Korean Journal of Organic Agriculture (한국유기농업학회지)

Korean Association of Organic Agriculture (한국유기농업학회)
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Effect of Shade Levels on Growth and Fruit Blight of 'Campbell Early' Grapes

포도 '캠벨얼리' 차광수준이 수체생장과 열매마름 증상에 미치는 영향

  • Received : 2018.08.10
  • Accepted : 2018.12.05
  • Published : 2019.02.28
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Abstract

The study I was initiated in six private 'Campbell Early' vineyards in parts of Jeollanam-do province to relieve symptom of fruit blight mostly due to a high temperature occurred in Summer. High percentage of fruit blight was observed for medium growth of grape trees non-irrigated. In the study II, grape trees treated with 0%, 30% and 60% shade films were investigated for the tree responses, including fruit blight symptom in the research plots. Harvesting time was advanced approximately two weeks by the 30% shade treatment. High percentage of shades increased total shoot length per tree and decreased shoot diameter, with the greatest number of shoots observed for the 30% shade-treated grapes. Light intensity in the tree canopy was approximately 26% decreased by 30% shade treatment. Marketable harvested fruits per tree were 50.6 of 30% shade treatment, 33.6 of 0% shade, and 42.8 of 60% shade. The 30% shade treatment decreased to 11.8% of cluster blight per tree and to 11.2% of berry blight per cluster. The 30% shade treatment increased cluster weight, berry weight, soluble solid contents, and anthocyanin contents.

시험I은 여름철 고온에 의하여 발생되는 열매마름 증상 경감 대책을 마련하기 위하여 전라남도 일부 지역의 '캠벨얼리' 6개 포도과원을 중심으로 실태조사를 하였다. 열매마름 발생비율이 높은 과원은 주로 관수를 하지 않은 수세가 중간인 곳에서 관찰되었다. 시험II는 포도나무 수관 전체를 차광망을 씌워서 차광수준을 0%, 30%, 60%로 하여 과실마름 증상 등을 포함한 수체 반응을 조사하였다. 수확 시기는 30% 차광으로 0% 차광보다 2주일 정도 앞당겨졌다. 차광량이 증가하면 신초장은 길어지고 신초경은 가늘어지는 경향을 보였고, 신초수는 30% 차광에서 가장 많았다. 수관의 조도는 30% 차광에서 약 26% 감소가 관찰되었다. 상품성이 있는 수확 과방수는 30% 차광처리에서 주당 50.6송이로 0% 차광(주당 33.6송이)과 60% 차광(주당 42.8송이)보다 높은 수확량을 보였다. 열매마름 과방과 열매마름 과립률은 30% 차광처리에서 각각 11.8%와 11.2%로 가장 낮았다. 30% 차광처리는 과방중과 과립중, 당도, 안도시아닌 함량을 증가시켰다.

Keywords

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