干旱区生态环境知识资源中心(Arid): 土壤碳矿化潜力对沙坡头人工固沙植被演变的响应

Arid

	土壤碳矿化潜力对沙坡头人工固沙植被演变的响应
其他题名	Responses of soil carbon mineralization potential to the succession of artificially sand-bind-ing vegetation in Shapotou region of Tengger desert,North China
	周玉燕 1; 贾晓红 2; 张烜铭 1; 马进琴 1; 陈凤鸣 1; 高艳红 2
来源期刊	生态学杂志
ISSN	1000-4890
出版年	2013
卷号	32 期号:6 页码:1371-1377
中文摘要	土壤呼吸是土壤有机C矿化分解,释放无机养分的重要生物化学过程。本研究通过实验室培养的方法,分析了沙坡头地区人工固沙区不同固沙年限土壤碳矿化潜力的变化。经过103d的室内培养,土壤CO2-C的释放量表现为55龄>47龄>30龄>24龄>21龄>流动沙丘,在垂直方向上表现为0~5cm>5~10cm>10~20cm。而流沙区土壤碳矿化潜力为10~20cm土层最高。不同固沙年限土壤碳矿化潜力、全氮、有机碳、电导率有明显的差异,均表现为随植被恢复年限的延长而增加,随深度的增加而递减。相关性分析表明,土壤碳矿化潜力与土壤有机碳、总氮、C/N、pH、电导率、温度、土壤水分含量呈极显著相关,土壤各环境因子之间亦呈极显著相关。土壤养分含量随着恢复时间的延长而得到明显的改善,土壤碳矿化潜力与土壤养分状况改善程度一致。人工固沙植被的建立促进了土壤微生物活性,通过潜在的土壤呼吸得到表征。植被恢复和凋落物积累使土壤免遭风蚀,显著增加了土壤有机质的输入,因而显著作用于大气C的固存。
英文摘要	Soil respiration is one of the important biochemical processes related to the mineralization and decomposition of soil organic matter (SOM) and the release of inorganic nutrients. In this study,an incubation experiment was conducted to study the mineralization potential of SOM in the re-vegetation area with an age sequence in Shapotou region of Ningxia. After 103 days of incubation,the released soil CO_2-C was in the age sequence of 55 years > 47 years > 30 years > 24 years > 21 years > mobile dune. Meanwhile,the released CO_2-C decreased along the soil profile 0-5 cm,5-10 cm,and 10-20 cm in re-vegetation area,but increased along the soil profile in moving sand dune. There existed significant differences (P<0.05) in the soil carbon mineralization potential,total nitrogen,organic carbon,and electrical conductivity among the age sequence. All the variables increased with age sequence but decreased with soil depth. Correlation analysis showed that the soil carbon mineralization potential was significantly correlated to the soil organic carbon,total nitrogen,C/N ratio,soil temperature,soil water,pH,and electrical conductivity (P<0. 01),and all the soil variables were significantly correlated each other (P< 0. 01). The soil nutrient contents increased obviously with age sequence,and the improvement of soil nutrient status was in accordance with the enhancement of soil carbon mineralization potential. It was suggested that the establishment of artificial vegetation promoted the activities of soil microbes,which was implied by the soil respiration,whereas the vegetation recovery and litter accumulation mitigated soil wind erosion,increased SOM input,and contributed to C sequestration.
中文关键词	人工固沙区 ; 土壤理化性质 ; 土壤碳矿化潜力
英文关键词	artificially fixed sand area soil physical and chemical properties soil carbon mineralization potential
语种	中文
国家	中国
收录类别	CSCD
WOS类目	ECOLOGY
WOS研究方向	Environmental Sciences & Ecology
CSCD记录号	CSCD:4852211
来源机构	中国科学院西北生态环境资源研究院
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/230063
作者单位	1.甘肃省生产力促进中心, 兰州, 甘肃 730000, 中国; 2.中国科学院寒区旱区环境与工程研究所沙坡头沙漠试验研究站, 兰州, 甘肃 730000, 中国
推荐引用方式 GB/T 7714	周玉燕,贾晓红,张烜铭,等. 土壤碳矿化潜力对沙坡头人工固沙植被演变的响应[J]. 中国科学院西北生态环境资源研究院,2013,32(6):1371-1377.
APA	周玉燕,贾晓红,张烜铭,马进琴,陈凤鸣,&高艳红.(2013).土壤碳矿化潜力对沙坡头人工固沙植被演变的响应.生态学杂志,32(6),1371-1377.
MLA	周玉燕,et al."土壤碳矿化潜力对沙坡头人工固沙植被演变的响应".生态学杂志 32.6(2013):1371-1377.