Control system and method for salt and alkali accumulation land of greenhouse

Abstract

The invention discloses a control system and method for salt and alkali accumulation land of a greenhouse. The control system comprises a crop planting layer, a salt and alkali inhibiting layer, a subsoil layer, water permeating pipelines and a salt discharging ditch, wherein the salt and alkali inhibiting layer covers the subsoil layer, the crop planting layer covers the salt and alkali inhibiting layer, the water permeating pipelines are laid in the subsoil layer in the east-west direction of the greenhouse, and the salt discharging ditch is dug between greenhouses; the method comprises the steps of stratigraphic division, digging of the salt discharging ditch, laying of the water permeating pipelines, filling of the salt and alkali inhibiting layer, turning of soil and the like. According to the control system and method for the salt and alkali accumulation land of the greenhouse, underground saline-alkaline water permeates into the water permeating pipelines and is discharged through the salt discharging ditch, the situation that underground water rises along soil capillaries and is vaporized so that accumulation of salt is caused is prevented, the phenomenon that the saline-alkaline water goes on rising along the soil capillaries is reduced, the crop planting layer is further subjected to broadcast application of calcium phosphate and turning of the soil by using a rotary tillage plough and salt is discharged rapidly according to the design of the whole system; once for all, the control effect on soil salinization is good, and the using time is long.

Description

technical field [0001] The invention relates to the field of soil cultivation, in particular to a control system and method for returning to saline-alkali land in a greenhouse. Background technique [0002] Saline-alkali soil is a type of soil where crops are difficult to grow when the concentration of soluble salts or substitutable sodium ions in the soil reaches a certain level. Water and salt movement is an important factor in the formation of saline-alkali soil, that is, salt comes with water and goes away with water. That is to say, because the soil parent material and groundwater in saline-alkaline areas often contain a certain amount of salt, when the groundwater level is close to the surface and the surface area is relatively dry, the groundwater that rises to the surface under the capillary action of the soil evaporates and remains The salt dissolved in the groundwater accumulates over time, which gradually increases the salt content of the soil, thus forming saline...

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Problems solved by technology

[0006] The purpose of the present invention is to provide a control system and method for returning to saline-alkali land in greenhouses, which has the advantages of obvious effect of controlling soil salinization and long-term use, so as to solve the problems of slow charging speed, small capacity and endurance of the mobile power source proposed in the above-mentioned background technology Insufficient, large and bulky capacity and slow charging time

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