中国1公里土壤砂粒含量数据（2010-2018，60-100cm）

自然土壤的矿物质都是由大小不同的土粒组成的，各个粒级在土壤中所占的相对比例或质量分数，称为土壤机械组成。土壤机械组成不仅是土壤分类的重要诊断指标，也是影响土壤水、肥、气、热状况，物质迁移转化及土壤退化过程研究的重要因素，还是土壤地理研究、与农业生产相关的土壤改良、土建工程和区域水分循环过程等研究的重要内容。本数据集是基于2010-2018全国土系调查数据，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1公里分辨率60-100cm的土壤砂粒含量数据，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）；

Minerals in natural soils are composed of soil particles of various sizes. The relative proportion or mass fraction of each particle size fraction in the soil is termed soil mechanical composition. Soil mechanical composition serves as a critical diagnostic indicator for soil classification, and is also a key factor influencing soil water, fertilizer, air and thermal regimes, material migration and transformation processes, as well as soil degradation studies. Additionally, it constitutes a core research subject for fields including soil geography, agricultural production-related soil improvement, civil engineering, and regional water cycle research. This dataset was developed using digital soil mapping methods such as geographically weighted regression and random forest, based on national soil series survey data collected between 2010 and 2018. It presents soil sand content data at a 1-kilometer spatial resolution for the 60–100 cm soil depth across China. The particle-size classification adheres to the US standard: clay < 0.002 mm; silt 0.05–0.002 mm; sand 0.05–2 mm.

搜集汇总

背景与挑战

背景概述

该数据集提供了2010-2018年中国范围内1公里分辨率的土壤砂粒含量数据，深度为60-100厘米，基于全国土系调查数据，采用地理加权回归和随机森林等数字土壤制图方法生成，机械组成划分遵循美国制标准。数据集具有高空间分辨率和可靠的建模质量，适用于土壤地理、农业改良和环境研究等领域。