陆地生态系统可溶性有机氮研究进展

摘要/Abstract

摘要： 可溶性有机氮(dissolved organic nitrogen DON)的流动是陆地生态系统氮循环的重要组成部分。本文就陆地生态系统DON的来源、组成、性质;森林生态系统DON的流动、季节动态以及DON在氮循环中的地位等方面作了概括和探讨。今后的陆地生态系统DON的研究应该集中在以下几个方面:确定陆地生态系统中DON的各分室DON的浓度、流量;DON的源与汇问题;量化不同生态系统中DON库的大小和组成;研究DON在氮的矿化、微生物的固持、以及植物吸收等氮循环过程中的地位对比研究DON与DOC(dissolved organic carbon)的动态差别;探讨DON与植物营养和碳积累的关系等.

关键词: 水分胁迫, 沙地, 樟子松种子, 萌发/发芽, 聚乙二醇(PEG)

Abstract: Due to its active and effective character,dissolved organic nitrogen (DON) plays an important role in the terrestrial nitrogen cycle.The paper summarized the origin,property and flux of dissolved organic nitrogen in terrestrial ecosystems.Some suggestions for further study were put forward,which included,the assessment of hydrological process controls on the release and retention of DON in terrestrial ecosystems; quantification of sources and sinks of DON in terrestrial ecosystems; the ecological significance of DON in mineralization,immobilization,leaching and plant uptake process; differences in the dynamics of DON and DOC;and the relationship between DON and plant nutrition and carbon accumulation.

Key words: Water stress, Sandy land, Pinus sylvestris var mongolica, Seed germination, Polyethylene glycol

中图分类号:

X171.1

刘艳, 周国逸, 刘菊秀. 陆地生态系统可溶性有机氮研究进展[J]. 生态学杂志, 2005, (5): 573-577.

LIU Yan, ZHOU guoyi, LIU Juxiu . Advances in studies on dissolved organic nitrogen in terrestrial ecosystems[J]. cje, 2005, (5): 573-577.

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