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Applying biochar to saline soil is a novel strategy for improving soil quality. However, how biochar addition amount affects soil nutrients, bacterial communities, and cotton growth at different stages remains unclear. Three biochar treatments, no biochar (BC0), 1% biochar (BC1, w/w), 3% biochar (BC3), and two cotton varieties, salt‐sensitive (SS) and salt‐tolerant (ST), were used in pot experiments,...
To explore the improvement effect of subsurface drainage and brackish water on saline alkali soil, an orthogonal experimental design was used to conduct soil column experiments under nine parameter combinations of the depth of the buried subsurface pipe, irrigation amount and salinity of brackish water. A numerical model of soil water and salt movement was established, and the physical parameters...