| 田亚男,张水清,林杉,Muhammad Shaaban,何志龙.外加碳氮对不同有机碳土壤N2O和CO2排放的影响[J].农业环境科学学报,2015,34(12):2410-2417. |
| 外加碳氮对不同有机碳土壤N2O和CO2排放的影响 |
| Influence of Soluble Carbon and Nitrogen Additions on N2O and CO2 Emissions from Two Soils with Different Organic Carbon Content |
| 投稿时间：2015-08-02 |
| DOI：10.11654/jaes.2015.12.022 |
| 中文关键词: 不同有机碳土壤 可溶性碳 N2O排放 CO2排放 |
| 英文关键词: soil organic carbon content soluble carbon nitrous oxide carbon dioxide |
| 基金项目:国家自然科学基金项目(41201255,41171212);中央高校基本科研业务费专项资金资助项目(2013PY114);公益性行业(农业)科研专项经费项目(201203030-5);河南省农业科学院自主创新专项基金 |
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| 中文摘要: |
| 以两种有机碳含量不同的土壤为对象,采用室内培养试验方法,研究了外加可溶性碳氮对黄棕壤(高有机碳含量)和紫色土(低有机碳含量)N2O、CO2排放的影响。试验设置五种处理分别为:对照(CK),低氮(LN),高氮(HN),低氮配施碳(LNC)和高氮配施碳(HNC).结果表明,土壤有机碳含量较高的黄棕壤各处理N2O与CO2排放均高于紫色土。与对照相比,单施氮肥显着促进了两种土壤N2O排放,紫色土HN处理N2O排放最高,而黄棕壤LN处理最高;与单施氮肥相比,LNC和HNC处理均显着降低了紫色土N2O排放,而黄棕壤仅LNC处理N2O排放显着降低。外源碳的输入显着提高了两种土壤CO2排放,但单施氮肥对CO2排放影响不明显。黄棕壤N2O排放通量与CO2排放通量呈极显着正相关,而紫色土N2O排放通量与CO2排放通量没有相关关系。上述结果说明,外加可溶性碳氮源对土壤呼吸及硝化-反硝化强度有一定的激发效应。 |
| 英文摘要: |
| A laboratory study was conducted to evaluate the influence of soluble carbon and nitrogen additions on N2O and CO2 emissions from two soils with different organic carbon content:yellow brown soil(higher organic carbon) and purple soil(lower organic carbon). Five treatments were designed as follows:control(CK), low N(LN), high N(HN), low N + soluble C(LNC), high N + soluble C(HNC). Results showed that N2O and CO2 emissions from yellow brown soil were higher than those from purple soil, due to higher organic C content in yellow brown soil. Additions of nitrogen significantly enhanced N2O emissions from both soils, compared with the control treatment. In purple soil, the N2O emissions had significant positive correlation with N rate, whereas the maximum N2O emission was observed in LN treatment in yellow brown soil. Compared with single N treatments, additions of both N and C lowered N2O emissions in purple soil at two N rates, but such effect was observed in yellow brown soil only at LNC treatment. Addition of soluble carbon significantly increased CO2 emissions in both soils, whereas nitrogen additions did not obviously influence CO2 emissions. Highly significant and positive correlation between N2O and CO2 emissions was found in yellow brown soil, but not in purple soil. These results demonstrate that the additions of soluble carbon and nitrogen have stimulating effects on soil respiration and nitrification-denitrification intensity. |
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