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환상박피 시기가 ‘서촌조생’ 감나무의 영구기관 건물 증가와 저장양분 축적에 미치는 영향
최성태(Seong-Tae Choi),송원두(Won-Doo Song),박두상(Doo-Sang Park),강성모(Seong-Mo Kang) 한국원예학회 2009 원예과학기술지 Vol.27 No.2
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 ㎜ 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.
이흥수,정부근,김태성,권진혁,송원두,노치웅,Lee, Heung-Su,Chung, Bu-Keun,Kim, Tae-Sung,Kwon, Jin-Hyuk,Song, Won-Doo,Rho, Chi-Woong 한국응용곤충학회 2009 한국응용곤충학회지 Vol.48 No.4
단감에 피해를 일으키는 노린재의 피해양상을 밝히기 위해 접종시기별, 접종밀도별 피해과율을 조사하였다. 톱다리개미허리노린재에 의한 피해과율은 접종밀도, 접종시기, 먹이조건에 따라 유의하게 차이가 있었으며 결과모지당 5마리 접종구에서부터 피해를 보이며 접종시기에서는 6월, 7월, 8월에는 피해가 적었으며 9월, 10월에 피해과가 많아졌다. 단감을 단일먹이로 한 것과 강낭콩과물을 제공한 먹이조건에서의 피해과율에서 유의하게 차이가 있었다. 톱다리개미허리노린재에 의한 피해과는 흡즙흔적이 있는 식흔과로 남으며 흡즙에 의한 낙과증상은 없었다. 썩덩나무노린재는 7월, 8월, 9월의 접종시기별 피해과율이 유의하게 차이가 있었으며 접종밀도에 따른 피해과율에 유의하게 차이가 있어 5마리 처리구에서는 7월의 경우 100%의 피해과율을 보였다. 갈색날개노린재의 접종시기에 따른 피해과율은 유의한 차이가 없었고 접종수준에 따른 피해과율은 1마리, 3마리, 5마리에서 각각 유의하게 차이가 있었다. 피해증상으로 톱다리개미허리노린재와 달리 7월, 8월에는 피해를 받은 과일이 대부분 낙과되었으나 9월 이후의 피해과는 낙과되지 않고 식흔과가 많았다. This study was conducted to investigate the fruit damage according to the number of released stink bugs and date of adult introduced on non-astringent persimmon. The fruit damage differed significantly by the number, date, and the source of feed for Riptortus clavatus. Damages on the fruits appeared when five bugs were released to mother branches bearing fruits. Damages to the fruits was heavy in the case that bugs were introduced in September and October, compared with in June, July and August. Persimmon fruit damage was influenced significantly by the available sources to R. clavatus, persimmon fruit alone or additional supply of kidney bean (Phaseolus vulgaris) and water. Characteristic damage symptoms by R. clavatus showed only scars on the fruit skin, without fruit dropping. Halyomorpha halys (=mista) showed significantly higher fruit damage when they were released in July, August, and September compared with other periods. Number of H. halys to the fruit also showed significant differences in fruit damages. Five H. halys in July showed 100% damaged fruits. The fruit damage by Plautia stali was not significantly different according to dates of introduction but the number of insects gave significant differences in the fruit damage ratio at the level of 1, 3, 5 bugs introduced to the mother branche bearing friuts. The damage symptoms by P. stali was fruit dropping in July and August but from September damaged fruits were found in the branches.