干旱区生态环境知识资源中心(Arid): 沙坡头地区藓类结皮土壤净氮矿化作用的季节动态

Arid

	沙坡头地区藓类结皮土壤净氮矿化作用的季节动态
其他题名	Seasonal dynamics of soil net nitrogen mineralization under moss crust in Shapotou region,northern China
	虎瑞; 王新平; 潘颜霞; 张亚峰; 张浩; 陈宁
来源期刊	应用生态学报
ISSN	1001-9332
出版年	2015
卷号	26 期号:4 页码:1106-1112
中文摘要	以腾格里沙漠东南缘天然植被区藓类结皮和无结皮土壤为对象,采用野外原状土柱封顶埋管法对无机氮库和净氮转化速率的季节动态特征进行研究.结果表明:藓类结皮和无结皮土壤有效氮含量和净氮转化速率存在明显的季节变化特征,不同月份间差异显著.在非生长季,3和10月土壤有效氮含量和净氮转化速率显著高于其他月,氮矿化过程以固持态为主,两样地间土壤净氮转化速率无显著差异;在生长季,土壤有效氮含量和净氮转化速率显著增加,68月时达到峰值,分别为17.18 mg·kg~(-1)和0.11 mg·kg~(-1)·d~(-1).两样地土壤净硝化速率和净氮矿化速率在各月间差异显著,均表现为藓类结皮土壤>无结皮土壤.土壤铵态氮和硝态氮含量4和5月时表现为藓类结皮土壤(2.66和3.16 mg·kg~(-1))>无结皮土壤(1.02和2.37 mg·kg~(-1));69月则表现为无结皮土壤(7.01和7.40 mg·kg~(-1))>藓类结皮土壤(6.39和6.36 mg·kg~(-1)).藓类结皮的繁衍与拓殖能够调节土壤有效氮含量、促进土壤氮矿化过程,是影响土壤氮素循环的重要生物因素.
英文摘要	Seasonal variations of soil inorganic nitrogen (N) pool and net N transformation rate in moss-covered soil and in the bare soil were comparatively observed by incubating intact soil columns with parafilm capping in the field in a natural vegetation area of Shapotou,southeastern fringe of the Tengger Desert. We found pronounced seasonal variations in soil available N content and net N transformation rate in both moss-covered soil and bare soil,with significant differences among different months. In non-growing season,soil available N content and net N transformation rate were significantly higher in March and October than in other months. Furthermore,immobilization was the dominant form of N mineralization,and no significant difference in net soil N mineralization rate was found between the two sampling soils. In growing season,soil available N content and net N transformation rate markedly increased and reached their peak values during June to August (17. 18 mg·kg~(-1) and 0.11 mg·kg~(-1)· d~(-1),respectively). Both soil net nitrification and N mineralization rates in moss-covered soil were significantly higher than in bare soil. Soil ammonium and nitrate N content in April and May were higher in moss-covered soil (2.66 and 3.16 mg·kg~(-1),respectively)than in bare soil (1.02 and 2.37 mg·kg~(-1),respectively);while the tendency was the converse in June and September,with 7.01 mg·kg~(-1) for soil ammonium content and 7.40 mg ·kg~(-1) for nitrate N content in bare soil,and they were 6.39 and 6.36 mg · kg~(-1) in moss-covered soil,respectively.Therefore,the existence and succession of moss crusts could be considered as one of the important biological factors affecting soil N cycling through regulating soil available N content and promoting soil N mineralization process.
中文关键词	藓类结皮 ; 土壤净氮矿化 ; 封顶埋管法 ; 季节动态
英文关键词	moss crust net soil N mineralization rate close-top tube incubation seasonal dynamics
语种	中文
国家	中国
收录类别	CSCD
WOS类目	AGRICULTURE MULTIDISCIPLINARY
WOS研究方向	Agriculture
CSCD记录号	CSCD:5391457
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/2XILL650/233575
作者单位	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	虎瑞,王新平,潘颜霞,等. 沙坡头地区藓类结皮土壤净氮矿化作用的季节动态[J]. 中国科学院西北生态环境资源研究院,2015,26(4):1106-1112.
APA	虎瑞,王新平,潘颜霞,张亚峰,张浩,&陈宁.(2015).沙坡头地区藓类结皮土壤净氮矿化作用的季节动态.应用生态学报,26(4),1106-1112.
MLA	虎瑞,et al."沙坡头地区藓类结皮土壤净氮矿化作用的季节动态".应用生态学报 26.4(2015):1106-1112.