Cyclic pressure salt treatment method for saline-alkali land

Abstract

The invention discloses a cyclic pressure salt treatment method for the saline-alkali land. The method comprises the following steps that 1, soil of the saline-alkali land sequentially comprises an unsaturated layer, a transition layer and a saturated layer from top to bottom; water storage ditches are deeply dug on the saline-alkali land, each water storage ditch reaches the saturated layer of the soil in depth, and the distance between every adjacent ditches is 100-200 meters; 2, salt-absorbing plants are planted in the water storage ditches; 3, irrigation is conducted on the saline-alkali land at least twice every month, irrigation water is sprayed to wash the soil and then gathered into the water storage ditches, and the water level in each water storage ditch is not higher than the transition layer of the soil; the irrigation water and rainwater wash the soil and then carry alkali and salt in the unsaturated layer of the soil into the water storage ditches, partial salt in the water is absorbed by the salt-absorbing plants, and partial salt penetrates into the lower-layer saturated layer of the soil, so that the salt in the saturated layer of the soil is gradually reduced to adapt to the growth needs of various agricultural plants, and the agricultural value of the saline-alkali land is increased.

Description

technical field [0001] The invention relates to the technical field of saline-alkali land treatment, in particular to a cycle salt pressure treatment method for improving the soil condition of saline-alkali land. Background technique [0002] The main reason for soil secondary salinization is that due to excessive irrigation and insufficient drainage, the dynamic balance of groundwater has been destroyed, causing the groundwater table to rise, and the salt in the soil rises to the surface of the soil under the action of capillary force along with the soil moisture. , the water evaporates, and the salt remains on the surface, resulting in salt accumulation in the soil, soil fertility decline, and soil supply capacity imbalance, thus causing plants to lose a good growth environment and nutritional conditions, affecting the normal absorption and metabolism of plants, resulting in "physiological dehydration" "And die, directly affect the yield of crop plants. [0003] The soil ...

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Problems solved by technology

[0002] The main reason for soil secondary salinization is that due to excessive irrigation and insufficient drainage, the dynamic balance of groundwater has been destroyed, causing the groundwater table to rise, and the salt in the soil rises to the surface of the soil under the action of capillary force along with the soil moisture. , the water evaporates, and the salt remains on the surface, causing salt accumulation in the soil, soil fertility decline, and soil supply capacity imbalance, thus causing plants to lose their good growth environment and nutritional conditions, affecting the normal absorption and metabolism of plants, resulting in "physiological dehydration" "And die, directly affect the yield of crop plants

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