고추에 대한 麥酒汚泥 施用效果試驗(第I報)

陸昌洙(Chang-Soo Yuk),趙成鎭(Seong-Jin Cho) 한국토양비료학회 1985 한국토양비료학회지 Vol.18 No.2

忠北地域 施設園藝栽培地 土壤의 鹽類集積 實態調査

陸昌洙(Chang-Soo Yuk),金才正(Jai-Joung Kim),洪淳達(Soon-Dal Hong),姜報求(Bo-Goo Kang) 한국토양비료학회 1993 한국토양비료학회지 Vol.26 No.3

경량기포 콘크리트 부산물 시용이 잔디의 생육에 미치는 영향

육창수(Chang-Soo Yuk) 한국토양비료학회 1998 한국토양비료학회지 Vol.31 No.4

인삼포지(人蔘圃地)의 토양화학성(土?化?性)이 생육(生育) 및 수량(收量)에 미치는 영향(影響)

이대호,육창수,한강완,남기열,배효원,Lee, Il-Ho,Yuk, Chang-Soo,Han, Kang-Wan,Nam, Ki-Yeui,Bae, Hyo-Won 한국토양비료학회 1981 한국토양비료학회지 Vol.13 No.4

인삼(人蔘)의 생육(生育)에 적합(適合)한 토양화학성분별 함량(含量)과 이들과 인삼(人蔘)의 생육(生育) 및 수량(收量)과의 관계를 구명(究明)코저 인삼주산지(人蔘主産地) 강화외(江華外) 4개군(個郡)의 농가포장(農家圃場)(홍삼포(紅蔘圃)) 49개소(個所)을 조사(調査)한 결과(結果)를 요약(要約)하면 다음과 같다. 1. 인삼(人蔘)의 생육(生育) 및 수량(收量)과 상관관계가 있는 화학성분별 함량(含量)은 우량포지(優良圃地)에서 CEC가 8.9~14.5me/100g, 유기물(有機物) 1.5~3.5% 유효인산 45~257ppm, 가리(加里) 0.34~0.55me/100g이었고, K/P비(比)는 0.002~0.012이었다. 2. 이들중 CEC, 유기물(有機物), 치환성가리(置換性加里) 및 K/P비(比)는 수량(收量)과 정상관을 CEC는 생육상황과 유의성(有意性)있는 상관을 나타냈으며, 유효인산은 수량(收量)과 부(負)의 상관을 보여주었다. 3. 임삼포지(人蔘圃地)의 K/P비(比)와 수량(收量)과는 고도(高度)의 정상관을 보여주어 인삼엽중(人蔘葉中)의 K/P비(比)와 수량(收量)과의 밀접(密接)한 관계가 있음을 보여 주었다. To find the relationship between the adequate amount of soil chemical components and ginseng growth including root weight, 49 farmer's red ginseng field from the main ginseng growing area were studied intensively. 1. The ranges of soil chemical component of high yield ginseng field were 8.9 to 14.5 me/100g of CEC 1.5 to 3.5% of organic matter, 45 to 257 ppm of available phosphorus, 0.34 to 0.55 me/100g of potassium and 0.002 to 0.012 of K/P ratio respectively. 2. Higher content of organic matter, CEC, exchangeable potassium and higher rate of K/P were observed in soils of ginseng field with high yield than in soils of low one. The CEC content in soil was positively correlated with the plant growth, and available phosphate content in soil was negatively correlated with yield of ginseng root. 3. There was highly positive significant correlation between root yield of ginseng and K/P ratio of ginseng soil. Similar result also observed between root yield of ginseng and K/P ratio of upper part of ginseng plant.

置換性 A1 含量에 따른 石炭所要量 決定에 關한 硏究

柳寅秀(In Soo Ryu),趙成鎭(Seong Jin Cho),陸昌洙(Chang Soo Yuk) 한국토양비료학회 1974 한국토양비료학회지 Vol.7 No.3

수종(數種)의 비두과(非豆科) 식물(植物)로 부터의 질소고정균(窒素固定菌)의 분리(分離)에 관(關)한 연구(硏究)

안상배,포생탁마,육창수,Ahn, Sang-Bae,Gamo, H.,Yuk, Chang-Soo 한국토양비료학회 1990 한국토양비료학회지 Vol.23 No.1

수종(數種)의 비두과식물(非荳科植物)의 뿌리로 부터 질소고정균(窒素固定菌)을 분리(分離)하여 분리(分離)된 균(菌)에 대(對)해서 숙주식물(宿主植物)의 접종실험(接種實驗)을 하여 유효균(有效菌)의 선발(選拔)을 한 결과(結果) 1. 9개(個)의 식물(植物)에 대(對)해서는 시금치, 배추, 오이, 갓 및 가지에서 비교적(比較的) 높은 아세칠렌 환원능(還元能)을 가진 균주(菌株)를 얻었고 2. 그 중(中)에서 아세칠렌 환원능(還元能)이 큰 4개(個)의 숙주식물(宿主植物)중 시금치, 배추, 오이에서 양호(良好)한 생육(生育)을 하는 균주(菌株)를 찾았다. 특(特)히 시금치에서 접종효과(接種效果)가 현저(顯著)하였다. 3. 이상(以上)의 결과(結果)로 부터 비두과식물(非荳科植物)의 뿌리에도 약한 협생(協生)을 하는 질소고정균(窒素固定菌)이 생육(生育)되고 있어 뿌리의 생장(生長) 및 분화(分化)를 촉진(促進)시켜 지상부(地上部)의 생육(生育)을 왕성하게 하는 것으로 판단(判斷)된다. A number of nitrogen-fixing microorganisms were isolated from roots of non-legumious crops and evaluated for their nitrogen-fixing ability on their host crops. The results are summarized as follows: 1. Among nitrogen-fixing isolates obtained from 9 different crops, several isolates showed relatively higher level of acetylene reduction activity on Spinach, Chinese cabbage, Cucumber, mustard and Egg plant. 2. When the isolates were inoculated into 4 host crops, a number of isolates were found to grow well on Spinach, Chinese cabbage and Cucumber, but particularly well on the former. 3. Results of this study suggest that nitrogen-fixing a symbiotic microorganisms are also present and able to grow well on roots of non-legumious crops, and stimulate plant growth by promoting growth and differentiation of roots.

수도의 건물 생산 및 배분의 수리적연구 II. 이앙기에 따른 부위별 건물배분

조동삼,정승근,허훈,육창수,Cho, Dong-Sam,Jong, Seung-Keun,Heo, Hoon,Yuk, Chang-Soo 한국작물학회 1990 한국작물학회지 Vol.35 No.3

Two rice varieties, Samkangbyeo and Sangpungbyeo, were transplanted on 1/2000a pots at 6 different dates beginning on May 11 with 10 day interval in 1987 and at 4 different dates beginning on May 21 with 10 day interval in a paddy field at the Chungbuk Provincial Rural Development Administration. Dry matter distributions to stem and leaf sheath, leaves and ear at different growth stages were analyzed to provide basic informations neccessary for the development of dynamic growth model. Dry matter production was reduced as transplanting was delayed and the degree of reduction was greater at the transplanting later than June 1. Dry matter distribution to stem and leaf sheath was increased up to 60-70 days after transplanting with the maximum ratio between 60-70%, which were decreased to 37-43% in pots and 27-33% in field at the end of ripening stage. On the other hand, dry matter distribution to leaf blade was decreased from 40-50% at transplanting to 11-17% at harvesting. Ear dry matter distribution increased rapidly after heading and the distribution ratio was 42-49% in pots and 52-62% in field. Although regression equations to predict dry matter distribution to different parts of rice plant were satisfactory for individual experiment, the application to different experiment was not appropriate.

Alternate Prey: A Mechanism for Elimination of Bacterial Species by Protozoa

라리 엠 말로리,육창수,리누 량,마틴 알렉산더,Mallory, Larry M.,Yuk, Chang-Soo,Liang, Li-Nuo,Alexander, Martin 한국토양비료학회 1983 한국토양비료학회지 Vol.16 No.4

항생물질(抗生物質)에 저항성(抵抗性)이 있는 Salmonenella typhimurium과 Klebsilla pneumoniae종(種)을 미처리(未處理) 하수(下水)에 첨가(添加)하였을 때 쉽게 죽었으나 살균하수중(殺菌下水中)에서는 생육(生育)하였다. 그 감소(減少)는 생활력(生活力)이 떨어져서 생기는 것이 아니고 유기영양분(有機榮養分)이 포함(包含)되지 않은 용액중(溶液中)에서 적어도 15일간(日間)은 많은 수(數)가 생존(生存)할 수 있었기 때문에 그것은 경쟁(競爭)의 결과(結果)가 아니다. 독성생성(毒性生成), 박테리오화지, 그리고 Bdellovibrio는 위의 두 세균(細菌)의 소멸(消滅)에 원인(原因)이 되지 않았다. 만일(萬一) 하수(下水)를 처음에 $3{\mu}m$여지(濾紙)에 통과(通過)시켰거나 cycloheximide나 cycloheximide에 nystatin을 혼합(混合)하여 처리(處理)하면 감소(減少)하는 것은 역시(亦是) 뚜렷하였으나 원생동물(原生動物)은 이 조건하(條件下)에서 생육(生育)했었다. 만일(萬一) 하수(下水)가 S. typhimurium 혹은 K. pneumoniae를 첨가(添加)하기 전(前)에 여과(濾過)하거나 진핵세균억제제(眞核細菌抑制劑)로 처리(處理)되면 그 감소(減少)는 거의 없었고 원생동물(原生動物)은 검출(檢出)되지 않았다. 만일(萬一) cycloheximide, streptomycin, erythromycine 혹은 많은 양(量)의 glucose가 하수(下水)에 첨가(添加)되면 S. typhimurium의 수(數)는 증가(增加)하였다. Tetrahymena themophilus는 세균(細菌)의 수(數)가 약(約) $10^4/ml$ 일 때 완충액(緩衝液)에서 S. typhimurium의 수(數)를 현저(顯著)히 감소(減少)시키지는 못하였다. 그러나 완충용액(緩衝溶液)에 Enterobacter agglomerans 세포(細胞)를 $10^8/ml$ 이상(以上)으로 첨가(添加)하였을 때 T. thermophilus는 E. agglomerans와 S. typhimurium의 수(數)를 각각(各各) $10^6{\sim}10ml$까지 감소(減少)시켰다. S. typhimurium의 수(數)는 E. aggromerans 세포(細胞)의 이차적(二次的) 증가(增加)로 더욱 감소(減少)하였다. 그리하여 하수(下水)에서 S. typhimurium과 K. pneumoniae의 소멸(消滅)은 원생동물(原生動物)의 포식(捕食)의 결과(結果)라고 보는 것이다. 교체(交替) 포식자(捕食子)가 포식자(捕食者)에 의한 활성적(活性的) 사양(飼養)을 위(爲)하여 그 수(數)가 최초(最初)의 수(數) 이상(以上)으로 많이 존재(存在)할 때와 포식자(捕食子)의 생장(生長) 비율(比率)이 포식비율(捕食比率)보다 떨어질 때에 포식자(浦食者)는 자연환경(自然環境)에서 포식자종(捕食子種)들을 소거(消去)할 것이라고 제안(提案)하는 것이다. Antibiotic-resistant strains of Salmonella typhimurium and Klebsiella pneumoniae died readily after their addition to raw sewage, but they grew in sterilized sewage. The decline was not a result of antibiotic stresses, and because the bacteria were able to survive in large numbers for at least 15 days in solutions containing no organic nutrients, it was not a result of competition. Toxin production, bacteriophages, and Bdellovibrio did not cause the disappearance of the two bacterial species. A decline was also evident if the sewage was first passed through a $3-{\mu}m$ filter or treated with cycloheximide or cycloheximide plus nystatin, but protozoa developed under these conditions. Little or no decline occurred if the sewage was filtered and treated with the eucaryotic inhibitors before adding S. typhimurium or K. pneumoniae, and protozoa were not detected. S. typhimurium increased in abundance if cycloheximide, streptomycin, and erythromycin or large amounts of glucose were added to sewage. Tetrahymena thermophilus did not significantly reduce the population of S. typhimurium in buffer when the density of the bacterium was about $10^4/ml$. However, when more than $10^8$ Enterobacter agglomerans cells per ml were added to the buffer, T. thermophilus reduced the abundance of E. agglomerans and S. typhimurium to $10^6$ and 10/ml, respectively. The density of S. typhimurium was further decreased by a second increment of E. agglomerans cells. The disappearance of S. typhimurium and K. pneumoniae from sewage thus is the result of predation by protozoa. It is proposed that predators will eliminate a prey species from a natural environment when an alternate prey is present at concentrations above the threshold number for active feeing by the predator and when the rate of growth of the prey is less than the rate of predation.

水位調節에 依한 灌漑水의 制限供給이 포트栽培水稻의 生育에 미치는 影響

金才正(Jai-Joung Kim),陸昌洙(Chang-Soo Yuk),鄭光溶(Kwang-Yong Jung) 한국토양비료학회 1990 한국토양비료학회지 Vol.23 No.4

수도의 건물생산 및 배분의 수리적 연구 III. 재식밀도에 따른 부위별 건물배분

조동삼,정승근,허훈,육창수,Cho, Dong-Sam,Jong, Seung-Keun,Heo, Hoon,Yuk, Chang-Soo 한국작물학회 1990 한국작물학회지 Vol.35 No.4

In developing dynamic growth model of a crop, it is important to estimate accurate dry matter partition to different parts of crop plants. Two rice varieties, Samkang and Chucheong, were transnplanted with three planting densities of 72. 90 and 120 hills per 3.3㎡ on May 30 and June 15 in 1988 to study the effect of planting density on dry matter partition in rice plants. Total dry wight per square meter of two varieteis in May 30 transplanting were greater than those in June 15 transplanting. Total dry wights were increased as planting density was increased. The response of dry weights of differents parts of rice plants per hill were decreased as the density was increased. Although the difference in dry weights of leaf blade and stem and sheath between two varieties was not great, greater ear weight of Samkang resulted in greater total dry weight than that of Chucheong. Despite of transplant in date and planting density on dry weights, the ratio of dry matter partition to different parts of rice plants at a certain growth stage remained constant. Estimated dry weights of different parts at two stages of growth based on average ratio of dry matter partition over two transplantion dates and planting densities agreed well with those observed.