2results about How to "Inhibit salt return" patented technology

The application relates to the technical field of water and fertilizer irrigation, in particular to a water and fertilizer integrated irrigation device and a laying device thereof. The water and fertilizer integrated irrigation device comprises a water and fertilizer integrated machine, a drip irrigation main pipe, a drip irrigation branch pipe and a water guide fixing assembly. The water guide fixing assembly comprises upper and lower fixed elastic sheets, and a rigid water guide pipe. The inner sides of the upper and lower fixed elastic sheets are provided with fixed sucking discs. The rigid water guide pipe is arranged at the middle part of the lower fixed elastic sheet through a conical telescopic piece. The water outlet of the drip irrigation branch pipe is arranged opposite to the conical telescopic piece, so that the water of the water outlet enters the rigid water guide pipe through the conical telescopic piece. The laying device of the drip irrigation branch pipe is disclosed. The water and fertilizer integrated irrigation device and the laying device thereof have the double advantages of easy maintenance of the surface branch pipe and low evaporation of underground water transportation, are not prone to blockage, are convenient to maintain, the laying device can realize large-scale overall laying, and is suitable for large-scale and continuous operation of fields and greenhouses.

This invention belongs to the technical field of phosphogypsum solid waste utilization and saline-alkali land improvement, specifically disclosing a phosphogypsum-based water-locking and temperature-regulating amendment for saline-alkali land. The phosphogypsum-based water-locking and temperature-regulating amendment provided by this invention comprises phosphogypsum dihydrate, potassium magnesium sulfate composite salt, modified paraffin wax, bentonite, modified humic acid, sodium alginate, modified water-retaining agent, composite bacterial agent, and water. This amendment has a core-shell-bridge three-layer composite structure, achieving a synergistic effect of targeted alkali regulation, long-term water retention, temperature-sensitive adaptation, and biological synergistic effect, solving core technical problems such as poor compatibility, easy salinization, and weak adaptability in saline-alkali land improvement. This invention also provides methods for preparing and applying this amendment.