中国高分辨率国家土壤信息格网基本属性数据集_250米土壤黏粒含量（2010-2018）

本数据是全国范围的土壤黏粒含量高分辨率空间分布图，水平空间分辨率为250m，垂直方向包括六个土层深度：0-5, 5-15, 15-30, 30-60, 60-100, 100-200cm。该数据集是基于近年“我国土系调查与《中国土系志》编制项目”获得的土壤剖面样点，采用地理加权回归、随机森林等数字土壤制图方法生成的中国250米空间分辨率土壤黏粒含量数据，机械组成划分使用美国制标准（黏粒<0.002mm；粉粒0.05-0.002mm；砂粒0.05-2mm）；。与现有土壤图和相关土壤数据集相比，显著提高了准确性和精细度，更好地表征了我国土壤属性的空间变异特征，可广泛应用于土壤、农业、生态、水文、气候、环境等多个学科领域，也是对“全球土壤制图科学计划”（GlobalSoilMap.net）的重要贡献。

This dataset provides high-resolution spatial distribution maps of soil clay content across China, with a horizontal spatial resolution of 250 meters. It covers six soil depth layers in the vertical dimension: 0–5, 5–15, 15–30, 30–60, 60–100, and 100–200 cm. This dataset was generated using digital soil mapping methods such as Geographically Weighted Regression (GWR) and Random Forest (RF), based on soil profile sampling points obtained from the recent national soil series survey and *Compilation of Chinese Soil Series* project. The mechanical composition classification follows the USDA standard: clay < 0.002 mm, silt 0.002–0.05 mm, and sand 0.05–2 mm. Compared with existing soil maps and related soil datasets, this product significantly improves accuracy and spatial detail, better characterizing the spatial variability of soil properties across China. It can be widely applied in multiple disciplines including soil science, agriculture, ecology, hydrology, climatology, environmental science and other related fields, and represents an important contribution to the Global Soil Mapping Scientific Program (GlobalSoilMap.net).

搜集汇总

背景与挑战

背景概述

该数据集是中国全国范围的土壤黏粒含量高分辨率空间分布图，水平空间分辨率为250米，垂直方向涵盖0-5厘米至100-200厘米共六个土层深度，基于2010-2018年野外调查的5000多个土壤剖面资料，采用地理加权回归和随机森林等数字土壤制图方法生成。与现有数据相比，该数据集显著提高了准确性和精细度，能更好表征中国土壤属性的空间变异特征，适用于土壤学、农业、生态、水文、气候和环境等多个学科领域的研究与应用。