The invention provides an
intercropping method for realizing
salinity regulation and control and
nitrogen synergy through
sophora alopecuroide-filmless cotton space configuration, and belongs to the technical field of
saline-
alkali soil ecological farming. Wide and narrow rows are arranged, planting is carried out alternately,
sophora alopecuroide is sown in the wide row to serve as a
sophora alopecuroide belt, and cotton is sown in the narrow row to serve as a cotton belt; respectively performing
drip irrigation in a
seedling stage and a squaring stage; and
cutting and returning to the field. By adjusting the
spatial configuration of the leguminous
shrub sophora alopecuroides and the film-free cotton, the mulching film
pollution is eradicated;
sophora alopecuroides root growth can improve the
soil porosity and promote salt leaching, the overground part can cover and block
evaporation salt return, and the salt surface accumulation problem of the film-free cotton field is solved;
sophora alopecuroides nitrogen fixation substitution can reduce
nitrogen fertilizer consumption.
Sophora alopecuroides
green manure returning to the field can improve soil organic matters and realize synchronous improvement of carbon and nitrogen. According to the method,
plant ecological niche regulation is taken as a core, the cost is low, four-dimensional
collaboration of salt inhibition, nitrogen increase,
pollution reduction and synergism of the
saline-
alkali soil cotton field can be realized, and a standardized solution is provided for agricultural green transformation in
arid regions.