水土保持通报2016，Vol.36Issue(5)：107-112,6.DOI:10.13961/j.cnki.stbctb.2016.05.026
甘南尕海湿地泥炭地不同退化状态下氮素的特征
Nitrogen Characteristics of Peatland Under Different Degradation States in Gahai Lake Wetland of South Gansu Province
摘要
Abstract
Objective] The objective of the study is to analyze the variation of peat soil nitrogen under different degradation states in Gahai lake in South Gansu Province and provide scientific basis for peatland ecological restoration and protection in Gahai lake .[Methods] Through field sampling and laboratory analysis ,we studied the changes in surface soil nitrogen (0—40 cm) of peat land with degradation .[Results] Except for the undegraded peat land ,the total nitrogen content of the other 3 types of degraded peat land was signifi‐cantly higher in September than that in July ,w hile the soil C/N ratio and soil total nitrogen change in an op‐posite direction .The change in the content of ammonium nitrogen in soil was the same in July and Septem‐ber .The soil available nitrogen in the 0—20 cm layer was significantly higher in September than that in July , and the 20—40 cm layer(except for moderate degradation) was the opposite .In the whole profile ,total soil nitrogen ,soil C/N ratio and available nitrogen content were enriched in 20—40 cm layer .Except for moder‐ate degradation ,soil ammonium nitrogen was enriched in the 0—20 cm layer .[Conclusion] The total nitro‐gen content of 4 kinds of degraded soil has obvious temporal variation ,indicating that the vegetation plays an important role in the recovery of peatland in Gahai lake .关键词
甘南尕海湿地/退化类型/氮素Key words
Gahai Lake wetland of South Gansu Province/degradation type/nitrogen分类
农业科技引用本文复制引用
吴江琪,马维伟,李广..甘南尕海湿地泥炭地不同退化状态下氮素的特征[J].水土保持通报,2016,36(5):107-112,6.基金项目
国家自然科学基金项目“植被退化对甘南尕海湿地碳汇／源功能的影响及作用机理研究”（31260155），“甘南尕海湿地植被退化过程中土壤有机碳组分变化及微生物响应机制”（41561022）；高等学校博士学科点专项科研基金联合资助课题（20126202110006）；甘肃省高等学校科研项目（2015A-067，2014A-058）；甘肃省自然科学资金（1506RJZA015）；草地农业生态系统国家重点实验室开放课题资助（SKLGAE201408）；甘肃农业大学自列课题 （）
