BIOMASS AND NITROGEN RESPONSES TO GRAZINGINTENSITY IN AN ALPINE MEADOW ON THE EASTERNTIBETAN PLATEAU
文献类型：期刊论文
| 作者 | Yongheng GAO ; Peng LUO ; Ning WU ; Shaoliang YI ; Huai CHEN |
| 刊名 | Polish Journal of Ecology
 |
| 出版日期 | 2007 |
| 卷号 | 55期号:3页码:469-479 |
| 关键词 | grassland grazing nitrogen plant productivity Tibetan Plateau |
| 产权排序 | 1 |
| 合作状况 | 其它 |
| 中文摘要 | This study was conducted to examine the seasonal dynamics of biomass and plant nitrogen (N) content under three grazing intensities (light grazing – LG: 1.2, moderate grazing – MG: 2.0, and heavy grazing – HG: 2.9 yaks ha–1) in representative alpine meadow on the eastern Tibetan Plateau. Differentiation in grazing intensity in the study area started since 1997 and has continued to the present time. Plant samples were collected in the middle of June, August and September. The highest aboveground biomass occurred at the MG site for both August and September. Over the growing season, belowground biomass (0–30 cm) increased as grazing intensity increased. The total belowground biomass averaged over all sampling dates was 1226, 1908 and 2244 g m–2 for LG site, MG site and HG site, which accounted for 75, 81 and 88% of total biomass, respectively. The results suggested that grazing intensity changed biomass allocation pattern between aboveground and belowground parts of plants. Higher grazing intensity resulted in higher N concentration in both live and dead aboveground biomass over the study period. Increased grazing intensity tended to increase plant N content averaged over all sampling dates, which were 17.9 g m–2, 23.8 g m–2 and 27.6 g m–2 in LG site, MG site and HG site. The results indicated that higher grazing intensity had a potential to increase the ecosystem pool of plant N. |
| 学科主题 | 生态研究 |
| 收录类别 | SCI |
| 语种 | 英语 |
| 公开日期 | 2016-02-26 |
| 源URL | [http://210.75.237.14/handle/351003/26629]  |
| 专题 | 成都生物研究所_生态研究 |
| 推荐引用方式 GB/T 7714 | Yongheng GAO,Peng LUO,Ning WU,et al. BIOMASS AND NITROGEN RESPONSES TO GRAZINGINTENSITY IN AN ALPINE MEADOW ON THE EASTERNTIBETAN PLATEAU[J]. Polish Journal of Ecology,2007,55(3):469-479. |
| APA | Yongheng GAO,Peng LUO,Ning WU,Shaoliang YI,&Huai CHEN.(2007).BIOMASS AND NITROGEN RESPONSES TO GRAZINGINTENSITY IN AN ALPINE MEADOW ON THE EASTERNTIBETAN PLATEAU.Polish Journal of Ecology,55(3),469-479. |
| MLA | Yongheng GAO,et al."BIOMASS AND NITROGEN RESPONSES TO GRAZINGINTENSITY IN AN ALPINE MEADOW ON THE EASTERNTIBETAN PLATEAU".Polish Journal of Ecology 55.3(2007):469-479. |
入库方式： OAI收割
来源：成都生物研究所
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