온도와 이산화탄소의 상승처리가 포도 ‘캠벨얼리’의 수체생육과 과실품질에 미치는 영향

The effects of elevated temperature and CO₂ concentration on vine growth and characteristics of fruits of three-year-old ‘Campbell Early’ grapevine were investigated. The treatment groups consisted of a control group (ambient temperature and 390 ㎕·L -1 CO₂), an elevated temperature group (ambient temperature + 4.0℃ and 390 ㎕·L -1 CO₂), an elevated CO₂ group (ambient temperature and 700 ㎕·L -1 CO₂), and an elevated CO₂/temperature group (ambient temperature + 4.0℃ and 700 ㎕·L -1 CO₂). The average shoot length was 312.6 ㎝ in the elevated CO₂/temperature group, which was higher than the other groups; with 206.2 ㎝ in the control group and 255.6 ㎝ and 224.8 ㎝ in the elevated temperature group and elevated CO₂ group respectively. However, the shoot diameter showed a tendency of decreasing in the elevated temperature and elevated CO₂/temperature groups. The equatorial diameter of berries was increased in the higher carbon dioxide concentration, and the soluble solid content was the highest in the elevated CO₂ group, with 14.6 °Brix among all treatment groups and the lowest in the elevated temperature group (13.9 °Brix). The harvest date was approximately 11 d earlier in the elevated CO₂/temperature group and 4 to 2 days earlier in the elevated CO₂ group and elevated temperature group, respectively. Regarding the rate of photosynthesis and transpiration during the growth period, higher photosynthetic rates were observed in the elevated CO₂ group and the elevated CO₂/temperature group during the early stage of growth; however the photosynthetic rate was reduced dramatically in summer, which was contrary to transpiration.