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首页> 外文期刊>Plant, Soil and Environment >Emission of carbon dioxide influenced by nitrogen and water levels from soil incubated straw.
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Emission of carbon dioxide influenced by nitrogen and water levels from soil incubated straw.

机译：受土壤温育的稻草中氮和水含量影响的二氧化碳排放量。

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摘要

An incubation study was carried out to investigate the influence of nitrogen rates to determine optimum C/N ratio under various moisture levels for straw decomposition and sequester carbon (C) in the soil. The aim was to observe straw carbon mineralization through measuring the amount of CO2 evolution. A clay loam topsoil mixed with maize straw was supplied with four nitrogen rates (0.04, 0.08, 0.16, 0.32 g N/kg) using (NH4)2SO4 to adjust C/N ratios at 82, 42, 20, and 10. Soil moisture was maintained at 55%, 70%, 85%, and 100% of field capacity incubated at 25 degrees C for 53 days. The experiment was set up with 16 treatments arranged in complete randomized design. Results showed that mixing of straw with soil increased 50% cumulative CO2-C compared to controls. Averagely, about 44% of added maize straw C was mineralized to CO2-C. Straw addition along with nitrogen and moisture had significant relationships (P<0.05) to cumulative CO2-C, soil organic C and microbial biomass C. There was a highly significant relationship (R2=0.99) between CO2-C emission and incubation time.
机译：进行了一项孵化研究，调查了氮含量的影响，以确定在不同湿度下秸秆分解和土壤中固碳（C）的最佳碳氮比。目的是通过测量CO 2 的释放量来观察秸秆碳的矿化作用。使用（NH 4 ） 2 SO 向与玉米秸秆混合的粘土壤土表层土壤提供四个氮含量（0.04、0.08、0.16、0.32 g N / kg） > 4 以将C / N比调整为82、42、20和10。将土壤湿度保持在田间持水量的55％，70％，85％和100％，在25摄氏度下温育53天。建立了以完全随机设计安排的16种治疗方法的实验。结果表明，与对照相比，秸秆与土壤的混合使CO 2 -C累积增加了50％。平均而言，约44％的玉米秸秆C矿化为CO 2 -C。秸秆还田与氮和水分的关系与累积CO 2 -C，土壤有机碳和微生物量碳有显着的相关性（ P <0.05）。 CO 2 -C的释放与孵育时间之间的（ R 2 = 0.99）。

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