A method for measuring the longitudinal migration and ammonification dynamics of urea in soil

Abstract

The invention discloses a measurement method for vertical migration and an ammonium dynamic state of urea in soil. The method comprises the steps that firstly, simulation soil columns are manufacturedaccording to specific research needs, then the urea is applied to the experiment soil column, the soil column without urea application is used as a contrast soil column, in the experiment process, the experiment soil column and the contrast soil column are taken on time for index measurement, and the vertical migration rate MR and ammonium rate AP of the urea in the soil are calculated. Accordingto the method, operation is conducted easily and conveniently, the result is reliable, the vertical migration rule and the ammonium dynamic state in the soil after the urea is applied under differentmoisture operations can be precisely researched, water and fertilizer can be comprehensively managed through a targeted mode, the vertical movement distance and conversion of the urea are regulated and controlled, so that the urea stops the dense layer of the root system of a crop to the greatest extent, high coupling of nitrogen nutrient supply and crop demands in time and space is achieved, thecrop yield is continuously increased, the planting benefit is continuously improved, the application amount of chemical nitrogen fertilizer such as urea is greatly controlled and reduced, and agricultural sustainable development is promoted.

Description

technical field [0001] The invention relates to the technical field of farming and cultivation, in particular to a method for measuring the longitudinal migration and ammonification dynamics of urea in soil. Background technique [0002] Nitrogen nutrient has an important impact on the growth and development, yield and quality of agricultural products of crops. It is one of the three major nutrients that crops absorb the most from the soil, and the higher the crop yield, the more nitrogen nutrient is absorbed from the soil. The higher the number. The application of chemical nitrogen fertilizer has always been an important nutrient management measure in farmland, and it is also one of the most effective ways to increase crop yield. [0003] my country feeds 22% of the world's population with 7% of the world's arable land, and with the reduction of total arable land, population growth and continuous improvement of living standards, the demand for arable land output will conti...

AI Technical Summary

Problems solved by technology

The ammonization process of urea is significantly affected by temperature. In addition, even at the same temperature, when there are significant differences in the characteristics, moisture content, aeration and other factors of farmland soil, the dynamic process of ammonization of urea will still have significant differences.

Existing fertilization technology pays less attention to the vertical movement and ammonization dynamics of urea after it is applied to the farmland, and generally underestimates the impact of farmland water management on the use efficiency of urea nitrogen fertilizer

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