XDA28070104 Dataset of Long-term Conservation Technology for Black Soil Plough Layer

To address the core problems in the Hailun Demonstration Area, such as the decline in topsoil organic matter content, thick plow pan, and poor soil profile structure, we developed a long-term conservation technology for the black soil plough layer through the research and application of new soil amendment/regulation products combined with appropriate tillage measures. This technology aims to rapidly thicken the black soil layer, increase humic substances, and improve plough layer structure, ultimately establishing a fertile, healthy, and sustainable medium-thick black soil plough layer to optimize topsoil fertility and increase grain yield.

A long-term conservation technical model for the black soil plough layer, focusing on deep organic carbon replenishment in medium-thick black soil, was constructed by using biochar as the core component coupled with various organic materials. After the implementation of the technology: The organic matter content in the 0–20 cm and 20–35 cm soil layers increased by more than 3.7% on average; Soil bulk density decreased to 1.0 g/cm³ in the 0–20 cm layer and 1.11 g/cm³ in the 20–35 cm layer; Soil aggregate structure was significantly improved, with the content of large macroaggregates increasing by more than 19% in both the 0–20 cm and 20–35 cm layers; Crop yield increased by 7.7–12.4%, and economic income rose by 1138.3 yuan per hectare.