KONG Ling-Zhu,LIU Shuang,ZHENG Zhen,et al.Changes of the Soil Nitrogen and Phosphorus in Different Periods of Abandoned Farming Wetlands along the Yangtze River in Anqing, Anhui Province[J].Research of Soil and Water Conservation,2014,21(01):43-46.
不同退耕年限下安庆沿江湿地土壤氮、磷变化研究
- Title:
- Changes of the Soil Nitrogen and Phosphorus in Different Periods of Abandoned Farming Wetlands along the Yangtze River in Anqing, Anhui Province
- 分类号:
- S153
- 摘要:
- 选取退耕3~21 a的湿地土壤，以现耕油菜地和原始自然湿地土壤为对照，对安庆沿江湿地土壤氮、磷的变化趋势进行了比较分析。结果表明，不同退耕年限下土壤氮、磷素变化趋势明显。土壤全氮含量变化在退耕3~7 a内随退耕年限的增长呈增加趋势，在退耕7 a后达到一个相对稳定状态；土壤有效氮含量变化与全氮含量变化趋势基本一致。土壤全磷含量变化随退耕年限的增长呈较缓递减趋势，平均减少速率为11.6%；土壤有效磷含量的变化在退耕初期随退耕年限的增加呈减少趋势，在退耕9 a后随退耕年限增长呈增加趋势。研究结果表明，相对于土壤氮素，退耕后湿地土壤磷素恢复相对滞后，因此评价湿地土壤生态恢复时土壤磷素指标尤为重要。
- Abstract:
- Soils from wetlands recovered from farmlands with different returning farmland to wetland (RFL) periods were sampled to analyze changes of the soil nitrogen and phosphorus in Anqing along the Yangtze River. The results showed that changes of soil nitrogen and phosphorus were significant after RFL. Soil total nitrogen content and available nitrogen content showed a increasing trend within the RFL period of 3~7 years, and then kept a stable situation during the RFL period of 7~21 years. Soil total phosphorus showed a declining trend with average decreasing rate of 11.62% during RFL period; soil available phosphorus content decreased within 9 years of RFL, and increased after 9 years of RFL. Soil phosphorus recovered slower than soil nitrogen after RFL, which indicated that soil phosphorus was the very important indicator for wetland soil ecological restoration.
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备注/Memo
收稿日期:2013-03-16;改回日期:2013-05-17。
基金项目:国家自然科学基金项目（41001369，41301249）；安徽省自然科学基金（1308085MD22）
作者简介:孔令柱(1989-),男,山东菏泽人,硕士研究生,主要从事湿地土壤环境方面的研究。E-mail:13953055307.cool@163.com
通讯作者:张平究(1975-),男,江西玉山人,教授,主要从事土壤质量与土壤微生物生态研究。E-mail:changpj2006@163.com