Horticultural Science & Technology (원예과학기술지)

Korean Society of Horticultural Science (한국원예학회)
권호 표지

Effect of Girdling Dates on Dry Matter Increase and Reserve Accumulations in Permanent Parts of 'Nishimurawase' Persimmon Trees

환상박피 시기가 '서촌조생' 감나무의 영구기관 건물 증가와 저장양분 축적에 미치는 영향

Choi, Seong-Tae;Song, Won-Doo;Park, Doo-Sang;Kang, Seong-Mo
최성태;송원두;박두상;강성모

  • Published : 2009.06.30
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Abstract

This study was to evaluate the effects of girdling dates on dry matter (DW) increase and nutrient accumulations in permanent parts of 4- to 5-year-old 'Nishimurawase' persimmon (Diospyros kaki). Trees, grown in 70-L containers, were trunk-girdled to a 3 mm width on June 3, Aug. 3, and Sept. 3 in 2004 and 2005. The same girdling treatments were imposed to the same trees for two consecutive years. The trees were excavated on Oct. 28, 2004 and Nov. 17, 2005 for analysis. Calli were formed in more than 80% of the girdles in 30 to 45 days after the girdling; the wound healing was the slowest and visualized as incomplete in the Sept. 3-girdled trees. The girdling reduced the increase in DW more of the root than of the aerial woods; root DW decreased to 59% and 64% in 2004 and 74% and 56% of the control in 2005 by a June 3 and Sept. 3 girdling, respectively. Regardless of the dates, the girdling tended to reduce DW, carbohydrates, and inorganic elements of the roots, especially of the fine roots. The amount of root starch in June 3- and Sept. 3-girdled trees was 56% and 57% of the control in 2004, respectavely. In 2005, root soluble sugars and starch reduced mostly in Sept. 3-girdled trees to 52% and 46% of the control, respectively. Contents of root N, P, K, and Mg were the least in June 3-girdled trees in 2004 and in Sept. 3-girdled trees in 2005. There were no significant differences of inorganic elements in aerial woods in 2004, but P, K, and Mg contents were clearly reduced in Sept. 3-girdled trees in 2005. The consequences of the slow healing from a late girdling are discussed with regard to the susceptibility to winter injury, nutrient absorption, and tree growth.

본 연구에서는 환상박피 시기가 70L 용기에서 재배한 4~5년생 '서촌조생' 감나무의 부위별 건물중 분포와 저장양분 축적에 미치는 영향을 평가하고자 하였다. 같은 나무의 주간에 2cm의 간격을 두고 2004년과 2005년 6월 3일, 8월 3일 및 9월 3일에 3mm 폭의 환상박피 처리를 하였고, 생장이 끝난 후 나무를 굴취하여 분석하였다. 2년 모두 박피 후 30~45일이 지나면 80% 이상 유합되었지만, 9월 3일 처리구에서 가장 느렸다. 환상박피는 지상부 목질보다 뿌리의 건물중을 더 감소시켰는데, 6월 3일과 9월 3일 처리구는 1년차에는 각각 대조구의 59%와 64%, 2년차에는 74%와 56%로 적었다. 처리시기와 관계없이 환상박피한 나무의 뿌리, 특히 세근은 건물중 감소와 함께 탄수화물과 무기원소 함량의 감소가 뚜렷하였다. 2004년 뿌리의 탄수화물 함량은 6월 3일과 9월 3일 처리구에서 각각 대조구의 56%와 57% 수준이었고, 2005년에는 뿌리의 가용성당과 전분 함량이 9월 3일 처리구에서 각각 대조구의 52%와 46%에 불과하였다. N, P, K 및 Mg 함량 감소는 2004년에는 6월 3일, 2005년에는 9월 3일 처리구의 뿌리에서 가장 뚜렷하였다. 지상부 목질부의 무기원소 함량은 2004년에는 차이가 없었으나 2005년에는 9월 3일 처리구의 P, K 및 Mg 함량이 유의적으로 적었다. 늦은 시기의 환상박피는 동해 위험성을 높일 뿐 아니라 뿌리 생장을 지나치게 감소시킬 수 있어 장기적인 수세 감소와 함께 나무의 영양원소 불균형을 유발할 가능성이 있음을 지적하였다.

Keywords

References

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