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中文摘要：
需要紧迫调查土壤公司 2( 二氧化碳) 排出物和土壤在在为探索土壤的潜力的农业系统的节省水的灌溉惯例下面的器官的碳动力学碳隐遁。一个地实验被进行比较影响在土壤上滴灌溉(DI ) 和洪水灌溉(FI ) 在公司 2 排出物的器官的碳动力学和空间、时间的变化在夏天期间在用静电干扰平凡的中国关上了的北方的玉米成长季节房间方法。在成长季节的吝啬的公司 2 流出在 FI 下面比那在 DI 下面是更大的。在地规模的累积公司 2 排出物分别地是在 DI 和 FI 下面的 1959.10 和 1759.12 g/m 2 。累积公司 2 排放在上植物划船(或) 比在在 FI，和累积公司 2 下面的植物排(BR ) 之间，灌溉管子(OP ) 上的排放在 DI 下面在灌溉管子(BP ) 之间比那大的大。在 DI 下面的 OP， BP 和赤裸的区域(BA ) 的累积公司 2 排出物比那些大或，在 FI 下面的 BR 和 BA 分别地。另外， DI 比 FI 更有效地支持了根呼吸。根呼吸贡献的平均比例在 DI 下面的 OP 的土壤公司 2 排出物比或在 FI 下面的大。从这研究得出的一个一般结论是土壤公司 2 排放被土壤水显著地影响内容，土壤温度和空气在 DI 和 FI 下面的温度。溶解的器官的碳(文档) 的更大的集中，微生物引起的生物资源碳(MBC ) 和全部的器官的碳(TOC ) 在 DI 下面比那些在 FI 下面被观察。在 FI 下面的观察高集中(文档， MBC，和 TOC ) 可能从接着禁止了的联系灌溉的土壤浸透被结果微生物引起的活动和土壤的降低的分解率有机物。然而， DI 与 FI 相比在 10-20 厘米的深度增加了土壤有机物质量(到 TOC 的 MBC 的比率) 。我们的结果建议到综合 DI 的从常规 FI 的转变能增加 CO 2 排出物和 DI 需要与另外的管理惯例被相结合在北方中国平原从夏天玉米地减少 CO
英文摘要：
The need is pressing to investigate soil CO2 （carbon dioxide） emissions and soil organic carbon dynamics under water-saving irrigation practices in agricultural systems for exploring the potentials of soil carbon sequestration. A field experiment was conducted to compare the influences of drip irrigation （DI） and flood irrigation （FI） on soil organic carbon dynamics and the spatial and temporal variations in CO2 emissions during the summer maize growing season in the North China Plain using the static closed chamber method. The mean CO2 efflux over the growing season was larger under DI than that under FI. The cumulative CO2 emissions at the field scale were 1959.10 and 1759.12 g/m2 under DI and FI, respectively. The cumulative CO2 emission on plant rows （OR） was larger than that between plant rows （BR） under FI, and the cumulative CO2 emission on the irrigation pipes （OP） was larger than that between irrigation pipes （BP） under DI. The cumulative CO2 emissions of OP, BP and bare area （BA） under DI were larger than those of OR, BR and BA under FI, respectively. Additionally, DI promoted root respiration more effectively than FI did. The average proportion of root respiration contributing to the soil CO2 emissions of OP under DI was larger than that of OR under FI. A general conclusion drawn from this study is that soil CO2 emission was significantly influenced by the soil water content, soil temperature and air temperature under both DI and FI. Larger concentrations of dissolved organic carbon （DOC）, microbial biomass carbon （MBC） and total organic carbon （TOC） were observed under FI than those under DI. The observed high concentrations （DOC, MBC, and TOC） under FI might be resulted from the irrigation-associated soil saturation that in turn inhibited microbial activity and lowered decomposition rate of soil organic matter. However, DI increased the soil organic matter quality （the ratio of MBC to TOC） at the depth of 10-20 cm compared with FI. Our results sugge
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