Acid soil conditioner

Abstract

The invention relates to an acid soil conditioner and belongs to the technical field of agriculture. The acid soil conditioner can be used for overcoming the defects of the single application of quick lime. The acid soil conditioner provided by the invention is prepared by mixing the following materials by weight percent: 0.2-2.0% of dolomite, 0.2-2.0% of potassium feldspar, 1.0-5.0% of quick lime, 1.0-5.0% of lime nitrogen, 1.0-5.0% of limestone flour, 1.0-5.0% of slaked lime, 1.0-20.0% of calcium magnesium phosphate, 2.0-10.0% of boric sludge, 2.0-10.0% of calcarea carbonica and the balance of kieselguhr. The acid soil conditioner is scattered onto the soil surface in a soil preparation process; the dosage is 50.0-150.0kg / mu; and the soil is turned over and the acid soil conditioner is uniformly mixed with 20cm surface soil after the acid soil conditioner is applied.

Description

technical field [0001] The invention belongs to the technical field of agriculture and relates to an acidic soil conditioner. Background technique [0002] Acidic soil refers to the soil with pH<6.5. Acidic soil accounts for about 40% of the cultivated land area in the world and about 20% of the cultivated land area in my country. my country's acidic soil mainly includes brick yellow soil, red soil, dry red soil and dark brown soil, etc. The acidic sources mainly include: rainwater and CO in the air 2 Soluble in water to form carbonic acid; microbial and plant root metabolites; organic acids produced by the decomposition of organic matter in the soil when applying organic fertilizers, etc. [0003] High concentrations of H in acidic soils + 、Al 3+ , Mn 2+ and Fe 2+ etc. After soil acidification, it can affect the absorption and utilization of nutrients by plants, mainly in the following aspects: 1. In acidic soil, because aluminum ions have strong adsorption proper...

AI Technical Summary

Problems solved by technology

[0003] High concentrations of H in acidic soils + 、Al 3+ , Mn 2+ and Fe 2+ etc. After soil acidification, it can affect the absorption and utilization of nutrients by plants, mainly in the following aspects: 1. In acidic soil, because aluminum ions have strong adsorption properties, it can compete with exchangeable base ions for colloids. 2. Due to the increase of active iron and aluminum in acidic soil, phosphate is easy to combine with it and form insoluble precipitates, reducing phosphorus 3. Bacteria and actinomycetes in the soil (such as nitrogen-fixing bacteria and cellulolytic bacteria, etc.) are suitable for growth and reproduction in neutral and slightly alkaline environments, and their activity gradually decreases in acidic soils, thereby affecting organic matter. Decomposition and soil fertility, while fungi dominate in strong acidic soils, leading to serious plant diseases; 4. Acidic soil colloids have less negative charges, and the saturation of the base decreases, making the soil buffer performance weak; 5. Due to the leaching of calcium, The reduction of soil aggregate structure and aggregates leads to the deterioration of soil physical properties and the decline of water and fertilizer retention capacity; 6. Acidic soil reduces the availability of soil nutrients, and the content of Al and other heavy metals is usually high, which can also form to poison

[0004] The current method of improving acidic soil in production is to apply quicklime on the soil surface and then mix it with the plow layer soil. The main disadvantage of this method is that if the quicklime is applied unevenly, it may directly contact the plant spores, which will affect the emergence rate or fail to emerge. Direct contact with plant roots will cause burning seedlings and rotten roots; quicklime has low solubility and slow mobility on the soil profile. Large or long-term application of quicklime will cause soil compaction and soil calcium, potassium, magnesium and other elements. Imbalance leads to crop yield reduction; excessive application of quicklime will reduce the absolute content of soil moisture, resulting in plant water shortage, which is generally considered to be the phenomenon of lime "burning seedlings"; when quicklime is mixed into the soil, the pH index of the soil will increase rapidly, destroy the biological properties of the soil

[0005] The purpose of the present invention is to provide an acidic soil conditioner, which can improve the acid environment of the soil and overcome the shortcomings and deficiencies of the existing simple application of quicklime.

[0006] Retrieval shows that there is no relevant report on making acidic soil conditioner from dolomite, potassium feldspar, quicklime, lime nitrogen, limestone powder, slaked lime, calcium magnesium phosphate fertilizer, boron mud, carbonated lime and diatomaceous earth to improve acidic soil