福建农业学报Issue(9)：919-925,7.
土壤可溶性有机氮及土壤微生物对其调控的研究进展
Soluble Organic Nitrogen and Its Transformation Regulated by Microbes in Soil:a Review
摘要
Abstract
In soil,nitrogen mostly exists in the form of organic polymers,which can transform into soluble organic nitrogen (SON)through a series of complex biological and non-biological processes.In this paper,SON refers to the organic nitrogen extracted by water or salt solution,rather than the dissolved organic nitrogen (DON)collected in situ .Currently,the research on SON largely focuses on forest-,grassland-and/or agro-ecosystems.There are differences in the content and composition of the soil SON in different ecosystems that vary in soil type,land use, vegetation,soil management and/or environmental factors.A great deal of the information obtained thus far indicates a correlation between SON content and the quantities and components of the microorganisms in soil,the activities of extracellular enzymes,etc.The transformation process may include breakdown of the polymeric nitrogen by bacteria,fungi and/or extracellular depolymerases secreted by microbes in soilor plants into soluble subunits that can be utilized by microorganisms or plants.The soluble subunits may also be further degraded into ammonium (NH +4 )and nitrate (NO-3 ),which are the preferred N source for bacteria,fungi and plants.At present,few study targets the microbes that are capable of degrading organic nitrogen into subunits,while only a few reported the degradation and absorption of organic nitrogen by mycorrhizal fungi.Thus,future studies ought to be directed toward the understanding of the regulatory mechanisms of soil organic nitrogen transformation.关键词
DON/SON/土壤微生物/胞外解聚酶/菌根真菌Key words
dissolved organic nitrogen/soluble organic nitrogen/soil microbe/extracellular depolymerase/mycorrhizal fungi分类
农业科技引用本文复制引用
钟珍梅,杨庆,游小凤,黄秀声,翁伯琦,刑世和,冯德庆,陈钟佃..土壤可溶性有机氮及土壤微生物对其调控的研究进展[J].福建农业学报,2015,(9):919-925,7.基金项目
福建省科技计划项目---省属公益类科研院所基本科研专项（2014R1017-7）；国家科技支撑计划项目（2012BAD14B15，2011BAD17B02）；福建省财政专项---福建省农业科学院科技创新团队建设项目 （）
