[1] SCHULTEN H R, SCHNITZER M. The chemistry of soil organic nitrogen: a review[J]. Biology and Fertility of Soils, 1998, 26(1):1-15.[2] BHOGAL A, MURPHY D V, FORTUNE S, et al. Distribution of nitrogen pools in the soil profile of undisturbed and reseeded grasslands[J]. Biology and Fertility of Soils, 2000, 30(4):356-362.[3] LIPSON D, NÄSHOLM T. The unexpected versatility of plants: organic nitrogen use and availability in terrestrial ecosystems[J]. Oecologia,2001, 128(3): 305-316.[4] HANNAM K D, PRESCOTT C E. Soluble organic nitrogen in forests and adjacent clear cuts in British Columbia[J]. Canadian Journal of Forest Research, 2003, 33(9):1709-1718.[5] ZHU W X, CARREIRO M M. Variations of soluble organic nitrogen and microbial nitrogen in deciduous forest soils along an urban-rural gradient[J]. Soil Biology and Biochemistry, 2004, 36(2):279-288.[6] SCHIMEL J, CHAPIN FS. Tundra plant uptake of amino acid and NH+4 nitrogen in situ: plants compete well for amino acid N[J]. Ecology, 1996, 77(7):2142-2147.[7] LIPSON D A, MONSON R K. Plant-microbe competition for soil amino acids in the alpine tundra: effects of freeze-thaw and dry-rewet events[J]. Oecologia, 1998, 113(3):406-414.[8] NÄSHOLM T, EKBLAD A, NORDIN A, et al. Boreal forest plants take up organic nitrogen[J]. Nature, 1998, 392: 914-916.[9] LIPSON D A, RAAB T K, SCHMIDT S K, et al. Variation in competitive abilities of plants and microbes for specific amino acids[J]. Biology and Fertility of Soils, 1999, 29(3):257-261.[10] HENRY H A L, JEFFERIES R L. Interactions in the uptake of amino acids, ammonium and nitrate ions in the Arctic salt-marsh grass, Puccinellia phryganodes[J]. Plant Cell and Environment, 2003, 26(3):419-428[11] WEIGELT A, BOL R, BARDGETT R D. Preferential uptake of soil nitrogen forms by grassland plant species[J]. Oecologia, 2005, 142(4):627-635.[12] HEDIN L O, ARMESTO J J, JOHNSON A H. Patterns of nutrient loss from unpolluted, old-growth temperate forests:evaluation of biogeochemical theory[J]. Ecology, 1995, 76(2): 493-509.[13] CURRIE W S, ABER J D, MCDOWELL W H, et al. Vertical transport of dissolved organic C and N under long-term N amendments in pine and hardwood forests[J]. Biochemistry, 1996, 35(3): 471-505.[14] PERAKIS S S, HEDIN L O. Nitrogen loss from unpolluted South American forests mainly via dissolved organic compounds[J]. Nature, 2002, 415(24):416-419.[15] QUALLS R G, RICHARDSON C J. Factors controlling concentration, export, and decomposition of dissolved organic nutrients in the Everglades of Florida[J]. Biogeochemistry, 2003, 62(2):197-229.[16] YU Z, KRAUS T E C, DAHLGREN R A, et al. Mineral and dissolved organic nitrogen dynamics along a soil acidity-fertility gradient[J]. Soil Science Society of Amarica Journal, 2003, 67(3):878-888.[17] SCHMIDT S, STEWART G R. Glycine metabolism by plant roots and its occurrence in Australian plant communities[J]. Australian Journal of Plant Physiology, 1999, 26(3):253-264.[18] YU Z, ZHANG Q, KRAUS T E C, et al. Contribution of amino compounds to dissolved organic nitrogen in forest soils[J]. Biogeochemistry, 2002, 61(2):173-198.[19] NEFF J C, CHAPIN III F S,VITOUSEK P M. Breaks in the cycle: dissolved organic nitrogen in terrestrial ecosystems[J]. Frontiers in Ecology and the Environment, 2003, 1(4): 205-211.[20] MCDOWELL W H. Dissolved organic matter in soils-future directions and unanswered questions[J]. Geoderma, 2003, 113(3-4):179-186.[21] ZHONG Z, MAKESCHIN F. Soluble organic nitrogen in temperate forest soils[J]. Soil Biology and Biochemistry, 2003, 35(2):333-338.[22] KIIKKILA O,KITUNEN V,SMOLANDER A.Degradability of dissolved soil organic carbon and nitrogen in relation to tree species[J]. FEMS Microbiology Ecology, 2005, 53(1):33-40.[23] NÄSHOLM T, PERSSON J. Plant acquisition of organic nitrogen in boreal forests[J]. Physiologia Plantarum, 2001, 111(4):419-426.[24] COOKSON W R, MURPHY D V. Quantifying the contribution of dissolved organic matter N isotopic pool dilution[J]. Soil Biology and Biochemistry, 2004, 36(12):2097-2100.[25] JONES D L, HEALEY J R, WILLETT V B, et al. Dissolved organic nitrogen uptake by plants-an important N uptake pathway? [J]. Soil Biology and Biochemistry, 2005, 37(3):413-423.[26] QUALLS R G. Comparison of the behavior of soluble organic and inorganic nutrients in forest soils[J]. Forest Ecology and Management, 2000, 138(1-3):29-50.[27] CHAPMAN P J, WILLIAMS B L, HAWKINS A. Influence of temperature and vegetation cover on soluble inorganic and organic nitrogen in a spodosol[J]. Soil Biology and Biochemistry, 2001,33(7-8):1113-1121.[28] XU Z H, CHEN C R. Fingerprinting global climate change and forest management within rhizosphere carbon and nutrient cycling processes[J]. Environmental Science and Pollution Research, 2006, 13(5):293-298.[29] BURTON J, CHEN C, XU Z, et al. Soluble organic nitrogen pools in adjacent native and plantation forests of subtropical Australia[J]. Soil Biology and Biochemistry, 2007, 39(11):2723-2734.[30] BERTHRONG S T, FINZI A C. Amino acid cycling in three cold-temperate forests of the northeastern USA[J]. Soil Biology and Biochemistry, 2006, 38(5):861-869.[31] GIAI C, BOERNER R E J. Effects of ecological restoration on microbial activity, microbial functional diversity, and soil organic matter in mixed-oak forests of southern Ohio, USA[J]. Applied Soil Ecology, 2007, 35(2):281-290.[32] KRANABETTER J M, DAWSON C R, DUNN D E. Indices of dissolved organic nitrogen, ammonium and nitrate across productivity gradients of boreal forests[J]. Soil Biology and Biochemistry, 2007, 39(12): 3147-3158.[33] JONES D L, KIELLAND K. Soil amino acid turnover dominates the nitrogen flux in permafrost-dominated taiga forest soils[J]. Soil Biology and Biochemistry, 2002, 34(2):209-219.[34] CHEN C R, XU Z H, ZHANG S, et al. Soluble organic nitrogen pools in forest soils of subtropical Australia[J]. Plant and Soil, 2005, 277(1-2):285-297.[35] HUANG W Z,SCHOENAU J J. Fluxes of water-soluble nitrogen and phosphorous in the forest floor and surface mineral soil of a boreal aspen stand[J]. Geoderma, 1998, 81(3-4):251-264.[36] CHEN C R, XU Z H. Analysis and behavior of soluble organic nitrogen in forest soils[J]. Journal of Soils and Sediments, 2008,8(6):363-378.[37] XING S H, CHEN C R, ZHOU B Q, et al. Soil soluble organic nitrogen and active microbial characteristics under adjacent coniferous and broadleaf plantation forests[J]. Journal of Soils and Sediments, 2010, 10(4):748-757.[38] 杨绒,严德翼,周建斌,等.黄土区不同类型土壤可溶性有机氮的含量及特性[J].生态学报,2007,27(4):1397-1403.[39] 郝敬梅,崔晓阳.阔叶红松林和人工红松林土壤中可溶性有机氮的对比[J].东北林业大学学报,2008,36(8):11-13.[40] SONG L C, HAO J M, CUI X Y. Soluble organic nitrogen in forest soils of northeast China [J]. Journal of Forestry Research, 2008,19(1):53-57.[41] PAUL J P, WILLIAMS B L. Contribution of α-amino N to extractable organic nitrogen (DON) in three soil types from the Scottish uplands[J]. Soil Biology and Biochemistry, 2005, 37(4):801-803.[42] MURPHY D V, MACDONALD A J, STOCKDALE E A, et al. Soluble organic nitrogen in agricultural soil[J]. Biology and Fertility of Soils, 2000, 30(5-6):374-387.[43] NEMETH K, BARTELS H, VOGEL M, et al. Organic nitrogen compounds extracted from arable and forest soils by electro-ultrafiltration and recovery rates of amino acids[J]. Biology and Fertility of Soils, 1988, 5(4):271-275.[44] NORDIN A, HÖGBERG P, NÄSHOLM T. Soil nitrogen form and plant nitrogen uptake along a boreal forest productivity gradient[J]. Oecologia, 2001, 129(1):125-132.[45] FISCHER H, MEYER A, FISCHER K, et al. Carbohydrate and amino acid composition of dissolved organic matter leached from soil[J]. Soil Biology and Biochemistry, 2007, 39(11):2926-2935.[46] SMOLANDER A, KITUNEN V. Soil microbial activities and characteristics of dissolved organic C and N in relation to tree species[J]. Soil Biology and Biochemistry, 2002, 34(5):651-660.[47] QUALLS R G, HAINES B L. Geochemistry of dissolved organic nutrients in water percolating through a forest ecosystem[J]. Soil Science Society of America Journal, 1991, 55:1112-1123.[48] KALBITZ K, SOLINGER S, PARK J H, et al. Controls on the dynamics of dissolved organic matter in soils: a review[J]. Soil Science, 2000, 165(4):277-304.[49] SMOLANDER A, LOPONEN J, SUOMINEN K, et al. Organic matter characteristics and Betula pendula and C and N transformations in the humus layer under two tree species, Picea abies[J]. Soil Biology and Biochemistry, 2005, 37(7):1309-1318.[50] KIIKKILA O, KITUNEN V, SMOLANDER A. Dissolved soil organic matter from surface organic horizons under birch and conifers: Degradation in relation to chemical characteristics[J]. Soil Biology and Biochemistry, 2006, 38(4):737-746.[51] AIKEN G, LEENHEER J. Isolation and chemical characterization of dissolved and colloidal organic matter[J]. Chemistry and Ecology, 1993, 8(3):135-151.[52] MICHALZIK B, MATZNER E. Dynamics of dissolved organic nitrogen and carbon in a Central European Norway spruce ecosystem[J]. Soil Science, 1999, 50(4):579-590.[53] MCCARTHY M, PRATUM T, HEDGES J, et al. Chemical composition of dissolved organic nitrogen in the ocean[J].Nature, 1997, 390:150-154.[54] MAIE N, PARISH K J, WATANABE A, et al. Chemical characteristics of dissolved organic nitrogen in an oligotrophic subtropical coastal ecosystem[J]. Geochimica et Cosmo-chimica Acta, 2006, 70(17):4491-4506.[55] 陈水挟,钟月明,王将克.一些土壤样品的氨基酸初步分析[J].中山大学学报:自然科学版,1996,35(6):106-109.[56] 周克瑜,施书莲.我国几种主要土壤中氮素形态分布及其氨基酸组成[J].土壤,1992, 24(6):285-288.[57] 李世清,李生秀,杨正亮.不同生态系统土壤氨基酸氮的组成及含量[J].生态学报,2002,22(3):379-386.[58] SCHIMEL J P, BENNETT J. Nitrogen mineralization: challenges of a changing paradigm[J]. Ecology, 2004,85(3):591-602.[59] CHAPIN III F S, FETCHER N, KIELLAND K, et al. Productivity and nutrient cycling of Alaskan tundra: enhancement by flowing soil water[J]. Ecology, 1988, 69(3):693-702.[60] FISK M C, SCHMIDT S K. Nitrogen mineralization and microbial biomass nitrogen dynamics in three alpine tundra communities[J]. Soil Science Society of America Journal, 1995, 59(4):1036-1043.[61] KAYE J P, HART S C. Competition for nitrogen between plants and soil microorganisms[J]. Trends in Ecology & Evolution, 1997, 12(4):139.[62] CHAPIN F S, MOILANEN L, KIELLAND K. Preferential use of organic nitrogen for growth by a non-mycorrhizal arctic sedge[J]. Nature, 1993,361:150-153.[63] ÖHLUND J, NÄSHOLM T. Regulation of organic and inorganic nitrogen uptake in Scots pine (Pinus sylvestris) seedlings[J]. Tree Physiology, 2004, 24(12):1397-1402.[64] WARREN C R. Potential organic and inorganic N uptake by six Eucalyptus species[J]. Functional Plant Biology, 2006, 33(7):653-660.[65] RAAB T K, LIPSON D A, MONSON R K. Soil amino acid utilization among species of the Cyperaceae: Plant and soil processes[J]. Ecology, 1999, 80(7):2408-2419.[66] KIELLAND K, MCFARLAND J,OLSON K. Amino acid uptake in deciduous and coniferous taiga ecosystems[J]. Plant and Soil, 2006, 288(1-2):297-307.[67] WARREN C R,ADAMS P R. Uptake of nitrate, ammonium and glycine by plants of Tasmanian wet eucalypt forests[J]. Tree Physiology, 2007, 27(3):413-419.[68] XU X, OUYANG H, KUZYAKOV Y, et al. Significance of organic nitrogen acquisition for dominant plant species in an alpine meadow on the Tibet plateau, China[J]. Plant and Soil, 2006, 285(1-2):221-231.[69] MENGEL K, SCHNEIDER B, KOSEGARRTEN J. Nitrogen compounds extracted by electroultmfitration(EUF) or CaCl2 solution and their relationships to nitrogen mineralization in soils[J].Plant Nutr Soil Sci, 1999, 162:139-148.[70] 宋建国,林杉,吴文良,等.土壤易矿化有机态氮和微生物态氮作为土壤氮素生物有效性指标的评价[J].生态学报,2001,21(2):290-294. |