Grazing enhances soil nutrient effects: Trade-offs between aboveground and belowground biomass in alpine grasslands of the Tibetan Plateau
文献类型：期刊论文
| 作者 | Sun, Jian1; Ma, Baibing1,2; Lu, Xuyang3
|
| 刊名 | LAND DEGRADATION & DEVELOPMENT
 |
| 出版日期 | 2018-02-01 |
| 卷号 | 29期号:2页码:337-348 |
| 关键词 | biomass allocation climate elements grassland practice soil nutrient vegetation dynamic |
| ISSN号 | 1085-3278 |
| DOI | 10.1002/ldr.2822 |
| 英文摘要 | Understanding the impact of grazing patterns on grassland production is of fundamental importance for grassland conservation and management. The objective of this study is to obtain an understanding of the trade-offs between aboveground biomass and belowground biomass, which are influenced by environmental factors in free grazing (FG) and grazing exclusion (GE) alpine grasslands on the Tibetan Plateau. We explored the relationships between the trade-off and environmental factors using correlation analysis, a generalized additive model and a structural equation model, and then found that the key factors that determine trade-off showed differences in FG and GE grasslands and that the final structural equation modeling result explained that 96% (path coefficient=0.96) and 65% (path coefficient=0.65) of the variations in the trade-off were due to FG or GE classifications, respectively. The results demonstrated that soil organic carbon, soil carbon/soil nitrogen, and soil available nitrogen affect the trade-off between aboveground and belowground biomass in FG grasslands more obviously than in GE grasslands. However, the effects of growing season temperature on the trade-off were insignificant, -0.218 and -0.181 in FG and GE grasslands, respectively. FG increased the soil bulk density, which resulted in an alteration in the soil pore size distribution and a greater resistance to root penetration. In addition, FG affected the level of soil nutrition, which will affect the nitrogen mineralization of decomposition and absorption, as well as the root biomass. Consequently, this study can provide guidance to improve the quality of grassland. |
| 语种 | 英语 |
| WOS记录号 | WOS:000425100700015 |
| 出版者 | WILEY |
| 源URL | [http://ir.imde.ac.cn/handle/131551/21426]  |
| 专题 | 成都山地灾害与环境研究所_山地表生过程与生态调控重点实验室 |
| 通讯作者 | Sun, Jian; Lu, Xuyang |
| 作者单位 | 1.Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Key Lab Ecosyst Network Observat & Modelling, Synth Res Ctr Chinese Ecosyst Res Network, Beijing 100101, Peoples R China 2.Changan Univ, Sch Earth Sci & Resource, Xian 710000, Shaanxi, Peoples R China 3.Chinese Acad Sci, Inst Mt Hazards & Environm, Key Lab Mt Surface Proc & Ecol Regulat, Chengdu 610041, Sichuan, Peoples R China |
| 推荐引用方式 GB/T 7714 | Sun, Jian,Ma, Baibing,Lu, Xuyang. Grazing enhances soil nutrient effects: Trade-offs between aboveground and belowground biomass in alpine grasslands of the Tibetan Plateau[J]. LAND DEGRADATION & DEVELOPMENT,2018,29(2):337-348. |
| APA | Sun, Jian,Ma, Baibing,&Lu, Xuyang.(2018).Grazing enhances soil nutrient effects: Trade-offs between aboveground and belowground biomass in alpine grasslands of the Tibetan Plateau.LAND DEGRADATION & DEVELOPMENT,29(2),337-348. |
| MLA | Sun, Jian,et al."Grazing enhances soil nutrient effects: Trade-offs between aboveground and belowground biomass in alpine grasslands of the Tibetan Plateau".LAND DEGRADATION & DEVELOPMENT 29.2(2018):337-348. |
入库方式： OAI收割
来源：成都山地灾害与环境研究所
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