한국유기농업학회지 (Korean Journal of Organic Agriculture)

  • 제24권4호
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  • Pages.773-786
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  • 2016
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  • 1229-3571(pISSN)
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  • 2287-819X(eISSN)
한국유기농업학회 (Korean Association of Organic Agriculture)
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포도갈색무늬병 발병수준이 '켐벨얼리' 유기포도의 광합성률에 미치는 영향

Photosynthetic Rates of 'Campbell Early' Organic Grape as Affected by Degree of Leaf Spot Disease Caused by Pseudocercospora vitis

  • 류영현 (경상북도농업기술원 유기농업연구소) ;
  • 배수곤 (경상북도농업기술원 유기농업연구소) ;
  • 연일권 (경상북도농업기술원 유기농업연구소) ;
  • 김광섭 (경상북도농업기술원 유기농업연구소) ;
  • 박상조 (경상북도농업기술원 농업환경과) ;
  • 박준홍 (경상북도농업기술원 농업환경과) ;
  • 박종호 (국립농업과학원 유기농업과)
  • 투고 : 2016.08.16
  • 심사 : 2016.10.05
  • 발행 : 2016.11.30
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초록

포도 캠벨얼리품종은 우리나라 포도재배면적의 70%를 차지하고 있으며 다른 품종에 비해서 갈색무늬병에 대해서 감수성으로 병 발생이 심할 경우 과실당도의 저하를 가져와 품질하락과 생육불량 등의 문제점을 발생시킨다. 이러한 켐벨얼리 포도품종에서의 갈색무늬병에 의한 생육피해 해석을 위해서 7년생의 유기재배 켐벨얼리 품종대상으로 2015년 8월에 갈색무늬병이 발병된 포도나무를 대상으로 광합성 효율 특성, 엽록소함량 및 감염잎의 화학성분 등을 비교분석하였다. 갈색무늬병 감염면적이 증가함에 따라서 $CO_2$ differential value (기준기와 분석기 $CO_2$ 농도차이), WUE value (광합성수분사용효율)와 A value ($CO_2$의 흡수율/호흡률) 등은 크게 감소하는 경향이었으며 stomatal conductance value (기공전도도)은 큰 영향이 없는 것으로 조사되었다. 총 엽록소의 함량은 병징이 심할 경우 50% 이상 감소하여 엽록소 함량의 감소가 포도갈색무늬병 발병잎의 광합성 효율 저하에 큰 영향을 끼치는 것으로 생각되며 병반면적률에 따른 화학성분을 조사한 결과 병반면적률이 증가할수록 잎의 질소, 인산, 칼륨 함량은 감소하였으며 반면에 총탄소, 칼슘 그리고 마그네슘의 함량은 병반면적률에 비례해서 증가하였다.

Grape cultivar "Campbell Early" account for 70% of table grape in Korea and Leaf Spot Disease caused by Pseudocercospora vitis is one of a major disease in greenhouse and field grown area during late summer season in both of organic and conventional grape farm. Leaf spot disease can cause lowing of sugar content in fruit and vine growth and very difficult to control especially in organic field. Photosynthesis ability and chemical components are compared between leaf spot disease infected leaves with degree of necrotic area. With increase of disease necrotic area, $CO_2$ differential value, water use efficiency and $CO_2$ assimilation and respiration ratio are decreased proportionally and on the other hand, stomatal conductance value is not affected by disease necrotic area. Chlorophyll contents are also decreased by 50% in heavily infected leaves and imply decrease of chlorophyll contents is a major source of photosynthesis ability decline. With increase of disease necrotic area in leaves, total nitrogen and phosphate contents are decreased and on the other side, total carbon, potassium, calcium and magnesium contents are increased. From this research, we can infer that not only chemical control program is important in control of leaf spot disease but also fertilizing program is significant especially in organic agronomical control of fungal disease in grape cultivar "Campbell Early".

키워드

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