铵态氮源和碳源对土壤N2O、CO2释放的影响

在田间持水量WFPS为70％、温度为20℃的条件下，通过室内静态培养方法研究铵态氮源与不同碳源结合，对华北平原典型小麦-玉米轮作体系土壤N2O、CO2释放的影响。其中，碳源种类分别为葡萄糖、果胶、淀粉、纤维素、木质素和秸秆。结果表明添加葡萄糖和果胶有效促进了土壤N2O的释放，并在第1d达到最大值，分别为4039．85μgN2O-N·kg^-1·d^-1和2533．44μgN2O-N·kg^-1·d^-1；添加纤维素和只施秸秆处理降低了N2O释放。施入碳源增加了CO2释放，顺序为纤维索〉淀粉〉葡萄糖〉果胶〉秸秆〉木质素。培养结束后土壤中铵态氮几乎消耗完全，除添加葡萄糖处理外，其他施碳土壤的硝态氮...

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Published in农业资源与环境学报 Vol. 33; no. 1; pp. 23 - 28
Main Author 王琳 周晓丽 马银丽 巨晓棠 吉艳芝 张丽娟
Format Journal Article
LanguageChinese
Published 农业农村部环境保护科研监测所 10.01.2016
中国农业生态环境保护协会
Subjects
CO2
N2O
华北地区
碳源
铵态氮源
华北地区
铵态氮源
碳源
N2O
CO2
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ISSN2095-6819
2095-6819

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Summary:在田间持水量WFPS为70％、温度为20℃的条件下，通过室内静态培养方法研究铵态氮源与不同碳源结合，对华北平原典型小麦-玉米轮作体系土壤N2O、CO2释放的影响。其中，碳源种类分别为葡萄糖、果胶、淀粉、纤维素、木质素和秸秆。结果表明添加葡萄糖和果胶有效促进了土壤N2O的释放，并在第1d达到最大值，分别为4039．85μgN2O-N·kg^-1·d^-1和2533．44μgN2O-N·kg^-1·d^-1；添加纤维素和只施秸秆处理降低了N2O释放。施入碳源增加了CO2释放，顺序为纤维索〉淀粉〉葡萄糖〉果胶〉秸秆〉木质素。培养结束后土壤中铵态氮几乎消耗完全，除添加葡萄糖处理外，其他施碳土壤的硝态氮含量均有所增加。在培养前3d，土壤NH4^＋和NO3^-总含量与N2O释放量显著相关。
Bibliography:North China; ammonium nitrogen source; carbon source; N2O; CO2
12-1437/S
To study the effect of ammonium nitrogen source combined with different carbon sources, which included glucose, pectin, starch, cellulose, lignin and straw, on N2O and CO2 emissions of soil in the typical wheat-maize rotation system in typical North China plain, the experiment was carried out through the static incubation-gas chromatograph method, with the WFPS of 70% and the temperature of 20 ℃. The results showed that the addition of glucose andpectin could effectively promote N2O emissions, with the peak values of 4 039.85 μg N2O- N ·kg·d^-1 and 2 533.44 μg N2O- N ·kg·d^-1 on the first day, respectively; while the cellulose and straw reduced N2O emissions. The carbon source increased CO2 emissions, the order was cellulose〉starch〉glucose〉pectin〉straw〉lignin. The ammonium nitrogen in soil was almost completely consumed after the incubation. Except the addition of glucose, the nitrate nitrogen contents of the soil added the other carbon so
ISSN:2095-6819
2095-6819