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

本数据是全国范围的土壤粉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米空间分辨率土壤粉粒含量数据，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 is a high-resolution spatial distribution map of soil silt content at the national scale of China, with a horizontal spatial resolution of 250 m. It encompasses six soil layer depths: 0–5, 5–15, 15–30, 30–60, 60–100, and 100–200 cm. Generated using digital soil mapping techniques including Geographically Weighted Regression (GWR) and Random Forest (RF), this dataset is based on soil profile sampling sites acquired from the recent *National Soil Series Survey and Compilation of Soil Series of China* Project. The mechanical composition classification adheres to the US standard: clay (<0.002 mm); silt (0.05–0.002 mm); sand (0.05–2 mm). Compared with existing soil maps and related soil datasets, this product significantly enhances both accuracy and spatial detail, and better characterizes the spatial variability of soil properties across China. It can be widely applied across multiple disciplines such as soil science, agriculture, ecology, hydrology, climatology, and environmental science, and constitutes an important contribution to the GlobalSoilMap.net Global Soil Mapping Scientific Program.

搜集汇总

背景与挑战

背景概述

该数据集是中国全国范围内的高分辨率土壤粉粒含量空间分布图，空间分辨率为250米，涵盖2010-2018年六个不同土层深度的数据。基于5000多个土壤剖面调查资料，采用先进的数字土壤制图方法生成，显著提高了土壤属性空间变异的表征精度，适用于土壤、农业、生态等多个学科领域。