Improved soil surface nitrogen balance method for assessing nutrient use efficiency and potential environmental impacts within an alpine meadow dominated region
文献类型：期刊论文
| 作者 | Li, Ying2; Li, Baolin1,2; Yuan, Yecheng2; Liu, Yan2; Li, Rui2; Liu, Wei2 |
| 刊名 | ENVIRONMENTAL POLLUTION
 |
| 出版日期 | 2023-05-15 |
| 卷号 | 325页码:121446 |
| 关键词 | Nitrogen budget Nitrogen surplus Alpine meadow Riverine export Root allocation Nutrient resorption |
| ISSN号 | 0269-7491 |
| DOI | 10.1016/j.envpol.2023.121446 |
| 文献子类 | Article |
| 英文摘要 | The soil surface nitrogen balance (SSNB) method is commonly used to assess the nutrient use efficiency (NUE) of agricultural systems and any associated potential environmental impacts. However, the nitrogen flow of wide natural grasslands and other natural areas differ from that of artificial croplands and mown grasslands. In this study, we integrated root growth and the important nutrient resorption process into the SSNB model and used the improved model to clarify the nitrogen (N) flow and balance in the Three Rivers Headwater Region (TRHR)-an area dominated by alpine meadows-from 2012-2019. In the grassland system, the N surplus (Delta N) was 0.274 g m- 2 year -1, and root return (BLD) dominated the N input, accounting for 67% of the total input (3.924 g m- 2 year -1). N resorption was the main internal N flow in the grassland system (1.079 g m- 2 year -1), and 30% of grassland uptake (NUP- grass). The Delta N of the agricultural system was 1.097 g m- 2 year -1, which was four times that of the grassland, and chemical fertilizer was the largest input, accounting for 84% of the total input. The NUE in grassland was 93%, which suggests a risk of soil mining and degradation, while that of cropland was 76% and within an ideal range. The Delta N provides a robust measure of river N export, the TRHR was divided into three catchments, and the export coefficient was 16.14%-55.68%. The results of this study show that the improved SSNB model can be applied to a wide range of natural grasslands that have high root biomass and resorption characteristics. |
| WOS关键词 | BIOMASS ALLOCATION ; TIBETAN PLATEAU ; RESORPTION ; LEAVES ; CARBON ; LEAF ; TRANSLOCATION ; PRODUCTIVITY ; VARIABILITY ; ECOSYSTEMS |
| WOS研究方向 | Environmental Sciences & Ecology |
| WOS记录号 | WOS:000955088500001 |
| 出版者 | ELSEVIER SCI LTD |
| 源URL | [http://ir.igsnrr.ac.cn/handle/311030/190479]  |
| 专题 | 资源与环境信息系统国家重点实验室_外文论文 |
| 作者单位 | 1.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 2.Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, State Key Lab Resources & Environm Informat Syst, Beijing 100101, Peoples R China 3.Jiangsu Ctr Collaborat Innovat Geog Informat Resou, Nanjing 210023, Peoples R China |
| 推荐引用方式 GB/T 7714 | Li, Ying,Li, Baolin,Yuan, Yecheng,et al. Improved soil surface nitrogen balance method for assessing nutrient use efficiency and potential environmental impacts within an alpine meadow dominated region[J]. ENVIRONMENTAL POLLUTION,2023,325:121446. |
| APA | Li, Ying,Li, Baolin,Yuan, Yecheng,Liu, Yan,Li, Rui,&Liu, Wei.(2023).Improved soil surface nitrogen balance method for assessing nutrient use efficiency and potential environmental impacts within an alpine meadow dominated region.ENVIRONMENTAL POLLUTION,325,121446. |
| MLA | Li, Ying,et al."Improved soil surface nitrogen balance method for assessing nutrient use efficiency and potential environmental impacts within an alpine meadow dominated region".ENVIRONMENTAL POLLUTION 325(2023):121446. |
入库方式： OAI收割
来源：地理科学与资源研究所
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