Knowledge Resource Center for Ecological Environment in Arid Area
Effects of grazing on carbon and nitrogen in plants and soils in a semiarid desert grassland,China | |
An Hui; Li Guoqi | |
来源期刊 | Journal of Arid Land
![]() |
ISSN | 1674-6767 |
出版年 | 2015 |
卷号 | 7期号:3页码:341-349 |
英文摘要 | Grazing can modulate the feedback between vegetation and soil nutrient dynamics(carbon and nitrogen),altering the cycles of these elements in grassland ecosystems.For clarifying the impact of grazing on the C and N in plants and soils in the desert grassland of Ningxia,China,we examined the plant biomass,SOC(soil organic carbon),total soil N and stable isotope signatures of plants and soils from both the grazed and ungrazed sites.Significantly lower aboveground biomass,root biomass,litter biomass and vegetation coverage were found in the grazed site compared to the ungrazed site,with decreases of 42.0%,16.2%,59.4% and 30.0%,respectively.The effects of grazing on plant carbon,nitrogen,delta~(15)N and delta~(13)C values were uniform among species.The levels of plant carbon and nitrogen in grasses were greater than those in the forbs(except for the carbon of Cynanchum komarovii and Euphorbia esula).Root ~(15) N and ~(13) C values increased with grazing,while the responses of root carbon and nitrogen to grazing showed no consistent patterns.Root ~(15) N and ~(13) C were increased by 79.0% and 22.4% in the grazed site compared to the ungrazed site,respectively.The values of SOC and total N were significantly lower in the grazed than in the ungrazed sites for all sampling depths(0-10 and 10-20 cm),and values of SOC and total N at the surface(0-10 cm) were lower than those in the deeper soils(10-20 cm).Soil delta~(15)N values were not affected by grazing at any sampling depth,whereas soil delta~(13)C values were significantly affected by grazing and increased by 19.3% and 8.6% in the soils at 0-10 and 10-20 cm,respectively.The soil delta~(13)C values(-8.3 to -6.7) were higher than those for roots(-20.2 to -15.6) and plant tissues(-27.9 to -13.3).Our study suggests that grazing could greatly affect soil organic carbon and nitrogen in contrast to ungrazed grassland and that grazing appears to exert a negative effect on soil carbon and nitrogen in desert grassland. |
英文关键词 | grazing ~(15)N ~(13)C soil properties desert grassland plant properties |
类型 | Article |
语种 | 英语 |
开放获取类型 | Bronze |
收录类别 | CSCD |
WOS研究方向 | Agriculture |
CSCD记录号 | CSCD:5385823 |
资源类型 | 期刊论文 |
条目标识符 | http://119.78.100.177/qdio/handle/2XILL650/335463 |
作者单位 | An Hui, United Center for Ecology Research and Bioresource Exploitation in Western China, Ningxia University, Ministry of Education Key Laboratory for Restoration and Reconstruction of Degraded Ecosystem in Northwestern China, Yinchuan, Ningxia 750021, China.; Li Guoqi, United Center for Ecology Research and Bioresource Exploitation in Western China, Ningxia University, Ministry of Education Key Laboratory for Restoration and Reconstruction of Degraded Ecosystem in Northwestern China, Yinchuan, Ningxia 750021, China. |
推荐引用方式 GB/T 7714 | An Hui,Li Guoqi. Effects of grazing on carbon and nitrogen in plants and soils in a semiarid desert grassland,China[J],2015,7(3):341-349. |
APA | An Hui,&Li Guoqi.(2015).Effects of grazing on carbon and nitrogen in plants and soils in a semiarid desert grassland,China.Journal of Arid Land,7(3),341-349. |
MLA | An Hui,et al."Effects of grazing on carbon and nitrogen in plants and soils in a semiarid desert grassland,China".Journal of Arid Land 7.3(2015):341-349. |
条目包含的文件 | 条目无相关文件。 |
个性服务 |
推荐该条目 |
保存到收藏夹 |
导出为Endnote文件 |
谷歌学术 |
谷歌学术中相似的文章 |
[An Hui]的文章 |
[Li Guoqi]的文章 |
百度学术 |
百度学术中相似的文章 |
[An Hui]的文章 |
[Li Guoqi]的文章 |
必应学术 |
必应学术中相似的文章 |
[An Hui]的文章 |
[Li Guoqi]的文章 |
相关权益政策 |
暂无数据 |
收藏/分享 |
除非特别说明,本系统中所有内容都受版权保护,并保留所有权利。