Method for improving acid soil
An acid soil and soil technology, applied in the fields of land preparation methods, soil conditioning materials, chemical instruments and methods, etc., can solve problems such as environmental damage, spread of diseases and insect pests, waste of resources, etc., and achieve the effect of lasting fertilizer efficiency, promoting crop growth, and improving fertility.
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Embodiment 1
[0038] Such as figure 1 As shown, the method for improving acidic soil in the present embodiment may further comprise the steps:
[0039] Step 1: Using agricultural and forestry residues to prepare biochar and fine-grained mushroom dregs.
[0040] Wherein, the utilization of agricultural and forestry residues to prepare biochar is realized by the following methods:
[0041] Collect agricultural and forestry residues from different sources, cut the agricultural and forestry residues into 0.5-3cm segments, wash them with water and hydrochloric acid, and dry them at a constant temperature of 80°C;
[0042] Put the above-mentioned agricultural and forestry residues into the filling box of the carbonization furnace, seal anaerobic and pass nitrogen gas for 30 minutes to achieve anaerobic, and heat to 300°C-700°C at a heating rate of 5°C-10°C / min Under certain conditions, keep a constant temperature and pyrolyze for 5 to 6 hours;
[0043] Cool the carbonized product to room tempe...
Embodiment 2
[0051] The method for improving acidic soil in this embodiment is to add the biochar obtained in step 1 to acidic soil after further processing on the basis of embodiment 1.
[0052] The biochar obtained in step 1 also includes the step of carrying out activation treatment:
[0053] Mix the obtained biochar with an activator, raise the temperature to the activation temperature in an inert atmosphere for activation treatment, then cool it to room temperature, wash the product with dilute hydrochloric acid, wash it with water until it is neutral, and then dry it to obtain the biochar used in soil. Biochar;
[0054] Wherein, the activator is at least one of potassium carbonate, potassium dihydrogen phosphate, dipotassium hydrogen phosphate, potassium acetate, diammonium hydrogen phosphate, ammonium dihydrogen phosphate, and ammonium acetate.
Embodiment 3
[0056] The method for improving acidic soil in this embodiment is to further process the biochar obtained in step 1 on the basis of embodiment 1 or embodiment 2 and then add it to the acidic soil.
[0057] The biochar obtained in step 1 also includes the step of adsorbing sodium metasilicate on the surface of the obtained biochar before being added to the soil:
[0058] Add the obtained biochar into water and mix well, then add powdered sodium metasilicate and stir again, dry the mixed mixture until the water content is 20%, and finally obtain the biochar used in the soil.
[0059] Microbial bacteria are also added in the soil mixture in step 2 described in the above embodiments, and the mass percentage of the microbial bacteria is 0.01~0.05, and the microbial bacteria are the mixture of photosynthetic bacteria, Trichoderma korningii, and Bacillus subtilis. The mass ratio of photosynthetic bacteria, Trichoderma korningii and Bacillus subtilis is 1:1:2.
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