Yi-Long,Hwang, Yong-Soo 충남대학교 농업과학연구소 2002 농업과학연구 Vol.29 No.1
본 연구는 수출용 딸기에 대한 실용적 $CO_2$ 처리방안을 도입하여 수출단계에서 과실 품질에 미치는 영향을 조사하기 위하여 실시하였다. $CO_2$ 처리에 따른 경도 증진 효과는 과숙한 과실에서 더욱 컸으나 과실의 실제적인 경도는 미숙한 과실에서 높아 미숙과에 대한 처리 효과가 실용적인 가치가 있었다. 처리조건은 수확한 과실을 예냉실에 넣어 냉각시키고 15% 이상의 $CO_2$에 4시간 이상 노출시키는 것이 바람직 하였으며 $CO_2$ 처리의 잔류효과는 모의 선적 및 소매과정까지 유지되었다. 그러나 과숙한 과실에서는 소매과정을 부여할 때 과피면이 검붉게 변하여 상품가치를 상실하였다. 본 연구 결과에서 농가 소유의 소형 저온실을 활용하여 간편하게 $CO_2$를 처리할 수 있으므로 수출은 물론 국내 유통에서 품질 증진을 위한 수확 후 처리기술로 활용 가능성이 있었다. This experiment was conducted to improve the market quality of fresh strawberries through postharvest treatment of $CO_2$ at commercial level. Postharvest application of $CO_2$ increased flesh firmness regardless of ripeness of strawberries. Firmness further increased in berries of full maturity but the actual firmness was higher in less mature berries. The optimal condition of $CO_2$ treatment was above 15% of $CO_2$ for 4 hours during cooling of harvested fruit. Residual effect of firmness increase was remained until simulated shipment as well as retail condition for 1 days at ambient temperature. Market quality of full ripe fruit at harvest significantly reduced due turning skin color to dark red and dryness of physically injured surface. Result indicated that a short term application of $CO_2$ during cooling has a benefit for keeping freshness of strawberries during export and local marketing.
MH(Maleic hydrazide)처리가 포도 부초 생장억제 및 품질에 미치는 영향
박일용,김기철,황용수,이재창 충남대학교 농업과학연구소 2002 농업과학연구 Vol.29 No.1
Spray of maleic hydrazide (MH) was confirmed to be highly effective on the inhibition of lateral shoot growth regardless of grape cultivars and application concentration examined in his experiment. The optimal spray times were 30 days after full bloom in 'Kyoho' and 35 days in 'Campbell Early'. However, the optimum season of application should be adjusted depending on the vine vigor. The apical buds of lateral shoot was significantly affected at the concentration of 3,900 ㎎·L^-1 resulting in the death and/or abscission. Thus the optimal concentration of MH seemed to be 1,950 ㎎·L^-1. The inhibition effect by MH application was derived from the decrease of node number and length. No adverse effect on fruit quality was found by MH application. In contrast, there was a tendency of anthocyanin increase in 'Campbell Early' grapes. Results indicated that MH could be an effective agent to reduce the labor charge through the inhibition of later shoot growth.