CAJ | 학술논문

以水稻土水溶性有机物(DOM)为对照,采用物理化学和光谱学实验研究了农业上常用有机物料:猪粪、绿肥和污泥DOM的理化性质差异.结果表明,水稻土、污泥、猪粪和绿肥DOM含量分别为122,23793,12904,380560mgC/kg.若施用等量有机物料,带入土壤的DOM量最多的应是绿肥.不同有机物料DOM中大分子组分含量高低顺序为:水稻土(51.08%)>猪粪(41.25%)>污泥(23.33%)>绿肥(7.36%);而极性组分含量的顺序则相反,水稻土(10.71%)<猪粪(31.04%)<污泥(31.91%)<绿肥(54.16%).DOM的生物可降解性与DOM的分子量、极性组分含量有关,分子量越大,极性组分含量越低,其越难被降解;反之则易.红外图谱显示DOM中存在醇及苯酚中的-OH、脂肪族饱和C-H、-NH4+、苯环C=C、-NH、多糖类、醇类、羧酸类与酯类C-O及苯环C-H等基团.其非极性基团与极性基团峰高之和的比值顺序显示土壤DOM非极性(1.21)>猪粪DOM(1.12)>污泥DOM(1.11)>绿肥DOM(0.98),紫外图谱也证实了这一点.
이수도토수용성유궤물(DOM)위대조,채용물이화학화광보학실험연구료농업상상용유궤물료:저분、록비화오니DOM적이화성질차이.결과표명,수도토、오니、저분화록비DOM함량분별위122,23793,12904,380560mgC/kg.약시용등량유궤물료,대입토양적DOM량최다적응시록비.불동유궤물료DOM중대분자조분함량고저순서위:수도토(51.08%)>저분(41.25%)>오니(23.33%)>록비(7.36%);이겁성조분함량적순서칙상반,수도토(10.71%)<저분(31.04%)<오니(31.91%)<록비(54.16%).DOM적생물가강해성여DOM적분자량、겁성조분함량유관,분자량월대,겁성조분함량월저,기월난피강해;반지칙역.홍외도보현시DOM중존재순급분분중적-OH、지방족포화C-H、-NH4+、분배C=C、-NH、다당류、순류、최산류여지류C-O급분배C-H등기단.기비겁성기단여겁성기단봉고지화적비치순서현시토양DOM비겁성(1.21)>저분DOM(1.12)>오니DOM(1.11)>록비DOM(0.98),자외도보야증실료저일점.
Since environmental behavior and effect of dissolved organic matter depend mainly on its physicochemical properties,a series of physicochemical and spectroscopic experiments was employed to investigate fractionation and characterization of dissolved organic matter(DOM)derived from pig manure,sewage sludge and green manure,commonly applied in agriculture.The contents of DOM were 122,23793,12904 and 380560 mg C/kg for paddy soil,sewage sludge,pig manure and green manure,respectively. On the basis of the content of high molecule fraction,the DOM could be arranged in the following order：paddy soil(51.08%)>pig manure(41.25%)>sewage sludge (23.33%)>green manure(7.36%).The tendency in content of polar fraction was reverse,i.e.,paddy soil(10.71%)<pig manure(31.04%)<sewage sludge(31.91%)<green manure(54.16%).Biodegradability of DOM was related to its molecular weight and polar fraction.The higher the molecular weight was,the lower the content of polar fraction was,and the more difficultly DOM was biodegraded.FT-LR spectra indicated that DOM contains O-H(hydrogen-bonded alcohols,phenols and carboxylic acids),N-H(amines),aromatic ring,C-O(prolysacchrides,carboxyl),and-CH2 function groups.The ratio of total peak heights of apolar function groups to those of polar function groups can be employed a token of apolarity of DOM.These ratios were arranged as paddy soil DOM (1.21)>pig manure DOM(1.12)>sewage sludge DOM(1.11)>green manure DOM(0.98),and UV spectra of DOM further confirmed the order.