Amino Acid Contents in the Hydrolysates of Fulvic Acids Extracted from Decomposing Plant Residues

부숙식물유체(腐熟植物遺體)에서 추출(抽出)한 Fulv 산(酸) 가수분해(加水分解) 용액중(溶液中)의 Amino 산함량(酸含量)

Sixteen amino acids in the hydrolysates of fulvic acid fraction from 7 plant materials were determined. Analyzed amino acids were aspartic acid, glutamie acid, arginine, histidine, lysine, glycine, alanine, valine, leucine, isoleusine, phenylalanine, tyrosine, serine, threonine, proline, and methionine. Four crop residues, wild grass cuttings and forest tree litters were put under investigation. 1. The content of amino acids in fulvic acid fractions extracted after 90 days of compositing ranged from 0.15% to 0.53% by dry weight. The highest value was found in the fulvic acids of wild grass cuttings and the lowest in those of wheat straw, being equivalent to 1/5-1/31 of those found in humic acids. 2. The group of neutral amino acids shared the largest portion followed by acidic and basic amino acids. 3. Arginine was not detected in fulvic acid fractions from well decomposed residues. 4. Aromatic amino acids, phenylalanine and tyrosine, were virtually absent in fulvic acid fractions. 5. Glycine, glutamic acid and aspartic acid were the 3 major amino acids contained in fulvic acids of well decomposed residues. With glutamic acid and aspartic acid excluded, the decreasing order of concentration of amino acids was roughly in parallel with the increasing order of molecular weight.

볏짚, 보릿짚, 밀짚, 호밀짚의 4가지 작물유체(作物遺體)와 산야초(山野草), 활엽수(闊葉樹)와 침엽수(針葉樹) 낙엽등(落葉等) 7가지 식물유체(植物遺體)를 부열(腐熱)시키면서 경시적(經時的)으로 시료(試料)를 채취(採取)하여 추출(抽出)한 fulv산(酸)을 가수분해(加水分解)시킨후, amino산(酸)을 정량분석(定量分析)한 결과(結果) aspartic acid, glutamic acid, arginine, histidine, lysine, glycine, alanine, valine, leucine, isoleucine, phenylalanine, tyrosine, serine, threonine, proline, methionine 등(等) 16종(種)의 amino산(酸)이 검출(檢出)되었다. 1. 부숙(腐熟) 90일(日)후에 유출(抽出)한 fulvic acid중에는 0.15% 내지 0.53%의 amino산(酸)이 함유되어 있었고, 산야초(山野草)에 가장 많이 그리고 밀짚에 가장 적게 함유되어 있었다. Humic acid의 함량에 비해 1/5내지 1/31의 정도로 함랑이 적었다. 2. Neutral amino acids, acidic amino acids, basic amino acids의 순(順)으로 많이 함유되어 있었다. 3. 부숙화(腐熱化)가 잘된 시료(試料)에서는 arginine이 검출되지 않았다. 4. Aromatic amino acid인 phenylalanine과 tyrosine은 일반적으로 검출되지 않았다. 5. Glycine, glutamic acid와 aspartic acid가 주요 amino acid였으며 glutamic acid와 aspartic acid를 제외하고 비교해 본 결과, 각 amino산중(酸中)에서 분자량(分子量)이 낮을수록 함유된 농도가 높은 경향이었다.