Acidic soil conditioner with straw as raw material, preparation method and application thereof
A soil conditioner and acidic soil technology, which is applied in the field of acidic soil conditioner and its preparation, can solve the problems that soil conditioner is difficult to be widely used, and achieve the effects of promoting the formation of soil aggregate structure, enhancing adsorption activity, and increasing alkali replacement capacity
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[0037] Example 1 Acidic soil conditioner using straw as raw material
[0038] (1) Crush the straw raw materials to 16 meshes to obtain straw powder;
[0039] (2) Mix straw powder and attapulgite in a weight ratio of 50:20;
[0040] (3) Add the above mixture to a lye containing 1.5% sodium hydroxide and 0.5% quicklime, with a solid-to-liquid ratio of 10:100, heat it to boiling, and keep it for 30 minutes;
[0041] (4) Solid-liquid separation, drying the solid part to a water content ≤ 30%;
[0042] (5) Add an appropriate amount of hydrochloric acid to the above liquid part to adjust the pH to neutral, and precipitate lignin, and dry the solid part to a water content ≤ 30% after solid-liquid separation;
[0043] (6) The two solid products after drying, calcium magnesium phosphate fertilizer and ironmaking slag are evenly mixed in a ratio of 70:10:20 to obtain a soil conditioner.
Example Embodiment
[0044] Example 2 Acidic soil conditioner using straw as raw material
[0045] (1) Crush the straw raw materials to 16 meshes to obtain straw powder;
[0046] (2) Mix straw powder and attapulgite in a weight ratio of 60:20;
[0047] (3) Add the above mixture to a lye containing 1.5% sodium hydroxide and 0.5% quicklime, with a solid-to-liquid ratio of 10:100, heat it to boiling, and keep it for 30 minutes;
[0048] (4) Solid-liquid separation, drying the solid part to a water content ≤ 30%;
[0049] (5) Add an appropriate amount of hydrochloric acid to the above liquid part to adjust the pH to neutral, and precipitate lignin, and dry the solid part to a water content ≤ 30% after solid-liquid separation;
[0050] (6) The two solid products after drying, calcium magnesium phosphate fertilizer and ironmaking slag are evenly mixed in a ratio of 80:10:10 to obtain a soil conditioner.
Example Embodiment
[0051] Example 3 Acidic soil conditioner using straw as raw material
[0052] (1) Crush the straw raw materials to 16 meshes to obtain straw powder;
[0053] (2) Mix straw powder and attapulgite in a weight ratio of 40:20;
[0054] (3) Add the above mixture to a lye containing 1.5% sodium hydroxide and 0.5% quicklime, with a solid-to-liquid ratio of 10:100, and heat to boiling for 35 minutes;
[0055] (4) Solid-liquid separation, drying the solid part to a water content ≤ 30%;
[0056] (5) Add an appropriate amount of hydrochloric acid to the above liquid part to adjust the pH to neutral, and precipitate lignin, and dry the solid part to a water content ≤ 30% after solid-liquid separation;
[0057] (6) The two solid products after drying, calcium magnesium phosphate fertilizer and ironmaking slag are mixed uniformly in a ratio of 60:15:25 to obtain a soil conditioner.
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