东北黑土区侵蚀小流域不同土地利用下土壤理化性质数据集（2018）

本数据集主要包含东北黑土区侵蚀小流域不同侵蚀、开垦年限与耕作模式下土壤理化性质及其隶属度的变化。数据集选取九三鹤北流域8号小流域的中游和上游区域为小流域尺度采样区。采集不同土地利用方式（樟子松乔木林地、沙棘子灌木林地和玉米地（耕作60年左右））、开垦年限（未开垦林地（白杨树林地）和开垦41年、50年和65年的农地）、耕作方式（横坡垄作和顺坡垄作农地）与侵蚀强度（无侵蚀区、轻度侵蚀区、中度侵蚀区、重度侵蚀区和沉积区）处理下0-15、15-30、30-50、50-70和70-100 cm土层土壤样品，测定土壤样品颗粒组成、饱和导水率、磁化率、有机质、总氮、总磷、速效钾、速效氮、速效磷及pH 值等指标。

This dataset primarily documents the variations in soil physicochemical properties and their membership degrees under different erosion degrees, cultivation durations and tillage patterns in eroded small watersheds of the black soil region in Northeast China. The sampling areas at small watershed scale are selected from the middle and upper reaches of the 8th small watershed within the Jiuji Hebei Watershed. Soil samples were collected from soil layers of 0-15 cm, 15-30 cm, 30-50 cm, 50-70 cm and 70-100 cm under various treatments including land use types (Pinus sylvestris var. mongolica forest, Hippophae rhamnoides shrubland, and maize field with approximately 60 years of cultivation), cultivation years (uncultivated forest land (Populus woodland), and farmland reclaimed for 41, 50 and 65 years), tillage methods (farmlands under contour ridge tillage and downslope ridge tillage) and erosion intensities (non-eroded area, slight erosion area, moderate erosion area, severe erosion area and sediment deposition area). Multiple indicators were measured for the collected soil samples, including soil particle composition, saturated hydraulic conductivity, magnetic susceptibility, soil organic matter, total nitrogen, total phosphorus, available potassium, available nitrogen, available phosphorus and pH value.