Abiotic and biotic factors modulate plant biomass and root/shoot (R/S) ratios in grassland on the Loess Plateau, China
文献类型：期刊论文
| 作者 | An, SS (reprint author), Northwest A&F Univ, State Key Lab Soil Eros & Dryland Farming Loess P, Rd Xinong 26, Yangling 712100, Shaanxi, Peoples R China.; Yang Yang2; Yanxing Dou1; Shaoshan An1,2; Zhaolong Zhu1 |
| 刊名 | SCIENCE OF THE TOTAL ENVIRONMENT
 |
| 出版日期 | 2018 |
| 卷号 | 636页码:621-631 |
| 关键词 | Plant Biomass Root/shoot Ratio Principal Component Analysis Structural Equation Modeling Grassland Loess Plateau |
| ISSN号 | 0048-9697 |
| DOI | 10.1016/j.scitotenv.2018.04.260 |
| 文献子类 | Article |
| 英文摘要 | Plant biomass and the root/shoot ratio (R/S) are key parameters for estimating terrestrial ecosystem carbon (C) stocks. However, how environmental driving factors (abiotic and biotic factors) modulate plant biomass and R/S has not been well investigated on the Loess Plateau. Here, we tested the impacts of abiotic and biotic driving factors on plant biomass and R/S and whether they are in accordance with optimal partitioning theory in natural grassland in this region. The results showed that above-ground biomass (AGB) and below-ground biomass (BGB) were 63.96 g.m(-2) and 311.18 g.m(-2), respectively, and that R/S ranged from 0.13 to 0.46, with high spatial heterogeneity. There was a strong positive linear relationship between AGB and BGB (p < 0.05) in accordance with optimal partitioning theory. A principal component analysis (PCA) indicated that the topographic properties (Slope position, Slope gradient and Altitude) were negatively correlated with the soil physical properties (Ec, Electric conductivity; BD, Bulk density; ST, Soil temperature; and SM, Soil moisture) and positively correlated with the soil chemical properties (SOC, Soil organic carbon; TN, Total nitrogen; SMBC, Soil microbial biomass carbon and SMBN, Soilmicrobial biomass nitrogen), while soil total phosphorus (TP) was not correlated with the soil physical properties (p > 0.05). Structural equation modeling (SEM) suggested that R/S is indirectly driven by plant properties (Height, Density, Coverage), which are determined by soil and topographic properties. However, only 5% of R/S was explained by the soil physical properties and topographic properties, suggesting that these factors had no significant effect on R/S. The data do, however, provide information for quantifying C stocks in natural grassland on the Loess Plateau. Further, ecologists should focus on mechanistic and fresh approaches to understanding the abiotic and biotic factors influencing plant biomass and R/S. (C) 2018 Elsevier B.V. All rights reserved. |
| 学科主题 | Environmental Sciences & Ecology |
| 出版地 | PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS |
| 语种 | 英语 |
| WOS记录号 | WOS:000436599000061 |
| 出版者 | ELSEVIER SCIENCE BV |
| 资助机构 | National Natural Science Foundation of China [41671280, 41771317] ; National Natural Science Foundation of China [41671280, 41771317] ; Special-Funds of Scientific Research Programs of the State Key Laboratory of Soil Erosion and Dryland Farming on the Loess Plateau [A314021403-C6] ; Special-Funds of Scientific Research Programs of the State Key Laboratory of Soil Erosion and Dryland Farming on the Loess Plateau [A314021403-C6] ; National Natural Science Foundation of China [41671280, 41771317] ; National Natural Science Foundation of China [41671280, 41771317] ; Special-Funds of Scientific Research Programs of the State Key Laboratory of Soil Erosion and Dryland Farming on the Loess Plateau [A314021403-C6] ; Special-Funds of Scientific Research Programs of the State Key Laboratory of Soil Erosion and Dryland Farming on the Loess Plateau [A314021403-C6] |
| 源URL | [http://ir.iswc.ac.cn/handle/361005/8183]  |
| 专题 | 水保所科研产出--SCI_2018--SCI |
| 通讯作者 | An, SS (reprint author), Northwest A&F Univ, State Key Lab Soil Eros & Dryland Farming Loess P, Rd Xinong 26, Yangling 712100, Shaanxi, Peoples R China. |
| 作者单位 | 1.Northwest A&F Univ, State Key Lab Soil Eros & Dryland Farming Loess P, Rd Xinong 26, Yangling 712100, Shaanxi, Peoples R China 2.Northwest A&F Univ, Coll Nat Resource & Environm, Yangling 712100, Shaanxi, Peoples R China |
| 推荐引用方式 GB/T 7714 | An, SS ,Yang Yang,Yanxing Dou,et al. Abiotic and biotic factors modulate plant biomass and root/shoot (R/S) ratios in grassland on the Loess Plateau, China[J]. SCIENCE OF THE TOTAL ENVIRONMENT,2018,636:621-631. |
| APA | An, SS ,Yang Yang,Yanxing Dou,Shaoshan An,&Zhaolong Zhu.(2018).Abiotic and biotic factors modulate plant biomass and root/shoot (R/S) ratios in grassland on the Loess Plateau, China.SCIENCE OF THE TOTAL ENVIRONMENT,636,621-631. |
| MLA | An, SS ,et al."Abiotic and biotic factors modulate plant biomass and root/shoot (R/S) ratios in grassland on the Loess Plateau, China".SCIENCE OF THE TOTAL ENVIRONMENT 636(2018):621-631. |
入库方式： OAI收割
来源：水土保持研究所
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