干旱区生态环境知识资源中心(Arid): 青藏高原土壤可溶性氮组成特征

Arid

	青藏高原土壤可溶性氮组成特征
其他题名	Characteristics of soluble nitrogen in soils on the Tibetan Plateau, China
	王洁 1; 杨曦 1; 朱兆洲 1; 李鹤 1; 牛颖权 1; 刘小龙 1; 张伟 2; 李军 1
来源期刊	生态学杂志
ISSN	1000-4890
出版年	2015
卷号	34 期号:6 页码:1660-1666
中文摘要	对青藏高原不同海拔(2500~5500 m)、不同植被类型(高寒草原、高寒草甸、草地、林地、荒漠、盐碱地等)土壤可溶性氮的组成特征及其影响因素进行了研究。结果表明:青藏高原土壤总可溶性氮(TSN)含量丰富,以可溶性有机氮(SON)为主,SON占TSN的比例达50%以上,且硝态氮(NO_3~--N)占可溶性无机氮(SIN)比例显著高于铵态氮(NH_4~+-N),NO_3~--N占SIN的比例达60%以上。方差分析表明,不同海拔梯度间土壤可溶性氮含量差异显著,高寒草原与高寒草甸的TSN及SON含量显著高于其他植被类型。土壤PH与不同形态可溶性氮均呈负相关关系,是影响土壤不同形态可溶性氮的重要因素。逐步回归分析表明,对土壤NH_4~+-N影响最为显著的气候因子是生长季相对湿度,而对土壤NO_3~-N影响最为显著的气候因子是生长季温度。
英文摘要	An investigation on soil soluble nitrogen and its influence factors was carried out in different vegetation types (alpine steppe,alpine meadow,grassland,forest land,desert,and saline land) along different altitudes (2500-5500 m) on the Tibetan Plateau, China. The results showed that total soluble nitrogen (TSN) in the soils appeared at high levels, and the major form of soil soluble nitrogen was soluble organic nitrogen (SON),accounting for 50% of TSN. In addition ,the proportion of NO_3~--N to soluble inorganic nitrogen (SIN) was higher (60%) than that of NH_4~+ -N. Variance analysis showed that the difference of soil soluble nitrogen was significant at different altitudes, and TSN and SON in alpine steppe and alpine meadow were significantly higher than in the other vegetation types. Soil pH was negatively correlated with the different forms of soil soluble nitrogen, suggesting that soil pH was an important factor impacting soil soluble nitrogen. Stepwise regression analysis showed that air relative humidity and temperature in growing season were the most significant factors impacting soil NH_4~+-N and NO_3~--N, respectively.
中文关键词	青藏高原 ; 土壤可溶性氮 ; 植被类型 ; 海拔
英文关键词	Tibetan Plateau soil soluble nitrogen vegetation type altitude
语种	中文
国家	中国
收录类别	CSCD
WOS类目	PLANT SCIENCES
WOS研究方向	Plant Sciences
CSCD记录号	CSCD:5433074
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/233231
作者单位	1.天津师范大学, 天津市水资源与水环境重点实验室, 天津 300387, 中国; 2.贵州师范学院地理与旅游学院, 贵阳, 贵州 550018, 中国
推荐引用方式 GB/T 7714	王洁,杨曦,朱兆洲,等. 青藏高原土壤可溶性氮组成特征[J],2015,34(6):1660-1666.
APA	王洁.,杨曦.,朱兆洲.,李鹤.,牛颖权.,...&李军.(2015).青藏高原土壤可溶性氮组成特征.生态学杂志,34(6),1660-1666.
MLA	王洁,et al."青藏高原土壤可溶性氮组成特征".生态学杂志 34.6(2015):1660-1666.