Effects of the sampling spacing on the spatial variability in soil organic carbon, total nitrogen, and total phosphorus across a semiarid watershed
文献类型：期刊论文
| 作者 | Zhang, Pingping1,2; Wang, Yunqiang1,2,3; Zhang, Xingchang4,5 |
| 刊名 | ARCHIVES OF AGRONOMY AND SOIL SCIENCE
 |
| 出版日期 | 2020-07-26 |
| 页码 | 16 |
| 关键词 | Geostatistics maximum sampling distance sampling strategy scale spatial heterogeneity |
| ISSN号 | 0365-0340 |
| DOI | 10.1080/03650340.2020.1795641 |
| 通讯作者 | Wang, Yunqiang(wangyq@ieecas.cn) |
| 英文摘要 | Estimating coefficient of variation (CV) and semi-variogram from sample data requires an appropriate sampling spacing. Although some recommendations on the optimal spacings exist, they focused on the simulated random fields. We collected surface soil (0-20 cm) samples from 689 sites based on a regular grid of 100 x 100 m in the Liudaogou watershed (6.89 km(2)) on the Loess Plateau, China. We grouped the samples by re-sampling at six sampling spacings (100, 200, 300, 400, 500, and 600 m) to determine the characteristic changes in the spatial variability. The mean and CV values varied little among the different spacings (p< 0.05). The sampling spacing can be increased to 300 m if we want to know the possible relationships between OC, TN, and TP with the environmental factors. OC and TN were fitted best by the spherical model whereas TP was fitted best with an exponential model. The optimal model type unchanged as the spacing increased. The apparent parameters of semi-variogram did not differ from their true values when the spacing was less than 200 m for most cases (p< 0.05). Therefore, the spacing should not be greater than 200 m in order to clarify their spatial structures. |
| WOS关键词 | REGIONALIZED VARIABLES ; LOCAL ESTIMATION ; DESIGN ; VARIOGRAM ; SCALE ; INTERPOLATION ; GEOSTATISTICS ; ATTRIBUTES ; PREDICTION ; SCHEMES |
| 资助项目 | 'Ten Thousand Talent Program' for Young top-notch talent ; National Natural Science Foundation of China[41722106] ; National Natural Science Foundation of China[41971045] |
| WOS研究方向 | Agriculture |
| 语种 | 英语 |
| WOS记录号 | WOS:000552561100001 |
| 出版者 | TAYLOR & FRANCIS LTD |
| 资助机构 | 'Ten Thousand Talent Program' for Young top-notch talent ; National Natural Science Foundation of China |
| 源URL | [http://ir.ieecas.cn/handle/361006/15203]  |
| 专题 | 地球环境研究所_生态环境研究室 第四纪科学与全球变化卓越创新中心 |
| 通讯作者 | Wang, Yunqiang |
| 作者单位 | 1.Chinese Acad Sci, Inst Earth Environm, State Key Lab Loess & Quaternary Geol, Xian 71006, Shaanxi, Peoples R China 2.CAS Ctr Excellence Quaternary Sci & Global Change, Xian, Peoples R China 3.Beijing Normal Univ, Interdisciplinary Res Ctr Earth Sci Frontier, Beijing, Peoples R China 4.Chinese Acad Sci & Minist Water Resources, Inst Soil & Water Conservat, State Key Lab Soil Eros & Dryland Farming Loess P, Yangling, Shaanxi, Peoples R China 5.Grad Univ Chinese Acad Sci, Beijing, Peoples R China |
| 推荐引用方式 GB/T 7714 | Zhang, Pingping,Wang, Yunqiang,Zhang, Xingchang. Effects of the sampling spacing on the spatial variability in soil organic carbon, total nitrogen, and total phosphorus across a semiarid watershed[J]. ARCHIVES OF AGRONOMY AND SOIL SCIENCE,2020:16. |
| APA | Zhang, Pingping,Wang, Yunqiang,&Zhang, Xingchang.(2020).Effects of the sampling spacing on the spatial variability in soil organic carbon, total nitrogen, and total phosphorus across a semiarid watershed.ARCHIVES OF AGRONOMY AND SOIL SCIENCE,16. |
| MLA | Zhang, Pingping,et al."Effects of the sampling spacing on the spatial variability in soil organic carbon, total nitrogen, and total phosphorus across a semiarid watershed".ARCHIVES OF AGRONOMY AND SOIL SCIENCE (2020):16. |
入库方式： OAI收割
来源：地球环境研究所
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