뽕나무의 휴면유기 및 타파요인 분석

남학우(Hack Woo Nam),류근섭(Keun Sup Ryu),성규병(Gyoo Byung Sung) 한국잠사학회 2000 한국잠사학회 잠사과학 100주년 국제심포지엄 및 추계학술대회 Vol.- No.-

水耕液中의 供給窒素形態에 따른 桑樹의 이온 吸收와 器官別 分布에 關한 硏究

李?周(Won-Chu Lee),柳根燮(Keun-Sup Ryu) 한국토양비료학회 1982 한국토양비료학회지 Vol.15 No.4

뽕나무 신소의 발근력 생성시기에 대하여

성규병(Gyoo Byung Sung),구태원(Tae Won Goo),김호락(Ho Rak Kim),류근섭(Keun Sup Ryu) 한국잠사학회 1997 한국잠사곤충학회지 Vol.39 No.2

慶北地方의 뽕밭에 發生한 發芽不良現象의 原因 및 防除에 關한 硏究

柳根燮,金圭來,金洛相 한국잠사학회 1986 한국잠사곤충학회지 Vol.28 No.2

This study was conducted to bring light on inducing factors for non-sprouting occured in the mulberry field of Kyungpook Province in 1983. The results are as follows; 1. In spring, winter buds were suddenly died during germination, necrosis appeared in phloem and cortex of non-sprouting stem and measles at the bottom of non·sprouting stem. 2. The depth of available of soil was more shallow in the non-sprouting field than in healthy field. 3. There was no significant difference between the healthy field and non-sprouting field in siol PH, the content of organic matter, available phosphorous and exchangeble cations. 4. Available boron content in soil was significantly more in healthy field than in non-sprouting field. 5. Boron content in leaf and bark was significantly lower in the non-sprouting tree than in the healthy tree. 6. The non-sprouting fields were completely controlled by the application of 6kg/10a borax. 7. Cold tolerance of the mulberry tree was higher in the mulberry tree with boron than in the mulberry tree without boron. 8. Mulberry tree in Kyungpook Province in 1983 may absorb water earlier compared with the average year because of high temperature at the end of March, 1983 and they had been damaged by frost injuary due to the lowest temperature (-6.4°c) on the grass at the beginning of April 1983. As the above results, non·sprouting bud in the mulberry field of Kyungpook Province in 1983 had been occured by low temperature and boron deficiency and boron deficiency of mulberry trees accelerared the frost injury.

뽕나무의 耐寒性에 關한 硏究(Ⅱ) : 短期高溫 및 低溫處理가 休眠枝條의 耐寒性에 미치는 效果 Rapid Effect of High and Low Temperature on the Freezing Resistance of Dehardening Stems

柳根燮,朴基燦 慶北大學校 1992 論文集 Vol.52 No.-

This study explored the rapid effect of low temperature on the freezing resistance of dehardening and hardening stems of mulberry cultivars. 1. The short low temperature treatment showed hardy freezing resistance to mulberry winter bud in early spring. 2. The high temperature treatment showed less freezing resistance to mulberry stems and the longer high temperature treatment, the lesser freezing resistance in early spring. 3. Mulberry stems treated at -5℃ for 24 hours during November were not showed any freezing damage and the more late November, the more hardened freezing resistance. 4. Yongchunppong was the most hardy freezing resistance cultivar.

칼슘이 뽕나무 뿌리의 발육과 가지의 내동성에 미치는 영향

류근섭,최영철 한국잠사학회 1997 한국잠사곤충학회지 Vol.39 No.1

Effects of calcium on mulberry growth and freezing tolerance were examined by water culture. Calcium was supplied by falar spray with the levels of 0, 5, and 40 ppm. Mulberry stems developed by 130cm at Ca2+ 40 ppm, 82 cm at Ca2+ 5 ppm and 23 cm at Ca2+ 0 ppm. Mulberry roots also developed vigorously at Ca2+ 40 ppm, but did poorly at Ca2+ 5 ppm and changed to brown in color, and died becoming necrosis at Ca2+ 0 ppm. Content of calcium in leaves and barks were increased at Ca2+ 40 ppm compared. with at Ca2+ 5 ppm. Total sugar, RNA, proline and phospholipid at Ca2+ 40 ppm were also more inreased than those at Ca2+ 5 ppm. Mulberry stems grown at Ca2+ 40 ppm showed a sufficient tolerance at -10 for 24 hours while stems grown at Ca2+ 5 ppm did a weak tolerance at the same conditions.

필리핀 벤규트의 고지대 뽕밭현황 및 개선방안

류근섭 慶北大學校農業科學技術硏究所 1996 慶北大農學誌 Vol.14 No.-

필리핀의 잠사업은 그 역사가 매우 짧다. 1974년 일본의 잠업기술을 도입하면서부터 양잠에 관심을 갖기 시작하였다. 그 후 1990년 한국의 잠업기술자의 도움을 받아 뽕밭을 조성하고 잠실을 지어 양잠을 본격적으로 시작하게 되었다. 따라서 이 나라의 잠업역사가 짧은 것 만큼 뽕나무 재배기술도 몹시 낙후되어 잇는 실정이다. 필리핀 고지대의 뽕밭의 현황 및 그 개선책을 요약하면 다음과 같다. 강우량, 기온, 일조시간 및 습도 등은 뽕나무가 자라는데 큰 무리가 없어 보인다. 다만 12월부터 3월까지의 건기에는 뽕밭에 관수를 하거나 뽕밭 주위에 무진장으로 자생하고 있는 풀을 베어서 뽕밭에 피복하여 토양수분을 보존한다. 대부분의 뽕밭이 급경사지에 조성되었는데 등고선에 따라 계단을 만들거나 승수로의 설치등이 되어 있지 않기 때문에 강우시에는 토양의 침식 및 유실이 심하였다 따라서 계단 사면에는 초생재배를 실시하고 계단면에는 유기물을 피복하여 토양의 유실을 방지해야 할 것이다. 토양의 pH 4.7, 유기물함량 1.6%, 유효인산함량은 6ppm이었다. 즉 유기물 함량이 낮은 강산성토양이며 유효인산함량이 극히 낮은 토양이었다. 석회와 유기물을 다량 사용하여 토양을 개량하고 인산비료를 증시해야한다. 소나무 밑에서 재배하고 있는 뽕밭에서는 햇빛이 잘 쪼일 수 있도록 소나무의 곁가지를 전정해주고 석회를 증시한다. 현재의 ha당 시비량 질소-46kg, 인산-18kg은 너무 적은 양이므로 ha당 질소-250kg, 인산-120kg, 칼리-120kg을 사용한다. 전체 뽕밭의 70%에 해당하는 뽕나무가 뽕나무 잎말이 나방피해를 받고 있는 실정인바 DDVP 및 KAFIL 등의 약제 방제를 실시한다. 우기에 많이 발생하는 적삽병은 이병된 뽕잎과 새순은 조기 제거하고 Topsin-M을 살포한다. The Studies were conducted to provide the state of mulberry cultivation and it's development in Banguet province (high land) of Philippines. Philippines initiated the sericulture industry with the technical asistance of Japan in 1974 and established mulberry field and sericultural facilities with technical asistance of Korea in 1990 and 1995. The required average of 100 to 150㎜ per month is not available during the dry season from December to March. Therefor mulching with grass which is available abundantly in the Philippines should be established to conserve moisture, to control soil erosion, surface ran-off and also to increase the humus content in the soil. In chemical properties of mulberry field, the pH value of soil is 4.7, organic matter 1,6%, and available phosphorus 6ppm. Therefore, all fields should do liming and be applied compost. To improve leaf yield for mulberry planted under partial shade area of pine trees, more pruning of pine tree should be done for good sunshining of mulberry, more liming and compost should be applied to improve acidic soil. To control the leaf roller, DDVP and KAFIL are able to be used. When spraying insecticides to control mulberry insect pests, care should be taken to consider the residual effects of chemicals on the leaf. Leaf should be fed to silkworms only after the leaves are free of any residual effects.

窒素 및 生長調節劑 處理에 의한 뽕나무의 蛋白質, 核酸含量 및 休眠의 變化

柳根燮,南鶴祐,崔營哲 한국잠사학회 1993 한국잠사곤충학회지 Vol.35 No.2

Winter dormancy of the mulberry (Morus species) in Suwon was investigated with regards to mulberry varieties, such as Kaeryangppong, Daeryugppong, Yongcheonppong and Hongolppong application of fertilizers and growth hormone. In general, It initiated at late September and it subsequently became deeper and reached the highest degree through late October to early November. After that early November it gradually turned into the breaking state and was terminated by late November. Intensity and duration of dormancy were lower and shorter in Kaeryangppong. The standard application of N. P. K(30-13-18 kg/10a) affects it delayed, but terminated earlier. On the other hand, the double amount of nitrogen affects the dormancy fast, but terminated late. The treatments of GA3 at the early and termination stages increased the bad sprouting. The contents of RNA and protein in the bark gradually increased as the dormancy becomes deeper.

뽕나무 體內 主要 無機成分의 季節的 消長에 關한 硏究

崔營哲,柳根燮,李梡周,安永熙 한국잠사학회 1993 한국잠사곤충학회지 Vol.35 No.2

This study was carried out to understand the seasonal changes in mineral contents of mulberry trees. The shoot barks and the leaves of three mulberry varieties (Kaeryangppong, Shinilppong, Yongcheonppong) were analyzed every 10 days during the year from January to December of 1993. Phosphorus content of the shoot barks and leaves gradually decreased until October in three varieties and increased thereafter. Especially, that of Yongcheonppong decreased 0.18% from 1.33% in January to 1.15% in October. Potassium content of the shoot barks increased 0.7~1.1% from April to August but decreased 0.7~0.9% during winter. That of the leaves increased from May to October. Magnesium content of the shoot barks increased until August but decreased after then. And it increased again after October. That of the leaves decreased from May to October. Calcium content of the shoot barks decreased 0.4~O.6% from January to September but increased 0.1~0.4% from October. That of the leaves increased from May to October.

월동 및 해동기 뽕나무의 생화학적 물질의 변동과 내동성과의 관계

최영철,류근섭,안영희 한국잠사학회 1997 한국잠사곤충학회지 Vol.39 No.1

In relation to cold acclimation, experiment was carried out to understand the seasonal changes in reserve substances of the mulberry. The shoot barks and leaves of three mulberry varieties(Kaeryangppong, ShiniIppong and Yongcheonppong) were sampled, after that their reserve substances were analyzed. The cold hardiness of mulberry was investigated by DTA(Differential Thermal Analysis) method. To increase cold hardiness, gibberellin(100 ppm), kinetin(100 ppm) and Jambi 8 were sprayed on the mulberry leaves. After spraying, falling of the leaves of Yongcheonppong occurred earier than the other varities. After the first frost, all of treatments except gibberellin were entirely fallen. Growth regulator extended the leaves fallen. After spraying, water of the shoot barks was not showed difference in the content among the treatments, but amino acid, carbohydrate and soluble protein increased from September to October. Starch content of the shoot barks and leaves was maximum in October, but thereafter decreased during wintering stage. In Shinilppong, Jambi 8 spray increased cold hardiness by 1~2°C more than no spray. It was concluded that the cold hardiness of the mulberry in midwinter is closely related to the reserve substances with spraying Jambi 8 on the mulberry leaves.