Soil improvement method
A soil improvement and land technology, applied in the direction of soil preparation methods, applications, agricultural machinery and tools, etc., can solve the problems of long cycle and few treatment methods, and achieve the effect of short improvement cycle, improvement of bad conditions, and improvement of soil pollution status
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Embodiment 1
[0049] In a protected area, pesticides and chemical fertilizers are applied during the planting process for more than 5 years. The physical and chemical properties of the soil are: the organic matter content is 2-4%, the heavy metal exceeds the secondary standard in the soil environmental quality standard GB15618 by 2-5 times, and the cadmium and mercury exceed 1mg / kg; pesticide residues of BCH and DDT are 5-10 times higher than the secondary standard in the soil environmental quality standard GB15618, reaching more than 2.5mg / kg.
[0050] To improve it, the steps are as follows:
[0051] (1) Deep plow the free land with a depth of 60cm;
[0052] (2) During the deep plowing process, uniformly apply inorganic adsorbents, chelating agents and biosorbents, among which, 0.2t of inorganic adsorbents are applied per mu, 0.12t of chelating agents are applied per mu, and 0.0065t of biosorbents are applied per mu;
[0053] (3) Level the land and perform a deep irrigation;
[0054] (4...
Embodiment 2
[0058] In a protected area, pesticides and chemical fertilizers are applied during the planting process for more than 5 years. The physical and chemical properties of the soil are: the organic matter content is 2-4%, the heavy metal exceeds 2-4 times the secondary standard in the soil environmental quality standard GB15618, and the cadmium and mercury exceed 0.8mg / kg; Pesticide residues of BCH and DDT are 3-6 times higher than the secondary standard in the soil environmental quality standard GB15618, reaching more than 1.5mg / kg.
[0059] To improve it, the steps are as follows:
[0060] (1) Deep plow the free land with a depth of 60cm;
[0061] (2) During the deep plowing process, uniformly apply inorganic adsorbent, chelating agent and biosorbent, among which, 0.18t of inorganic adsorbent is applied per mu, 0.11t of chelating agent is applied per mu, and 0.0055t of biosorbent is applied per mu;
[0062] (3) Level the land and perform a deep irrigation;
[0063] (4) Leave th...
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