Soil conditioning agent and preparation method thereof

Abstract

The invention discloses a soil conditioning agent and a preparation method thereof. The soil conditioning agent comprises the following main components in percentage by weight: 90 to 96% of polyacrylamide (PAM), 1 to 3% of water soluble organic carbon (SOC), 2 to 4% of polyaspartic acid, and 1 to 3% of polyglutamic acid; the polyacrylamide (PAM) is water-in-water type anionic polyacrylamide emulsion, the molecular weight of PAM is 10,000,000 to 20,000,000, the solid content is 35 to 45%; and the water soluble organic carbon (SOC) is prepared from residues of plants. The provided soil conditioning agent can improve the physical and chemical structure of soil, increase the content of aggregates and organic matters in the soil, and enhance the water and fertilizer retaining performance of soil. Moreover, the preparation technology is simple, the production cost is low, the dissolution speed is quick, and the soil conditioning agent can be evenly applied.

Description

technical field [0001] The invention relates to the technical field of soil conditioning, in particular to a soil conditioner containing high-molecular organic matter and a preparation method thereof. Background technique [0002] As we all know, soil is the basis for human survival and the most important resource for the development of economy and agriculture; the farmland ecosystem is the most important basis for dissolving urban and rural domestic waste and maintaining the cycle of carbon, nitrogen, sulfur, and phosphorus. However, the shortage of cultivated land resources in my country is an indisputable fact. The per capita cultivated land area is small and the population is large. Many soils that are not suitable for agricultural use have been reclaimed as farmland. The grade is low, the situation of shoddy good is very serious, and the overall quality of cultivated land has declined, which has seriously affected the production capacity of my country's cultivated land a...

AI Technical Summary

Problems solved by technology

The dosage forms of soil conditioners generally include powder, granules and water. At present, most of them are powders. However, powders have the following problems: First, artificial spreading is easy to fly and drift, and it is extremely difficult to ensure the application rate and uniformity. block or partial calcification, which is unfavorable to the growth of crop roots and soil microorganisms, and has high labor intensity, low efficiency, and poor environment; the second is that the powder cannot be mechanized, which increases labor costs

In patent CN201410019940.5, polyacrylamide (PAM), water-retaining agent (SAP) or both are used together to obtain a powder soil conditioning product; when using it, it is necessary to mix dry powder polyacrylamide (PAM) with soil at a weight ratio of 1:20 Spreading on the ground after mixing evenly, not only the operation is time-consuming and laborious, but also it is difficult to ensure the uniformity of application, the on-site operating environment is poor, and there is a lot of dust

In patent CN200910079403.9, polyacrylamide (PAM) and crop straw hydrolyzate are mixed in a certain proportion to obtain powder soil conditioning products; when used, it can be applied directly or as a solution, but when choosing a solution for application, Polyacrylamide (PAM) needs to be dissolved in water one day in advance to ensure that it is completely dissolved. It cannot be prepared and used immediately, and the preparation work is time-consuming and cumbersome.

In patent CN201410150439.2, polyacrylamide (PAM) is mixed with other substances, then drum granulated and sieved, and finally a granular soil conditioner with a particle size of 2.00mm-3.00mm is produced. The production process is complicated and increases the The granulation process also increases the production cost