| abstract |
The invention relates to a technical method for double-layer salt isolation in saline-alkali land. The method comprises the following steps: digging a planting hole on the saline-alkali land; laying a first salt-isolating layer of zeolite, crushed stone and activated carbon at the bottom of the planting hole; using reed straw to lay a second layer Layers of salt isolation layers are laid with a thickness of 10-20cm; a ring-shaped PVC ventilation/drip irrigation pipe is buried in the middle of the second salt isolation layer, and the pipe wall of the PVC ventilation pipe is wrapped with non-woven fabrics; the saline-alkali soil is improved, and the wet garbage is composted The product, desulfurized gypsum, fly ash, and superabsorbent resin are mixed with the original soil and placed in the planting area; plants are planted. The invention adopts double-layer salt isolation measures and is supplemented by annular PVC ventilation/drip irrigation pipes to inhibit the rise of salt in groundwater, reduce the salt near the root system of plants, and promote the leaching of salt in the salt-isolating layer. The use of wet garbage compost products, desulfurized gypsum, fly ash, superabsorbent resin and other materials can not only reuse waste, but also improve the basic physical and chemical properties of the soil, enhance nutrients, and improve the soil structure of saline-alkali soil. |