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시설재배지에서 킬레이트제 처리가 양분 유효도와 배추생육에 미치는 영향
김명숙(Myung-Sook Kim),김유학(Yoo-Hak Kim),노미영(Mi-Young Roh),강성수(Seong-Soo Kang),윤홍배(Hong-Bae Yoon),이형용(Hyeong-Yong Lee) 한국토양비료학회 2012 한국토양비료학회지 Vol.45 No.6
시설재배지 토양의 축적양분인 염류를 활용하기 위해 EC가 높은 토양에 여러 킬레이트제를 처리하여 토양의 화학성과 작물의 무기성분 흡수량을 비교·분석하였다. DTPA와 EDTA를 처리한 구에서 킬레이트제는 Ca, Mg, K, P등의 다량원소 뿐만 아니라 Fe, Cu, Mn, Zn 등의 미량원소와 킬레이트 하는 능력이 뛰어났다. 그러나, 토양의 ECDTPA를 처리한 는 EDTA를 처리한 토양보다 낮아졌다. 킬레이트제가 처리된 토양에서 생육한 배추의 무기성분 흡수량을 살펴본 결과 DTPA 0.5 mM 처리한 구에서 배추의 T-N, P<sub>2</sub>O<sub>5</sub>, K<sub>2</sub>O, 그리고 Fe의 흡수량은 다른 처리구보다 높았다. 이로부터 시설재배지의 집적된 양분을 킬레이트화하여 작물의 양분이용성을 증대하는 데 효과적인 킬레이트제는 DTPA이며, 적정한 농도는 0.5 mM로 나타났다. This study is conducted to evaluate the effects of chelating agents for improving plant growth and reusing accumulated nutrients in soils of plastic film house. Two experiments were carried out at follows: i) The incubation test was conducted using soils treated with 0, 300 mM of EDTA and DTPA to examine the availability of nutrients. ii) For the pot test, chinese cabbages were cultivated in soils with 0, 0.1, 0.5, 1, and 5 mM of EDTA and DTPA to examine the impacts of plant growth response. The application of chelating agents increased ther availability of soil nutrients in the following order: DTPA > EDTA > control. Inorganic concentration of chinese cabbages in DTPA treatments consderably increased in nitrogen, phosphate, iron and aluminium contents than that of the other treatments. The optimal concentration of DTPA for vigorous plant growth as 0.5 mM. Thus, DTPA was more effective than other chelating agents for healty growth of cabbages and the availability of nutrients accumulated in plastic film house.
토양의 유효태 인산과 치환성 양이온의 다성분동시추출 분석방법 비교
김명숙(Myung-Sook Kim),양재의(Jae Eui Yang),김유학(Yoo-hak Kim),윤정희(Jung-Hui Yoon),장용선(Yong-Seon Zhang),곽한강(Han-Gang Kwak),하상건(Sang-Keon Ha),현병근(Byung-Keun Hyun) 한국토양비료학회 2009 한국토양비료학회지 Vol.42 No.3
과학영농과 친환경농업이 대두되면서 토양검정량이 급속하게 증가하고 이에 대처하기 위해 신속하게 분석할 수 있는 분석 방법이 요구되고 있다. 따라서 본연구에서는 신속·간편하게 분석할 수 있는 다성분동시추출방법으로 개발된 Mehlich Ⅲ법, Mod. Morgan법, Kelowna 법과 국내에서 사용 중인 유효태 인산분석법인 Lancaster법 , 치환성 양이온 분석법인 1MNH4OAc법으로 분석되는 분석치들 간의 상관관계를검토하기 위하여 토양특성이 다양한 우리나라 농경지115개소에서 토양을 채취하여 여러 가지 방법으로 화학적 분석을 실시하였다. 다성분동시추출 분석방법인 Mehlich Ⅲ법, Mod. Morgan법, Kelowna법과 기존의 유효인산 분석방법인 Lancaster법과 치환성 양이온 분석방법인 1M NH4OAc법으로 추출한 분석치는 모두 고도로 유의한 직선적인 상관관계에 있었다. 유효인산은 Mehlich Ⅲ법, Mod. Morgan법, Kelowna 법과 Lancaster법으로 추출되는 분석치간에 결정계수(R<SUP>2</SUP>)의 크기는 MehlichⅢ법(0.979<SUP>***</SUP>) > Kelowna법(0.977<SUP>***</SUP>) > Mod. Morgan법(0.553<SUP>***</SUP>)의 순으로 MehlichⅢ 법 이 상 관 이 가 장 높 게 나타났고 Lancaster 법보다 토양 중의 인산을 평균적으로 28% 많이 추출하였다. 치환성 양이온에서도 화산회 토양에서 추출되는 나트륨 성분을 제외하고는 Mehlich Ⅲ법으로 추출되는 분석치가1MNH4OAc법으로 추출되는 것과 가장 상관이 높았다. 따라서 ICP를 이용하여 유효인산과 치환성 양이온의 분석은 다성분동시추출방법인 Mehlich Ⅲ법이 이용 가능할 것으로 판단되었다. Soil testing is one of the best management practices for sustainable agriculture. Recently, as increasing soil testing needs, simplification of soil analytical procedure has been required. To determine recommendable multi-element extractant, the soil testing results of available phosphate and exchangeable cations between the conventional method(Lancasterand1MNH4OAc) and multi-element extraction methods such as Mehlich Ⅲ, Modified Morgan and Kelowna methods were compared. There were highly significant correlation between the conventional methods and multi-element extraction methods (Mehlich Ⅲ, Modified Morgan and Kelowna) for available phosphate and exchangeable K, Ca, Mg and Na. The coefficients of determination (R<SUP>2</SUP>) between available phosphate extracted by Lancaster method and multielement extraction methods were in the order of MehlichⅢ (0.979<SUP>***</SUP>) > Kelowna (0.977<SUP>***</SUP>) > Modified(Mod.). Morgan (0.553<SUP>***</SUP>). For exchangeable cations, there were highly significant correlations between 1M NH4OAc method and Mehlich Ⅲ, Mod. Morgan and Kelowna. However, exchangeable K, Ca and Mg by Mehlich III method were more highly correlated with conventional method than other methods. Therefore, Mehlich III extraction method could be recommended as a single extractant for simultaneous measurement using ICP in the analysis of avaliable phosphate and exchangeable cations.
볏짚 사료가치 증진을 위한 알카리성 과산화수소의 적정 처리수준
최윤희(Yoon Hee Choi),김명숙(Myeong Sook Kim),홍재식(Jai Sik Hong) 한국응용생명화학회 1994 Applied Biological Chemistry (Appl Biol Chem) Vol.37 No.5
These studies were conducted to investigate the chemical composition changes in in vitro digestibility for the improvement of nutritive value of rice straw by alkaline hydrogen peroxide. The content of neutral detergent fiber (NDF), acid detergent fiber (ADF), hemicellulose, cellulose and lignin in rice straw was decreased with higher level of H₂O₂ (pH 11.5). The content of ADF, cellulose and ash of the rice straw washed after H₂O₂ (pH 11.5) treatment tended to be increased but NDF, hemicellulose and lignin were decreased with higher concentration of H₂O₂ (pH 11.5). In the rice straw washed after alkaline hydrogen peroxide treatment the decomposition of cellulose and lignin was effective in pH 11.5∼12.5, in smaller cutting size and 55℃. The in vitro organic matter digestibility was increased with higher H₂O₂ concentration and smaller cutting size of rice straw.
최윤희(Yoon Hee Choi),이상복(Sang Bok Lee),김명숙(Myeong Sook Kim),홍재식(Jai Sik Hong) 한국응용생명화학회 1994 Applied Biological Chemistry (Appl Biol Chem) Vol.37 No.5
Pleurotus Florida with high cellulase activity as well as lignin degradability was selected out among strains for fermentation of the rice straw to improve the nutritive value. When the rice straw was fermented by P. florida, the contents of hemicellulose, cellulose and lignin were decreased to 22.5%. 11.4% and 28.1%, respectively, whereas the contents of rice straw fermented after pretreatment with H₂O₂ or alkaline hydrogen peroxide were decreased much in the lower concentration. The content of T-N (total-nitrogen) and crude fat was increased with the longer fermentation period. The amino acid content of rice straw fermented by P. florida in 30 days was increased to 28.9% and 35.1% as the rice straw was fermented after pretreatment without and with 4% H₂O₂, respectively. The crystalline intensity of rice straw was decreased by pretreatment with 4% H₂O₂ and fermentation by P. Florida. However, the crystall intensity was increased by treatment with alkaline hydrogen peroxide and the more when the straw was washed after the treatment. When the rice straw was fermented by P. Florida for 30 days, the in vitro organic matter digestibility was increased up to 6% of H₂O₂pretreatment.