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| 大气CO_2浓度升高与氮肥管理对麦田土壤有效氮的影响 | |
| 引用本文： | 钟爽,李琪,梁文举,孟凡祥,朱建国.大气CO_2浓度升高与氮肥管理对麦田土壤有效氮的影响[J].沈阳农业大学学报,2008,39(6). |
| 作者姓名： | 钟爽 李琪 梁文举 孟凡祥 朱建国 |
| 作者单位： | 1. 中国科学院沈阳应用生态研究所,沈阳,110016;中国科学院研究生院,北京,100049 2. 中国科学院沈阳应用生态研究所,沈阳,110016 3. 中国科学院南京土壤研究所,南京,210008 |
| 基金项目： | 国家自然科学基金项目 |
| 摘 要： | 为了探讨全球气候变化对农田土壤氮素动态的影响,采用中国稻麦轮作系统FACE(Free-Air CO2 Enrichment)平台,开展了大气CO2浓度升高和氮肥管理对麦田土壤有效氮含量影响的研究.结果表明:在低N和常规N处理下,大气CO2浓度升高使拔节期土壤C/N分别增加了5.6%和10.2%,土壤pH分别降低了 2.4%和6.4%(p＜O.05).在小麦生育期内.低N和常规N条件下.大气CO2浓度升高降低了土壤总有效氮和NO3--N含量,相对于低N处理.常规N处理下降的趋势更为明显.在低N条件下,大气CO2浓度使拔节期和成熟期土壤中NH4+-N含量分别增加了7.4%和9.9%,而常规N处理中则表现出相反的趋势.本研究显示,大气CO2浓度升高降低了土壤有效氮含量,而施用氮肥增加了土壤有效氰含量. |
| 关 键 词： | 大气CO2浓度 施用氮肥 土壤有效氮 麦田 |
Effect of Elevated Atmospheric CO_2 and N Fertilization on Soil Available Nitrogen in Wheat Field |
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| ZHONG Shuang,LI Qi,LIANG Wen-ju,MENG Fan-xiang,ZHU Jian-guo.Effect of Elevated Atmospheric CO_2 and N Fertilization on Soil Available Nitrogen in Wheat Field[J].Journal of Shenyang Agricultural University,2008,39(6). | |
| Authors: | ZHONG Shuang LI Qi LIANG Wen-ju MENG Fan-xiang ZHU Jian-guo |
| Institution: | ZHONG Shuang1,3,LI Qi1,LIANG Wen-ju1,MENG Fan-xiang1,ZHU Jian-guo2(1.Institute of Applied Ecology,Chinese Academy of Sciences,Shenyang 110016,China,2.Institute of Soil Science,Nanjing 210008,3.Graduate School,Beijing 100049,China) |
| Abstract: | In order to probe into the influence of global climate change on the dynamics of soil nitrogen,the effect of elevated atmospheric CO2 and N application on soil available nitrogen in a wheat field was studied through FACE(Free-air CO2 enrich-ment) system.The results showed that under LN and HN treatments elevated atmospheric CO2 increased soil C/N by 5.6% and 10.2%,respectively and soil pH decreased by 2.4% and 6.4%,respectively(p<0.05) at wheat jointing stage.During the wheat growth period,elevated CO2 decr... |
| Keywords: | elevated atmospheric CO2 N fertilization soil available nitrogen wheat field |
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