Seaweed oligosaccharide synergistic urea and preparation method thereof

Abstract

The invention relates to a seaweed oligosaccharide synergistic urea and a preparation method thereof. The preparation method comprises the following steps: mixing seaweed oligosaccharide and urea or raw materials or intermediate product in the urea synthesis step, and carrying out evaporation and granulation in the urea preparation technique to prepare the seaweed oligosaccharide synergistic urea. The special carboxy group with complexation, ion exchange and slow release properties in the oligosaccharide structure can be combined with the cationic group in the urea, so that active factors (ammonium ions and ammonia) in the urea nitrogen fertilizer can be slowly released in soil, thereby achieving the goal of providing nutrients for the plant for a long time. The seaweed oligosaccharide synergistic urea can enhance the utilization ratio of the nitrogen fertilizer to 45-55%, stimulate the plant to generate induced disease resistance, and enhance the autoimmunity of the plant. Besides, the seaweed oligosaccharide synergistic urea can prevent the plant from absorbing heavy metals around the root system, improve the soil environment and enhance the safety of the plant.

Description

technical field [0001] The invention belongs to the technical field of fertilizers, in particular to a seaweed oligosaccharide synergistic urea and a preparation method thereof technical background [0002] International research on seaweed oligosaccharides began in the middle and late 1950s, and my country began to do such research in the early 1980s. The early preparation of marine oligosaccharides was mainly for structural analysis, but now it is used for the study of structure-activity relationship and the development of applications of marine oligosaccharides in medicine, functional products, cosmetics, and agricultural technology. In agriculture, oligosaccharides are not only in demand in the development of pollution-free fertilizers, crop resistance and green pesticides, but also as plant growth regulators and seed treatment agents. Agriculture is the foundation of our country. Fertilizer plays a pivotal role in stabilizing the sustainable growth of our country's agr...

AI Technical Summary

Problems solved by technology

However, there are very prominent problems in my country's chemical fertilizers at present. The amount of chemical fertilizers used has doubled compared with 20 years ago, but the grain output has dropped from 28% to less than 5%. The utilization rate of chemical fertilizers has dropped sharply, and farmers have increased production without increasing income.

In the chemical fertilizer industry, nitrogen fertilizer plays a dominant role, but the average utilization rate of nitrogen fertilizer is only 30% to 35%. About 65-70% of nitrogen exists in the soil and is not used by plants. With the change of rain and snow weather, it is washed to In oceans, lakes and rivers, it not only increases the production cost and causes huge waste, but also pollutes the living environment. Compared with the nitrogen fertilizer utilization rate of about 50% in advanced countries in the world, there is a big difference

At present, the synergistic nitrogen fertilizer circulating in the domestic market is mainly polypeptide urea. Polypeptide urea is added polyaspartic acid in the process of urea synthesis. Polyaspartic acid is a single-component amino acid synthesized by American technology. synergist, no fertilizer effect