干旱区生态环境知识资源中心(Arid): 温度对生物土壤结皮斑块土壤氮矿化作用的影响

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	温度对生物土壤结皮斑块土壤氮矿化作用的影响
其他题名	Effects of Temperature on Soil Net Nitrogen Mineralization under Different Biological Soil Crusts in Shapotou,Northern China
	虎瑞 1; 王新平1 ; 张亚峰 1; 潘颜霞 1; 石勇 2; 刘美玲 2
来源期刊	中国沙漠
ISSN	1000-694X
出版年	2013
卷号	33 期号:2 页码:522-528
中文摘要	以腾格里沙漠东南缘天然植被区藓类结皮、藻地衣结皮斑块荒漠土壤为研究对象,采用原状土培养法,在人工气候箱中设置不同温度(-10、5、15、25、35、40℃)培养14d,测定土壤样品在培养前后NH_4~+-N和NO_3~--N含量,分析两种生物土壤结皮斑块土壤净硝化和净矿化速率对温度的响应。结果表明:①低温培养条件下(-10~15℃)土壤氮转化以固持态为主,随着温度升高,尤其当温度超过25℃后,藓类结皮、藻地衣结皮斑块土壤净硝化和净氮矿化速率显著提高(p<0.05);②同一温度培养下,以藓类结皮发育为主的土壤氮转化水平较高,净硝化速率和净氮矿化速率以及无机氮的积累明显大于以藻地衣结皮发育为主的土壤;③两种生物土壤结皮斑块土壤净氮转换速率(硝化和矿化)Q_(10)值在2.46~3.33间波动,其中藓类结皮斑块土壤氮转换对温度的敏感性较高。此外,在土壤氮总矿化过程中,硝化过程具有较强的温度敏感性。高温促进了土壤净氮矿化水平,增加土壤氮有效性,因此可能会对荒漠生态系统的初级生产力产生正向影响作用。
英文摘要	Effects of temperature on soil net nitrogen transformation rates (nitrification and mineralization) under moss-covered soil and algae-lichen-covered soil were evaluated by measuring the concentrations of NH_4~+ -N and NO_3~- -N of undisturbed soil cores incubated in artificial chamber after 14 days of incubation with a temperature gradient of-10, 5, 15, 25, 35, 40 ℃. Results showed that: (1) immobilization was the main form in the nitrogen transformation (nitrification and mineralization) under the lower incubation temperatures (- 10~15℃), the net nitrification and mineralization rates increased significantly (p< 0. 05) with increasing temperature, especially when the temperature surpassed 25℃; (2) the moss-dominated soil facilitated the nitrogen transformation, the rates of net nitrification, nitrogen mineralization, and the contents of inorganic nitrogen in moss-dominated soil were higher than in algae-lichen-dominated soil; (3) the Q_(10) values of nitrogen transformation rates ranged from 2. 46 to 3. 33. In addition, the net nitrogen transformation rates of moss-dominated soil were more sensitive to temperature variation than algae-lichen-covered soil. Concerning the whole nitrogen transformation process, nitrification was more sensitive to temperature than mineralization. Higher temperature is beneficial to soil net nitrogen mineralization rate and the biological soil crusts can enhance the availability of nitrogen, which may affect the primary productivity in desert ecosystems.
中文关键词	生物土壤结皮 ; 净硝化速率 ; 净氮矿化速率 ; 温度
英文关键词	biological soil crusts net nitrification rate net nitrogen mineralization rate temperature
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:4804637
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/2XILL650/230588
作者单位	1.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; 2.中国科学院寒区旱区环境与工程研究所植物逆境生理生态与生物技术实验室, 兰州, 甘肃 730000, 中国
推荐引用方式 GB/T 7714	虎瑞,王新平,张亚峰,等. 温度对生物土壤结皮斑块土壤氮矿化作用的影响[J]. 中国科学院西北生态环境资源研究院,2013,33(2):522-528.
APA	虎瑞,王新平,张亚峰,潘颜霞,石勇,&刘美玲.(2013).温度对生物土壤结皮斑块土壤氮矿化作用的影响.中国沙漠,33(2),522-528.
MLA	虎瑞,et al."温度对生物土壤结皮斑块土壤氮矿化作用的影响".中国沙漠 33.2(2013):522-528.