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이욱(Uk Lee),정명석(Myung Suk Jung),백을선(Eul Sun Baik) 한국양봉학회 2009 韓國養蜂學會誌 Vol.24 No.4
Six main chestnut cultivars potentially useful as mother trees for two cultivars (‘Jahong’ and ‘Jangwon’) containing high soluble solids content as pollinizers were evaluated for their flowering times, fruiting setting, nut characteristics, and disease and insect resistance. Staminate flowering of main chestnut cultivars, whose flowering period ranged from June 10 to 26, coincided with the full blooming period of pistillate flower of ‘Jahong’ and ‘Jangwon’ cultivars. The main chestnut cultivars generally showed the high value of 79% for fruit setting, also had resistance to insect and disease. For nut characteristics including high soluble solids content, it showed good characteristics in ‘Daebo’ as a mother tree pollinated with ‘Jahong’ and in ‘Tanzawa’ and ‘Mipung’ as mother trees pollinated with ‘Jangwon’. Therefore, as mother trees pollinated with the cultivars containing high soluble solids content, we predict that ‘Daebo’ for ‘Jahong’ and ‘Tanzawa’ and ‘Mipung’ for ‘Jangwon’ could be promising.
밀원수종 흑오미자 제주도 선발집단의 입지환경 및 개화·결실 특성
김세현(Sea Hyun Kim),이갑연(Kab Yeon Lee),백을선(Eul Sun Baik) 한국양봉학회 2010 韓國養蜂學會誌 Vol.25 No.1
To propose basic information for natural resource management and using for honey plant of Schisandra nigra Max., its habitat environment and vegetation structure of forest communities growing the species was investigated. Fourteen plots (each plot size 400m2) were set up at the distributed area of Jeju island, southern part of Korea. S. nigra is the economic useful species that scatteringly grows at 850~920m in the western part, at 660~710m in the northern part and at 750~1,250m in the southern part of Mt. Halla. Soil pH range of S. nigra natural habitat showed 4.36~5.28. Also, cation exchange capacity (CEC) and ratio of organic matter showed 16.70±3.83 m.e/100g and 22.81±2.85%, respectively. Those value are higher than general forest soil in Korea. The community of S. nigra in Mt. Halla is the mixed secondary forest of pine and broad leaved trees that are mainly composed of Pinus densiflora, Quercus serrata, Styrax japonica, Lindera erythrocarpa and Carpinus laxiflora. The density in a main distribution sector of S. nigra appears in the range of 3~39 individuals per each 20×20m plot. The association analysis showed that the following tree species were positively associated with S. nigra. In other words, the following tree were appeared to require the same ecological niche together with S. nigra, Lindera erythrocarpa, Cornus waltri, Acer mono, and Styrax japonica. Blooming and fruiting of the natural habitat of S. nigra were significant by a region. The most superior region was Youngsil in the western part and Kwaneumsa in the northern part of Mt. Halla. However, Sanghyo in the southern part was lower than the other regions in the survival rates of a female flower and a quantity of a attached fruit.
배재수(Jae Soo Bae),김외정(Wae Jung Kim),박경석(Kyung Seok Park),백을선(Eul Sun Baik) 한국산림과학회 2000 한국산림과학회지 Vol.89 No.1
The purpose of this study is to examine the status of supply-demand and procurement of the timber used for wooden cultural properties. Because people require the high quality pine timber with cultural assurance and public function for cultural properties, it is priced far higher than ordinary construction timber, The timber consumption was estimated at 18 thousand cubic meter in 1998, of which the large sized log(LSL) with the small end diameter over 30㎝ consisted of 35.5%, equivalent to 6,300 cubic meter. Majority of the timber was supplied from private forest located in Kangwon-do and national forest, accounting for 65.7% and 16.7%, respectively. Recently the supply more and more relied on timber logged in Kangwon-do. Owing to lack of domestic supply of LSL class timber, part of the volume has been substituted by import log. Most of carpenters working on cultural properties thought that supply of LSL timber would hardly meet the increasing demand for uses of wooden cultural properties. Finally, in order to uphold the tradition of wooden cultural properties, it is necessary to establish a forest management plan which aim at producing large size high quality pine timber.
강문수(Moon-Su Kang),한진규(Jingyu Han),김세현(Sea-hyun Kim),이갑연(Kab-Yeon Lee),백을선(Eul-Sun Baik) 한국양봉학회 2009 韓國養蜂學會誌 Vol.24 No.3
In this study, we examined the effect of pollinators on the fruiting of Korean black raspberry. The pollination, fruiting and the cracking fruit rate were investigated in the one group that was blocked the access of insects and the other group which was exposed freely by insects. The results of experiment showed that the average of pollination rate was 97% in the exposed treatment while it was 53% in the enclosed treatment. The fruiting rate was 90% in the exposed treatment and 32% in the enclosed treatment. The cracking fruit rate was 13% in the exposed treatment and 63% in the enclosed treatment. There was a significant difference in the weight of the harvested Korean black raspberry, depending on the access of pollinators, which was 1.3±0.2g in the exposed treatment and 0.9±0.1g in the enclosed treatment. Based on that, the rate of dependence on pollinators of Korean black raspberry was estimated at 0.76 which was relatively high. Hymenoptera (61%) comprised the largest number of pollinators in the Korean black raspberry flower blooming season, followed by Diptera (25%), Lepidoptera (10%), and Coleoptera (4%). In addition, the results of investigation on the activities of honeybees in Korean black raspberry flowers showed that they were the most active at 09:00 and 15:00.