Determination of Soil Texture by Laser Diffraction Method
文献类型：SCI/SSCI论文
| 作者 | Yang X. L.; Zhang, Q. Y.; Li, X. Z.; Jia, X. X.; Wei, X. R.; Shao, M. A. |
| 发表日期 | 2015 |
| 关键词 | particle-size distribution sieve-pipette method organic-carbon sediments distributions diffractometry scattering conversion analyzer |
| 英文摘要 | The laser-diffraction method (LDM) can rapidly determine soil particlesize distributions (PSDs), but LDM-derived PSDs cannot be directly used to classify soil textures by referring to the standards of the classical sieve-pipette method (SPM). Our objectives were to explore calibration models for converting PSD data from LDM (volume, %) to SPM (mass, %), and to evaluate the precision of textural classification by using LDM data. We determined the PSDs using both methods for 235 soil samples of various textures collected from three typical land uses, on the Loess Plateau of China. The LDM generally underestimated clay fractions by an average of 45.1%, and overestimated silt fractions by an average of 18.3% compared with SPM. Differences in PSD data between the two methods, indicated by coefficient Cs, increased with increasing clay contents for the 235 samples (P < 0.05). Three calibration models could, however, convert the clay, silt, and sand contents from the volume percentage (LDM) to the mass percentage (SPM). After the conversion, the mean coefficient C between the two methods decreased from 7.9 to 4.1% for the validation samples (n = 78). The distributions of soil textures within the USDA textural triangle agreed well in 71 of the 78 samples, for measured and converted PSD data. The three types of land use did not affect the differences between measured and converted PSD data (P > 0.05). Soil textures can thus be rapidly determined by converting PSD data from the faster volume-based LDM to data equivalent to the mass-based SPM, independent of land-use type. |
| 出处 | Soil Science Society of America Journal |
| 卷 | 79 |
| 期 | 6 |
| 页 | 1556-1566 |
| 语种 | 英语 |
| ISSN号 | 0361-5995 |
| DOI标识 | 10.2136/sssaj2015.04.0164 |
| 源URL | [http://ir.igsnrr.ac.cn/handle/311030/43586]  |
| 专题 | 地理科学与资源研究所_历年回溯文献 |
| 推荐引用方式 GB/T 7714 | Yang X. L.,Zhang, Q. Y.,Li, X. Z.,et al. Determination of Soil Texture by Laser Diffraction Method. 2015. |
入库方式： OAI收割
来源：地理科学与资源研究所
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