IEECAS OpenIR  > 黄土与第四纪地质国家重点实验室(2010~)
Soil Carbon, Nitrogen and Microbial Dynamics of Pasturelands: Impacts of Grazing Intensity and Planting Systems
Wang, Y (Wang Yi)[ 1,2 ]; Duan, WX (Duan Wen-Xia)[ 2,3 ]; Tu, C (Tu, C.)[ 2 ]; Washburn, S (Washburn, S.)[ 4 ]; Cheng, L (Cheng Lei)[ 2 ]; Hu, S (Hu, S.)[ 2 ]
2014-06-15
Source PublicationPEDOSPHERE
Volume24Issue:3Pages:408-416
Subtype期刊论文
Abstract

Management intensity critically influences the productivity and sustainability of pasture systems through modifying soil microbes, and soil carbon (C) and nutrient dynamics; however, such effects are not well understood yet in the southeastern USA. We examined the effects of grazing intensity and grass planting system on soil C and nitrogen (N) dynamics, and microbial biomass and respiration in a long-term field experiment in Goldsboro, North Carolina, USA. A split-plot experiment was initiated in 2003 on a highly sandy soil under treatments of two grass planting systems (ryegrass rotation with sorghum-sudangrass hybrid and ryegrass seeding into a perennial bermudagrass stand) at low and high grazing densities. After 4 years of continuous treatments, soil total C and N contents across the 0-30 cm soil profile were 24.7% and 17.5% higher at the high than at the low grazing intensity, likely through promoting plant productivity and C allocation belowground as well as fecal and urinary inputs. Grass planting system effects were significant only at the low grazing intensity, with soil C, N, and microbial biomass and respiration in the top 10 cm being higher under the ryegrass/bermudagrass than under the ryegrass/sorghum-sudangrass hybrid planting systems. These results suggest that effective management could mitigate potential adverse effects of high grazing intensities on soil properties and facilitate sustainability of pastureland.

Keywordc Allocation Grass Species Microbial Respiration Microbial Biomass Pastureland Sustainability Plant Productivity
Indexed BySCIE
Language英语
Document Type期刊论文
Identifierhttp://ir.ieecas.cn/handle/361006/9806
Collection黄土与第四纪地质国家重点实验室(2010~)
Corresponding AuthorTu, C (Tu, C.)[ 2 ]
Affiliation1.State Key Laboratory of Loess and Quaternary Geology, Institute of Earth Environment, Chinese Academy of Sciences, Xi’an 710075(China);
2.Department of Plant Pathology, North Carolina State University, Raleigh NC27695-7616 (USA);
3.Sichuan Tourism University, Chengdu 610100 (China);
4.Department of Animal Science, North Carolina State University, Raleigh NC27695-7621 (USA)
Recommended Citation
GB/T 7714
Wang, Y ,Duan, WX ,Tu, C ,et al. Soil Carbon, Nitrogen and Microbial Dynamics of Pasturelands: Impacts of Grazing Intensity and Planting Systems[J]. PEDOSPHERE,2014,24(3):408-416.
APA Wang, Y ,Duan, WX ,Tu, C ,Washburn, S ,Cheng, L ,&Hu, S .(2014).Soil Carbon, Nitrogen and Microbial Dynamics of Pasturelands: Impacts of Grazing Intensity and Planting Systems.PEDOSPHERE,24(3),408-416.
MLA Wang, Y ,et al."Soil Carbon, Nitrogen and Microbial Dynamics of Pasturelands: Impacts of Grazing Intensity and Planting Systems".PEDOSPHERE 24.3(2014):408-416.
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