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首页> 外文会议>World Congress of Soil Science >Effect of DOM (dissolved organic matter) derived from litter of Acacia mangium and Eucalyptus pellita on soil N20 emissions
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Effect of DOM (dissolved organic matter) derived from litter of Acacia mangium and Eucalyptus pellita on soil N20 emissions

机译：Acacia Mangium凋落物衍生的Dom（溶解有机物）对土壤N20排放的垃圾凋落物

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摘要

To investigate the effects of dissolved organic matters (DOM) and particulate organic matters (POM) on soil N_2O emissions, soils with added DOM or POM obtained from the leaf litters at different decomposition degrees of two species (Acacia mangium and Eucalyptus pellita) were incubated under a wet condition for 7 days. Soil with added DOM showed greater N_2O emission than control, while POM addition seemed to have no effects on N_2O emission at least in a 1-week incubation. A. mangium DOM caused greater N_2O emission than E. pellita DOM probably because A. mangium DOM with low CN ratio provided larger amount of readily mineralizable N substrate for microbial N20 production. Among two different decomposition degrees of litter, DOM from more decomposed litter had less N20 emission than that from fresh litter. These results suggest that the function of DOM and POM of leaf litter as N20 production substrate is quite different from each other, and the former is also different among species and decomposition stages, implying the importance of DOM quality (CN ratio and bioavailability of dissolved organic C) to control N_2O emission.
机译：调查溶解的有机物质（DOM）和颗粒有机物（POM）对土壤N_2O排放量的影响，随着加入DOM或POM土壤从叶窝在温育不同分解度的物种（马占相思和粗皮桉）中得到7天的湿条件下进行。土壤以补充DOM表现出更大的N_2O排放比控制，同时POM除了似乎有至少1个星期的潜伏期上N_2O排放没有影响。马占相思DOM引起更大N_2O发射比粗皮E. DOM大概是因为具有低CN比马占相思DOM用于微生物生产N20提供较大的容易矿化氮底物的量。中的两个不同的分解度的垃圾，从多个分解垃圾DOM有较少N20发射比从新鲜垃圾。这些结果表明，DOM和落叶层作为N20生产衬底的POM的功能是彼此完全不同的，前者是也物种和分解级中不同，这意味着DOM质量（CN比和生物利用度的重要性的溶解的有机C）以控制N_2O发射。

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