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류인수 한국토양비료학회 2008 한국토양비료학회 세미나 Vol.2008 No.5
이상으로 북한의 토양학 교재와 토양비료 분야 연구논문을 검토한 결과를 요약해 보면 다음과 같다. ○ 북한이 토양교재는 토양학 외에 다른 관련분야와 연관을 맺어 토양개량 및 보호학, 토양생물지리(사범대학용), 토양 지리학 등의 교재명칭을 가진 것들이 발간되어왔다. 토양비료 사전은 1985년, 토양사전은 1994년에 출판되어 남한보다 빨랐다. ○ 연구내용의 변화에 있어 1950년대부터 1970년대까지 토양조사 및 토양생성학적 연구가 활발하게 진행되었고 토양도는 일반토양도, 농업토양도 및 토양표식도의 세 가지가 발간되어 활용되었다. ○1980년대에는 기초연구를 강화하여 주로 논토양에 대한 토양화학적 연구에 비중을 두었으나 1990년대부터 시비개선연구로 전환하여 밭에서는 강냉이에 대한 시비연구가 중점을 이루었고 논토양에서는 시비진단 방법 연구가 진행되었다. ○ 남북한 학술용어의 이질화가 깊어지고 있으며 북한에는 어색한 용어도 있으나 남한에서는 옛 부터 농가에 전래되어 온 토착용어의 발굴 노력이 부족했던 것으로 생각된다.
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지사탕(止瀉湯)의 항사하작용(抗瀉下作用)에 관(關)한 연구(硏究)
류인수,류봉하,김진성,Ryu, Ihn-Soo,Ryu, Bong-Ha,Kim, Jin-Sung 대한한방내과학회 2008 大韓韓方內科學會誌 Vol.29 No.2
Objective : The aim of this experimental study was to investigate the anti-diarrhea effects of Jisa-tang using mice and guinea pigs. Methods : We feed Jisa-tang to mice and guinea pigs to investigate its effects for anti-diarrhea action. We observed its actions on gastrointestinal smooth muscles, on the transportability of small and large intestines, on diarrhea induced by castor oil and magnesium sulfate, and on enteropooling by castor oil and prostaglandin $E_2(PGE_2)$. Results : 1. Jisa-tang showed alleviation, depending on the density, only on the contraction of mice's gastrointestinal smooth muscles induced by histamine. 2. The transportability of the small intestine was not significantly constrained by Jisa-tang. However, the enhancement of pyridostigmine-induced transportability of he small intestine was significantly constrained in the group administered 900mg/kg of Jisa-tang (p<0.05). 3. The transportability of large intestine was significantly constrained in the group administered 1,800mg/kg of Jisa-tang. 4. Jisa-tang showed significant anti-diarrhea effects on diarrhea induced by castor oil and by $MgSO_4$ in the group administered 1,800mg/kg of Jisa-tang. 5. Significant reduction of effects of enteropooling induced by caster oil and by prostaglandin $E_2$ were observed only in the group administered 1,800mg/kg of Jisa-tang. Conclusions : We conclude that Jisa-tang has advantageous effects on drug-induced diarrhea and will contribute to the development of diarrhea treatment through further related studies.
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인산시용량(燐酸施用量) 결정기준(決定基準)으로서의 최대인산흡착량(最大燐酸吸着量)
류인수,조인상,Ryu, In-Soo,Jo, In-Sang 한국토양비료학회 1977 한국토양비료학회지 Vol.10 No.2
최선(最善)의 인산시용량(燐酸施用量) 결정기준(決定基準)을 찾고저 기경지(旣耕地), 미개간지(未開墾地) 및 제주(濟州) 화산회토양(火山灰土壤)을 공시(供試)하여 충분(充分)한 관수조건하(灌水條件下)에서 콩을 재배(裁培)한 pot시험결과(t試驗結果)를 요약(要約)하면 다음과 같다. 1. 토양별(土壤別) 인산흡착력(燐酸吸着力)의 차이(差異)를 가장 잘 나타내는 지표(指標)는 Langmuir 최대인산흡착량(最大燐酸吸着量)이었다. 2. 최대인산흡착량(最大燐酸吸着量)는 초산(酢酸)암모니움 침출(浸出) Al 함량(含量)에 비례하나 제주도(濟州道) 토양(土壤)에서는 Al외(外)에 유기물함량(有機物含量)의 영향(影響)이 컸다. 3. 최대수량(最大收量)을 얻기 위한 인산시용량(燐酸施用量)은 인산최대흡착량(燐酸最大吸着量)의 30~50% 범위에 있었다. A pot experiment was conducted to find out suitable method in determining the rate of phosphorus application. Soybean was planted under optimum moisture condition. The soils used in this experiment were cultivated and non-cultivated mineral soils, and volcanic ash soils. The results were summarized as follows: 1. Phosphorus adsorption maximum(PAM) was the good parameters to determine phosphorus adsorption capacity of all tested soils. 2. Phosporus adsorption maximum was increased with the content of ammonium acetate extractable aluminum, and the organic matter effects on PAM was considerably high in volcanic ash soils. 3. Requirement of phosphorus for maximum yields were in the range of 30~35% of PAM for tested soils. 4. PAM was considered as a suitable criteria to determine the rate of the phosphorus application and it was also considered to be more attractive than phosphorus absorption coefficient.
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류인수,Ryu, In-Soo 한국토양비료학회 1979 한국토양비료학회지 Vol.11 No.4
Majority of reclaimable soils in hillside lands in Korea are red yellow soils, with exception in Jeju island, where most of reclaimable hillside lands are composed of volcanic ash soils. Songjeong, Yesan and Samgag series are the major soil series of red yellow soils which are available for the reclamation. When observed in the fields, they are distinguished as reddish brown clay loam, red yellow sand loam and yellowish brown sand loam. They have moderately good physical properties but their chemical properties are generally poor for crop cultivations. The chemical properties of red yellow soils, as compared to long time cultivated (matured) soils, are characterized by very low pH, high in exchangeable Al content and phosphorus fixation capacity. Also extraodinary low available phosphorus and organic matter contents are generally observed. On the other, the chemical properties of volcanic ash soils are characterized by high armophous Fe and Al hydroxides and organic matter contents, which are the causative factors for the extremely high phosphorus fixation capacity of the soils. The phosphorus fixation capacity of volcanic acid soils are as high as 5-10 times of that of red yellow soils. Poor growth of crops on newly reclaimed red yellow soils are mainly caused by very low available P and pH and high exchangeable Al. Relatively high P fixation capacity renders the failure of effective use of applied P when the amount of application is not sufficient. Applications of lime to remove the exchangeable Al and relatively large quantity of P to lower the P fixation capacity and to increase the available P are the major recommendations for the increased crop production on red yellow hillside soils. Generally recommendable amounts of lime and P to meet the aforementioned requirements, are 200-250kg/10a of lime and $30-35kg\;P_2O_5/10a$. Over doses of lime. frequently induces the K, B, arid Zn deficiencies and lowers the uptake of P. In volcanic ash soils, it is difficult to alter the exchangeable Al and the P fixation capacity by liming and P application. This may be due to the peculiarity of volcanic ash soil in chemical properties. Because of this feature, the amelioration of volcanic ash soils is not as easy as in the case of red yellow soils. Application of P as high as $100kg\;P_2O_5/10a$ is needed to bring forth the significant yield response in barley. Combined applications of appropriate levels of P, lime, and organic matter, accompanied by deep plowing, results in around doubling of the yields of various crops on newly reclaimed red yellow soils.
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