Long-term fencing improved soil properties and soil organic carbon storage in an alpine swamp meadow of western China
Long-term fencing improved soil properties and soil organic carbon storage in an alpine swamp meadow of western China
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DOI：
10.1007/s11104-010-0299-0
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发表时间：
2010-02
期刊：
影响因子：
4.9
通讯作者：
Gao-lin Wu;Zhen-Heng Liu;Lei Zhang;Ji-min Chen;Tianming Hu
中科院分区：
文献类型：
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作者：
Gao-lin Wu;Zhen-Heng Liu;Lei Zhang;Ji-min Chen;Tianming Hu
过度放牧对高山草甸的影响与其他地区的草地相似。围栏封育是保护高寒草甸的主要措施之一。然而，目前还不清楚围栏是否可以通过限制放牧来改善高寒草甸的土壤性质和土壤有机碳储量。我们研究了长期（9年）围栏对土壤性质，土壤有机碳和氮储量的影响，与持续放牧相比，在青藏高原，中国西北部的高寒沼泽草甸。我们的研究结果表明，围栏显着提高植被覆盖和地上生物量。围栏封育对土壤pH值、土壤容重和土壤含水量有显著影响。与放牧草地相比，长期围栏封育有利于土壤全氮、土壤有机质、土壤有机碳、土壤微生物生物量碳和土壤碳储量的增加。我们的研究表明，长期的围栏，以防止干扰可以大大影响土壤有机碳和氮储量方面放牧草地。因此，围栏封育是恢复青藏高原高寒草甸土壤碳氮贮量的有效途径。
Overgrazing significantly affects alpine meadows in ways similar to grasslands in other areas. Fencing to exclude grazers is one of the main management practices used to protect alpine meadows. However, it is not known if fencing can improve soil properties and soil organic carbon storage by restraining grazing in alpine meadows. We studied the long-term (nine-year) effects of fencing on soil properties, soil organic carbon and nitrogen storage compared with continued grazing in an alpine swamp meadow of the Qinghai–Tibetan Plateau, NW China. Our results showed that fencing significantly improved vegetation cover and aboveground biomass. There were significant effects of fencing on pH value, soil bulk density, and soil moisture. Long-term fencing favored the increase of soil total nitrogen, soil organic matter, soil organic carbon, soil microbial biomass carbon and soil carbon storage compared with grazed meadows. Our study suggests that long-term fencing to prevent disturbance could greatly affect soil organic carbon and nitrogen storage with regard to grazed meadows. Therefore, it is apparent from this study that fencing is an effective restoration approach of with regard to the soil’s storage ability for carbon and nitrogen in alpine meadow of the Qinghai–Tibetan Plateau.