干旱区生态环境知识资源中心(Arid): 石漠化山地植被恢复过程土壤团聚体氮分布及与氮素矿化关系研究

Arid

	石漠化山地植被恢复过程土壤团聚体氮分布及与氮素矿化关系研究
其他题名	Nitrogen Fraction Distributions and Impacts on Soil Nitrogen Mineralization in Different Vegetation Restorations of Karst Rocky Desertification
	胡宁 1; 马志敏 1; 蓝家程 2; 伍宇春 1; 陈高起 1; 傅瓦利 1; 文志林 1; 王文净 3
来源期刊	环境科学
ISSN	0250-3301
出版年	2015
卷号	36 期号:9 页码:3411-3421
中文摘要	为阐明岩溶石漠化区植被恢复对土壤氮素积累与供应的影响,分析了土壤各级团聚体不同形态氮库分配特征以及团聚体氮库与土壤氮素矿化之间的关系. 结果表明:①各样地土壤团聚体全氮、轻组氮、碱解氮、矿质氮含量基本上随团聚体粒径减小而升高,峰值出现在<0.25 mm粒径. 除矿质氮外,各种氮形态在不同样地之间,总体上表现为弃耕地<草地<灌丛地<灌乔林地<乔木林地、人工金银花地<人工林地. ②各粒径团聚体有机氮库容量受团聚体粒径质量分数控制,其中5~10 mm、 2~5 mm粒径团聚体有机氮库容量较大,土壤氮主要贮存于大团聚体中,大团聚体对土壤碳、氮的贮存有重要意义. ③团聚体全氮贮量中,0.25~1 mm、 5~10 mm、 2~5 mm粒径对土壤净氮矿化量贡献大,其它粒径贡献较小. 随植被恢复进程,土壤中>5 mm粒径团聚体质量分数逐渐提高,大团聚体氮贮量相应提高,在增强土壤供氮能力的同时,加强了对有机氮的贮存与保护.
英文摘要	In order to illuminate the impact on soil nitrogen accumulation and supply in karst rocky desertification area, the distribution characteristics of soil nitrogen pool for each class of soil aggregates and the relationship between aggregates nitrogen pool and soil nitrogen mineralization were analyzed in this study. The results showed that the content of total nitrogen, light fraction nitrogen, available nitrogen and mineral nitrogen in soil aggregates had an increasing tendency along with the descending of aggregate-size, and the highest content was occurred in <0.25 mm. The content of nitrogen fractions for all aggregate-classes followed in the order of abandoned land5mm and 2-5 mm classes, and the others were the smallest. With the positive vegetation succession, the weight percentage of>5 mm aggregate-size classes was improved and the nitrogen storage of macro-aggregates also was increased. Accordingly, the capacity of soil supply mineral nitrogen and storage organic nitrogen were intensified.
中文关键词	植被恢复 ; 岩溶石漠化 ; 土壤团聚体 ; 土壤有机氮 ; 土壤氮矿化
英文关键词	vegetation restoration rocky desertification soil aggregates soil organic nitrogen soil nitrogen mineralization
语种	中文
国家	中国
收录类别	CSCD
WOS类目	ENVIRONMENTAL SCIENCES
WOS研究方向	Environmental Sciences & Ecology
CSCD记录号	CSCD:5502397
来源机构	贵州师范大学
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/232915
作者单位	1.西南大学地理科学学院, 三峡库区生态环境教育部重点实验室, 重庆 400715, 中国; 2.贵州师范大学中国南方喀斯特研究院, 贵阳, 贵州 550001, 中国; 3.河南省新乡市地震局, 新乡, 河南 453000, 中国
推荐引用方式 GB/T 7714	胡宁,马志敏,蓝家程,等. 石漠化山地植被恢复过程土壤团聚体氮分布及与氮素矿化关系研究[J]. 贵州师范大学,2015,36(9):3411-3421.
APA	胡宁.,马志敏.,蓝家程.,伍宇春.,陈高起.,...&王文净.(2015).石漠化山地植被恢复过程土壤团聚体氮分布及与氮素矿化关系研究.环境科学,36(9),3411-3421.
MLA	胡宁,et al."石漠化山地植被恢复过程土壤团聚体氮分布及与氮素矿化关系研究".环境科学 36.9(2015):3411-3421.