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임경빈,임웅규,황종서,Im, Hyong Bin,Lim, Ung Kyu,Hoang, Chong Ser 한국생태학회 1977 Journal of Ecology and Environment Vol.1 No.1-2
The growth of red and black pines in Muan, Seochen, Gapyeong and Kochang areas was compared by means of the growth of annual ring width and stem analysis to study the process of damages caused by pine needle gall midge. Red pine forest of Seocheon area began to suffer by pine needle gall midge from 1961 and the damage was to becoming severe from 1967. The damage became so intense tha tmany forests are withering to death from spring of 1975. Black pine forest also began to suffer from 1973. Red pine forest of Muan area was supposed to be suffered from 1973. Red pine forest of Kochang area suffered by pine needle gall midge from 1967. It seems that the damage became severe from 1973 and that black pine forest was also badly damaged from that time. Red pine forest of the control plot, Gapyeong area, began to suffer from 1967 and it also became intense from 1973. Although the areas of Seocheon, Muan, Kochang, and Gapyeong are different from each other in terms of locality and the infitration period of pine needle gall equally from 1967 due to mass development of population or other factors and the damage became more intense from 1973. Black pine forest was also badly damaged from that time. Black pine seems to be stronger in insect resistant than red pine. This can be justified by the fact that it began to suffer belatedly in each area and the degree of damage is moderate. The damage of Seocheon area is the severest following Kochang. Muan area is relatively moderate but the forest becoming decrease in growth.
간척지에서 수도 (水稻) 및 기타작물의 내염성에 (耐鹽性) 관한 연구 - 13. 간척지에서 수도의 (水稻) 무기양분 흡수와 쌀 성분에 관하여
임경빈(Hyong Bin Im),심재욱(Jai Wook Shim),임웅규(Ung Kyu Lim) 한국식물학회 1971 Journal of Plant Biology Vol.14 No.1
In order to observe the absorption pattern of mineral elements and the nutritional components of brown rice grown in reclaimed saline areas in Korea, the four commercial varieties of rice were culturad at the average salt concentration of 6.05 mmhos/㎝, 25℃, (0.3%) in saline soils and non-saline silty loam soils. In the saline areas the absorption of Na and Si was relatively high while the absorption of P, K and Ca, was relatively low. N was absorbed actively before the emergence of the rice grains but showed relative decrease thereafter. There was no difference in Mg content. Though brown rice in the saline areas contained sugar abundantly with small contents of protein, fat and crude fiber. There was little difference in total carbollydrate and ash contents.
간척지에 있어서의 사탕무우 재배에 관한 기초적 연구 - 1. 간척지에서 사탕무우의 당축적에 (糖蓄積) 관하여
임경빈(Hyong Bin Im),황종서(Chong Ser Hoang) 한국식물학회 1977 Journal of Plant Biology Vol.20 No.1
In order to investigate the possibility of sugar beet culture in reclaimed area of our country and the salt tolerance of sugar beet, a variety Kawemegapoly was used for experimentation in plots of various salt concentration arranged in Kimpo reclaimed area located at Kyongkido Province. The salt concentration of cultivating layer of the field in the west coast of Korea began to decline from the middle of June and rises again in the middle of October growing season of sugar beet as generally seen in relaimed paddy fields of Korea. The soil of less than 0.5% salt concentration is most suitable for the culture of sugar beet has very strong salt tolerance. The sugar accumulation of sugar beet in each plot declined once in the middle part or in latter September and began to proceed again from the early of October. Such temporary retrocession of sugar accumulation was observed.
수도냉해의 (水稻冷害) 발생기구와 그의 대책에 관한 연구 - 제1보 수도의 생장과 무기양분흡수에 미치는 온도의 영향
임경빈(Hyong Bin Im),오윤진(Yun Jin Oh) 한국식물학회 1975 Journal of Plant Biology Vol.18 No.1
Seedlings of Nongbaek representing strong cold tolerant variety of rice plant, Jinheung of medium variety and Tongil of weak variety were used respectively for the present study. These seedlings were water cultured in phytotron which maintained at the daytime and night temperature of 30-25℃, 20-20℃, 20-15℃ and 15-10℃. The growth rate of plant height, tillering rate, increase in dry weight and absorption pattern of important mineral nutrients at their early growth stage under each temperature conditions were observed. Generally, it appeared that Nongbaek was more active in the growth of plant height than Jinheung, and Jinheung was more active than Tongil under low temperature condition. The tillering rate of these three varieties was equally rapid while it was decreased in the order of weak cold tolerant variety, such as Tongil, Jinheung and Nongbaek as the temperature declined gradually. The dry weight increasing curve showed almost the same pattern in the varieties at the treatment of each temperature. Under low temperature conditions, Nongbaek showed higher absorption rate of N per dry weight and higher absorption amount of per plant body, Jinheung followed and Tongil was the lowest. The absorption amount of P_2O_5 increased in the top part compared with the roots as temperature rose and decreased as temparature declined. There seemed to be no difference of absorption among the varieties which have different cold tolerance each other. Under low temperature the absorption rate of K per dry weight was high, as a whole, especially Nongbaek was markedly higher than the other two. The absorption rate of Ca, Mg and Fe was also equally high in all varieties under low temperature and Nongbaek showed a more absorptive tendency in the absorption amount under low temperature.
간척지에서 수도 및 기타 작물의 내염성에 관한 연구 - 15. 간척지에 재배한 수도 엽층의 수광 효과에 미치는 염분의 영향
임경빈(Hyong Bin Im),임웅규(Ung Kyu Lim),황종서(Chong Ser Hoang) 한국식물학회 1971 Journal of Plant Biology Vol.14 No.3
In order to observe the factors affecting light utilization efficiency in the canopy of a rice crop grown in reclaimed saline areas in Korea, 22 varieties of rice were cultured at the average salt concentration of 6.05mmhos/㎝ 25℃, (0.39%) in saline soils and non-saline silty loam soils. The inhibition of tillering ability by salt damage at the maximum tillering stage was greater than to growth in height. A significant direct correlation was observed between both ratios and salt concentration with each variety. In the salty areas the length of the flag leaf of the maturing stage showed a positive correlation with the production of rough rice while other living leaf showed a negative correlation. LAI of maturing stage was less in the salty area than in the non-salty area, while the former showed higher ratio in net assimilation and translocation to head with greater RGR before and after the heading stage.
임경빈(Hyong Bin Im),황종서(Chong Ser Hoang) 한국식물학회 1970 Journal of Plant Biology Vol.13 No.4
The rice variety, Kwanok, was reared in the water, land and salt seed beds and transplanted to the reclaimed soil area having an average of 0.48% salt content(0.67% at the end of April). The plant height of land bed seedlings at transplanting stage was short but the dry-weight/plant-height ratio was large and the rooting ability was vigorous remarkably after transplantation in the salty area. The central cylinder, vessels, sclerenchyma, endodermis and other mechanical tissues of the root of land bed seedlings were well developed while the size of cortical cell layers were small. The cytoplasm of the cortical parenchyma at the root tips seemed to be most abundant in the land bed seedlings. The formation of the aerial cavity in the cortex of primary root was rapid and it seemed that the developmental mechanism of the aerial cavity in the rice plant roots was related to the development of the lateral roots.
간척지에서 수도 (水稻) 및 기타작물의 내염성에 (耐鹽性) 관한 연구 ( 제10보 ) - 간척지에서 재식밀도와 (栽植密度) N 수준 (水準) 변동에 대한 수도개체군의 반응에 관하여
임경빈 (Hyong Bin Im) 한국식물학회 1970 Journal of Plant Biology Vol.13 No.3
Field studies were conducted with Kusabue variety and factorial design of 12 treatments composed of 3 levels, 10 ㎏, 15 ㎏ and 20 ㎏ of N per 10 a, and 4 levels of 80, 100, 120, and 140 hills per 3.3 ㎡ plot in reclaimed salty area having an average of 0.48 % salt concentration. The law of spacing effect was observed in the increase of the number of stems at any application levels of N, and the increased N application exceeding 15 ㎏ N per 10 a did not increase the number of stems in maximum tillering stage. The light recieving efficiency of plant population was greatly reduced by close planting when compared with the effect of increased N applications in heading stage. The spacing effect on the C/F ratio was not noted but was reduced markedly by the increased N applications, accordingly the spacing effect on rough rice yields to the LA was less than by the increase N application. Closer spacing increased the number of panicle, and non-effective stems, decreased the number of grains per panicle and panicle weight. The increased N applications also increased the number of panicle, reduced the weight of 1,000 grains and the ratio of matured grains. It is recommended to plant 100 hills per 3.3㎡ with the application of 15 ㎏ N per 10 a in the reclaimed salty area of Korea.
간척지에서 수도 (水稻) 및 기타작물의 내염성에 (耐鹽性) 관한 연구 - 12. 육묘와 수묘의 염분간척지에서의 내염성에 관하여
임경빈(Hyong Bin Im),황종서(Chong Ser Hoang) 한국식물학회 1970 Journal of Plant Biology Vol.13 No.4
The rice variety, Kwanok, was reared in the water and land beds and transplanted to the reclaimed soil area, having an average salt concentration of 0.39%. Two levels of the moderate and late season cultures with 4 treatments were used. The K and Si contents of the stem part of land bed seedlings were somewhat smaller, but total carbohydrate remarkably larger, the C/N ratio was accordingly greater than water bed seedligs. The rooting ability of land bed seedlings was vigorous markedly in culture solutions, to which added various concentrations of NaCl, The rooting ability of each seedling was not much declined in the culturing solution of up to 9.4mmhos/㎝, (0.6%) of salt concentration, but it was drastically declined in the salt concentration over that. It seemed that the critical salt concentration for the rooting of rice plant. The land bed seedlings in each salty condition markedly decreased compared with the water bed seedling in transpiration rate and it showed a stronger drought resistance and contained a large amount of chlorophyll at transplanting stage, and also showed higher stability of chlorophyll at rooting stage in the salt treatment. The number of panicles, panicle weight, number of grains per panicle and ratio of matured grains of the rice plant grown by the land bed seedlings were much greater and 1,000 grain weight was less than from water bed seedling. The cultural practices with the land bed seedlings increased the rough rice yields by 15% and 11%, respectively, compared with the yields of the moderate and late season cultures by water bed seedlings.
간척지에서 수도 (水稻) 및 기타작물의 내염성에 (耐鹽性) 관한 연구 - 6. 염분간척지에서 직파법과 (直播法) 이앙법 (移秧法) 에 의한 수도생육의 (水稻生育) 비교
임경빈(Hyong Bin Im),임웅규(Ung Kyu Lim) 한국식물학회 1970 Journal of Plant Biology Vol.13 No.1
The Nongkwang variety was sown directly in the field by the three methods of dibbling, drill seeding and broad-casting in non-, low- and high-salty areas, and compared with the growth of transplanted rice in each areas. The yield of rough rice wat increased remarkably by direct sowing when compared with that produced by transplanting in both salty areas, but in non-salty area, the former was decreased significantly. There was no significant difference in the yields of rough rice resulting from three seeding methods of direct sowing in each area. The direct sowing method was predominated in number of panicie, weight of panicle, ratio of matured grains, milling recovery percentage, and straw weight in both salty areas, and dicreased in panicle weight and ratio of matured grain in nonsalty area.
간척지에서 수도 (水稻) 및 기타작물의 내염성에 (耐鹽性) 관한 연구 - 7. 염분간척지에서 수도의 (水稻) N 시비의 (施肥) 변동에 따르는 P 와 K 의 반응에 관하여
임경빈 (Hyong Bin Im) 한국식물학회 1970 Journal of Plant Biology Vol.13 No.2
The rice variety, Nongkwang was used iu two factorial experiments with the combination of 15 ㎏ and 20 ㎏ of H per 10 a, 3 levels of P_2O_5 (0,4 and 8 ㎏ per 10 a) and 4 levels of potash (0,2,4 and 8 ㎏ per 10 a) in the reclaimed soil areas containing 0.48% of the average salt content througrout the year (0.67% at the end of April). The absorption of N, K and Ca was accelerated by increased N applications. The absorption of P itself was not enhanced by the increased application of P_2O_5 but the absorption of K_2O reduced the absorption of Mg was affected. The increased application of K_2O reduced the absorption of Si and seemed to increase the content of carbohydrate in the rice plants. Twenty ㎏ of N and 4 ㎏ of P_2O_5 per 10 a produced satisfactory yields of rough rice, potash applications are ineffective in this experiment on rice grain production.