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当前位置: 首页 > 文章 > 干湿交替强度和频率对香菇草—土壤系统无机氮及净氮矿化的影响 云南农业大学学报(自然科学) 2018 (3) 494-499
Position: Home > Articles > Effects of Drying-rewetting Intensity and Frequency on the Inorganic Nitrogen and Net Nitrogen Mineralization of Hydrocotyle Vulgaris-soil System Journal of Yunnan Agricultural University(Natural Science) 2018 (3) 494-499

干湿交替强度和频率对香菇草—土壤系统无机氮及净氮矿化的影响

作  者：
安菁;张晓雅;段牧莹;丁艳;蒋丽华;高俊琴
单  位：
北京林业大学自然保护区学院
关键词：
干湿交替;香菇草;硝态氮;铵态氮;净氮矿化
摘  要：
【目的】气候变化下降水模式改变对自然生态系统的影响已成为生态学研究的热点,本研究旨在探究降水模式改变下干湿交替强度和频率对土壤无机氮及氮矿化的影响。【方法】以香菇草为试验材料开展温室控制试验。试验设置了高、中和低3种干湿交替强度和频率共9种处理,测定了土壤铵态氮、硝态氮含量,分析了土壤净氮矿化和硝化速率。【结果】(1)干湿交替强度对香菇草—土壤系统的无机氮含量有极显著影响。干湿交替强度最低时,土壤铵态氮含量最高,而硝态氮含量最低;随干湿交替强度增加,土壤铵态氮含量下降,硝态氮含量增加。(2)干湿交替频率对香菇草—土壤系统的无机氮含量有极显著影响。随干湿交替频率增加,土壤铵态氮含量下降,而硝态氮含量增加。(3)干湿交替强度和频率对土壤无机氮及净氮矿化有显著的交互作用。【结论】干湿交替强度和频率的改变导致了香菇草—土壤系统无机氮含量、净氮矿化速率和硝化速率的变化,影响了土壤中氮素养分的有效性,进而影响植物—土壤系统氮循环。
译  名：
Effects of Drying-rewetting Intensity and Frequency on the Inorganic Nitrogen and Net Nitrogen Mineralization of Hydrocotyle Vulgaris-soil System
作  者：
AN Jing;ZHANG Xiaoya;DUAN Muying;DING Yan;JIANG Lihua;GAO Junqin;School of Nature Conservation, Beijing Forestry University;
单  位：
AN Jing%ZHANG Xiaoya%DUAN Muying%DING Yan%JIANG Lihua%GAO Junqin%School of Nature Conservation, Beijing Forestry University
关键词：
drying-rewetting;;Hydrocotyle vulgaris;;nitrate nitrogen;;ammonium nitrogen;;net nitrogen mineralization
摘  要：
[Purpose]Effects of altered precipitation patterns on natural ecosystems with climate change has already become a hot topic of ecological study. Our purpose was to reveal the effects of altered precipitation patterns on the inorganic nitrogen(N) and net N mineralization.[Method]We conducted a greenhouse experiment with H. vulgaris across three drying-rewetting intensities and frequencies. We analyzed the content of nitrate and ammonium, net N mineralization and nitrification rate of the soils.[Result](1) Drying-rewetting intensity significantly affected soil inorganic N content of H. vulgaris. In the lowest drying-rewetting intensity, the ammonium content was the highest and nitrate content was the lowest than other two treatments. With drying-rewetting intensity increased, ammonium content decreased while nitrate content increased.(2) Drying-rewetting frequency significantly affected soil inorganic N content of H. vulgaris. With drying-rewetting frequency increased, ammonium content decreased while nitrate content increased.(3) There was a significant interactive effect between drying-rewetting intensity and frequency on soil inorganic N and net N mineralization.[Conclusion]Our results suggested that altered drying-rewetting intensity and frequency can affect N availability and N cycle in plant-soil system, which indirectly affect the soil inorganic N, net N mineralization and nitrification rate of H. vulgaris.

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