山地果樹의 栽植을 爲한 爆藥利用에 關한 硏究

柳順昊(S. H. Yoo),高光出(K. C. Koh),朴武彦(M. E. Park) 한국토양비료학회 1980 한국토양비료학회지 Vol.12 No.4

밭土壤의 物理性과 加里

柳順昊(S. H. Yoo) 한국토양비료학회 1977 한국토양비료학회지 Vol.10 No.3

爆藥에 依한 果樹園土壤의 物理性改良에 關한 硏究

柳順昊(S.H.Yoo),高光出(K.C.Koh),趙永吉(Y.K.Cho) 한국토양비료학회 1979 한국토양비료학회지 Vol.11 No.2

水稻에 對한 燐酸 및 窒素質肥料의 效用에 關한 硏究

金浩植(H. S. Kim),趙伯顯(B. H. Cho),李春寧(C. Y. Lee),李殷雄(E. W. Lee),沈相七(S. C. Shim),柳順昊(S. H. Yoo),權容雄(Y. W. Kwon),曺在星(J. S. Jo) 한국토양비료학회 1968 한국토양비료학회지 Vol.1 No.1

山地 果樹園에서 發生하는 矮性 사과나무의 發育不振과 枯死現象의 原因究明과 對策을 위한 基礎硏究(Ⅱ)

柳順昊,朴武彦,高光出 서울대학교농과대학농업개발연구소 1989 서울대농학연구지 Vol.14 No.1

Physical and chemical properties of soils of non-cultivated zone between plant standings were analyzed to elucidate their effects on the internal bark necrosis of dwarf apple tree grown on the newly reclaimed highland. Leaf analysis was also made to seek any relationship between nutritional balance in the leaf and the degree of peeling-off known as self-curing symptom of internal bark necrosis. The orchard of dwarf apple tree was 11 years old and established on Osan sandy loam soil (coarse loamy mesic family of Typic Dystrochrepts). The results are summarized as follows: 1. Roots of the dwarf apple tree were distributed more in horizontal direction than vertical direction and root mass in the soil decreased logarithmically with increase of soil hardness. 2. Available phosphated and boron content of the soils in the non-cultivated zone between plants showed positive correlation with trunk diameter, cannopy width, and fruit setting of the apple tree, while Mg and Mn contents were negatively correlated with cannopy width and fruit setting. 3. Fruit setting rate and size of apple were increased with the degree of bark peeling-off (the symptom of bark necrosis recovery). However, the symptom was not necessarily related to nutrient contents of leaf and branch bark. 4. Soil moisture contents determined in situ one day after the rain-fall varied with sites and the moisture data showed that the higher the moisture content, the lighter the growth retardation and necrosis symptom. 5. Leaf analysis for nutrient contents showed that N, K and Ca were in optimum level, B and P in lower level than optimum, and Mn in excessive level respectively. 6. Organic matter and available phosphate contents of the studied soil were lower than national average value of apple orchard soil. However, potassium content of the soil was higher than the national average.

山地 果樹園에서 發生하는 矮性 사과나무의 發育不振과 枯死現象의 原因究明과 對策을 위한 基礎 硏究(I)

高光出,柳順昊,朴武彦 서울大學校 農科大學 1986 서울대농학연구지 Vol.11 No.1

In order to find out the causes of the growth-retardation by the soil-enviromental and physiologically unbalanced conditions in the dwarf apple trees. relationships between nutrient concentration in leaf and soil growth characters were studied on the combination of three and two varieties of stocks and scions. respectively. in the ten-year-old orchard established on Osan silt loam(Co-arse loamy mesic family of Typic Dystrochrepts). The results are summarized as follows: 1. Basic growth characters representing the past growing history such as tree height canopy width and trunk thickness were remarkably taller broader and thicker in the normal trees than in the retarded ones with physiological abnormal symptom. However yearly changeable growth characters like shoot length number of the fully developed leaves and fruit setting rate were better in abnormal trees in normal ones because of the recent intensive improvement of fertilization for the growth-retarded trees. 2. Basic growth difference between normal and abnormal trees was largest in M26 smallest in MM106. 3. Although the contents of N. P. K. Ca and Mg in leaf were at standard level, two nutrients. B and Mn particulary in the leaf of abnoumal tree, were quite lower and higher, respectively, than the general standard level for the good growth of apple trees. 4. Surface soils had higher pH and nutrient concentration than subsoil because of successive surface fertilization. 5. Growth status was negatively correlated with the concentration of nutrients in soil and leaf because of improper fertilization to have been applied at the same amount of fertilizer regardless of age or vigour of trees. 6. Deep soiling was the most excellent planting method to keep higher concentration of nutrients in leaves and to accelerate the growth of apple trees.

蛋白資源으로서의 大豆 增産 및 利用性 向上에 관한 硏究

李弘석,潘性紈,柳順昊,蔡永岩,林善旭,李炯周,韓仁圭 서울大學校農科大學 1984 서울대농학연구지 Vol.9 No.1

1. 大豆의 需給에 관한 硏究. (1) 大豆는 直接 食用消費와 飼料로서 間接消費가 급격히 增加 하고 있다. (2) 1968∼1981년 사이에 大豆의 用途別 消費構造가 크게 變化되어 食用消費에서 飼 料用 消費로 移動하고 있는 것이 뚜렷하다. (3) 大豆 消費量을 推定한 결과 總消費量은 1981年의 ??에서 1993년에는 ??으로 약 2.4배가 될것으로 예상된다. (4) 消費를 충족시키기 위해서는 막대한 양의 輸入이 불가피하지만 國內生産의 增大 와 質的 向上에 관한 方案이 시급히 모색되어야 한다. 2. 良質高蛋白 多收性品種의 選拔 및 育成 (1) 良質高蛋白 多收性品種의 育成을 위하여 母本을 선정하고 人工交配를 實施하여 58組合 670粒의 交配種子를 얻었다. (2) 雜種世代로부터 41組合의 247 F₂個體, 32組合 203系統의 F₃系統, 10組合의 25F₄系統을 선발하였다. (3) 生産力 檢定豫備試驗에서 3系統이 그리고 本試驗에서 2系統이 극히 多收性으로 선발되어 有望視되며 다음 試驗에 供試될 豫定이다. 3. 耕種方法에 따른 大豆蛋白의 量的 및 質的 向上에 관한 硏究. (1) 大豆의 量的收量增加를 위해서는 適正量의 施肥가 要求된다. (2) 전반적으로 볼때 소석회나 요소 엽면 시비는 등숙, 분지수, 株當협수, 株당粒 數, 100粒重 및 收量에 영향을 주고 있지만 標準肥栽培로 충분한 것으로 판단된 다. (4) 含黃 아미노산인 methinie과 cystine의 함량증가에 유황은 效果가 없었다. 4. 大豆根瘤菌의 分離 및 選別 (1) 募集 分離된 菌은 培養的 特性 및 生理試驗에 의하여 大豆根瘤菌種임을 확인하 였다. (2) 大豆品種 東北太, 長葉콩 및 Wayne에서 分離한 것이 根瘤의 差生 및 colony 發 育相이 우수하였다. 5. 大豆의 品種과 施肥에 따른 蛋白質 및 아미노산의 造成變化 (1) 品種間 蛋白質 含量에 큰 차이를 나타내고 있었다. (2) 品種內에서 시비에 따른 蛋白質 含量에 차이가 없었다. (3) 含硫黃 아미노산의 함량이 蛋白質 100g당 5.1∼6.4g으로 상당히 높았으나 품종 간이나 시비 방법에 따른 차이는 크지 않았다. 6. 國內産 大豆의 Broiler에 대한 飼料的 價値에 關하나 硏究 (1) 증체량, 사료섭취량 및 사료효율은 공시품종간에 유의적인 차이를 나타내지 않 았으나 대두 품종 봉의의 증체량이 제일 높았다. (2) 공시 대두는 어분이나 casein에 비하여 높은 증체율을 보았다. (3) 공시품종간에 AME와 TME에는 유의적인 차이를 보이지 않았다. Soybean has been cultivated as main protein source for a long time and it is also an important oil crop. As our living standard is getting better, higher quality in soybean protein and larger quantity of soybean are demanded. Therefore this study was conducted to provide comprehensive understanding for better utilization and processing of soybean as well as improvement of soybean breeding lines for higher yield with better guality. The results are summarized as follows: 1. Study on the demand and supply relationslip of soybean. (1) Demand for soybean as direct daily use of food and feed grain has been rapidly increased for past 13 years. (2) Utilization pattern of soybean had been shifted from direct use of food to feed grain during 1968∼1981. (3) Consumption of soybean will be increased 2.4 fold from ?? in 1981 to ?? in 1993. (4) Huge amount of soyben sbould be imported to satisfy the demand. Therefore certain measures soybean production in land and improvement of soybean protein guality should be considered. 2. Study on the selection and breeding for high yielding varieties with high protein content and better quality of protein in soybean. (1) For the breeding of high yield and high protein content with better quality in soybean, artificial cross between selected parents were made and obtained 670 crossed seeds in 58 combinations. (2) Two hundred forty seven F₂plants of 41 combinations, 203 F₃lines of 32 combinations and 25 F₄lines of 10 combinations were selected from the hybrid population for next generation, respectivly. (3) The results of preliminary yield trial and yield trial, three ?? lines and two ?? lines were selected as the promising lines. These lines will be tested for further yield test and put in regional adaptive trials. 3. Study on the improvement of quantity and quality of soybean protein. (1) Proper fertilization levels must be studied for increase of soybean yield. (2) Although lime and leaf spray of urea influened on the maturity, branch numbers, pod numbers per plant and grain numbers per plant in general, however, these had no positive effects on yield increase under fertrlizer levels used in this experiment. (3) Sulfur from ammonium sulfate fertilizer was ineffective for increase sulfur containing amino acids such as methionine and cystine. 4. Isolation and selection of Rhizobium strains collectecd in soybean fields. (1) Selected strains were confirmed as soybean nodulation bacteria by their cultural characteristics and by physiological test. (2) Strains isolated from cv. Dongbuktae, Jangyeobkong and Wayne were good in nodulation and colony formation. 5. Study on the variation of protein and amino acid composition of protein due to varietal differences and fertilizations. (1) Protein content was varied with varieties. (2) Fertilizations used in this experiment did not affect on protein content. (3) Contents of sulfur bearing amino acids were relatively high in varieties used and were 5.1∼6.4 grams of amino acid per 100 grams of protein, but the differences among the varieties and different fertilizations were not significant. 6. Studies on the nutiritive values of locally produced soybean for the broiler chicken. (1) Although the weight gain of chicks, feed intake and feed efficiency wre not statistically different among three varieties used, however, weight gain of chicks fed with cv. Bongyi was the highest. (2) Chicken fed with soybean grew better than those fed with fish meal or casein. (3) There was no significant difference among soybean varieties used in apparent metabolizable energy and true metabolizable energy.

水稻에 對한 窒素質肥料의 效用(一報) : 施用時期 및 施用率의 相異에 따른 肥效의 差와 이것이 燐酸質肥料效果에 비치는 影響

金浩植,趙伯顯,李春寧,李殷雄,沈相七,柳順昊 서울대학교 1966 서울대학교 論文集 Vol.17 No.-

This experiment was conducted under the joint research work on lowland rice fertilization. The result was summarized as described below. 1. Nitrogen played a determinative role in growth, tillering, and yield of rice plants. 2. The adequate amount of nitrogen to be applied at the time of basic application here was considered to be over 3 kg per 10 are. 3. The uptake of nitrogen from the fertilizer by rice plants was most efficient when the fertilizer was applied at the time of prime growth. However, the most efficient utilization of nitrogen did not necessarily acompany the maximum yield of rice. 4. The basic application and carly top dressing of the fertilizer appeared to be efficient for betterment of rice yeild. 5. the efficiency of phosphorus was not likely affected by time and rate of nitrogen application.

放射化分析에 依한 還元溶出되는 士環Mn의 定量

李春寧,趙載武,柳順昊 서울대학교 1962 서울대학교 論文集 Vol.12 No.-

Two groups of paddy soils, three samples of soils with a moderate productivity and three samples of the soils suffering from AKIOCHI were analyzed for soluble manganese under a reducing condition by an application of activation analysis. Five grams of each soil were incubated at the temperature of 33-35℃ with one gram of glucose plus 50 ml. of water in order to provide the soil with water-logged and microbiological conditions. The daily removal of supernatent solution of each sample was performed and the solution kept air tight in a separate bottle. The remaining soil was discarded. One milliliter of each solution in a polyethylene tube (0.7×3.5㎝.) was subject to the irradiation with a neutron source of TRIGA MARK Ⅱ at Korean Atomic Energy Research Institute. The neutron flux employed was approximately 10^12n ㎝^-2 sec^-1 with five minutes of irradiation. Five hundred rhamda of the activated solution were counted for activity with the use of a gamma ray spectrometer (256 Channel Analyzer). The activity of Mn was corrected for its half life (2.58 hour). The sole peak responsible for Mn appeared in the pulse hight analyzer with the energy level of 0.822Mev, devoid of any interference by other elements. The counts were computed with reference to the standard curve. The results showed that the daily increase in the amount of soluble manganese in each sample reached a maximum in 6 to 7 days with a sudden increment in two days. The amount at a maximum does not change with time thereafter. There was a marked difference in the amount of of soluble Manganese between two groups of soild. The productive soils yielded as much as 102-380 ppm. against 20-26 ppm. of soluble manganese in the soils of AKOCHI. The former group also indicated graded values of soluble manganese in accordance with their productivity.

한국농화학교육의 현황 분석

박창규,이춘영,박선욱,유순호,신재두 한국농화학회 1981 Applied Biological Chemistry (Appl Biol Chem) Vol.24 No.1

Agricultural departmental curricular of the universities have been compared aid analyzed with an exception of that of Chung Nam National University were agricultural chemistry department way established in 1979. The analysis reveals that major subjects covered by the undergraduate curricula of all the universities in agricultural chemistry departments are in the fields of soil science, plant nutrition, agricultural chemicals, biochemistry, and fermentation technology or applied microbiology, although there are minor differences in curricula among universities. Besides, it must be pointed out that the ratio of students to teaching staffs, a significant index of the educational quality, is shown to be somewhat lower than. expected for an appropriate college education. According to the analysis, the curricula of universities located in various areas in Korea do not show substantial differences among them, indicating that there is no locality. Thus, it may be recommendable to set up a unified curriculum of agricultural chemistry departments in Korea so as to achieve a balanced educational improvement.