Preparation and testing technologies of boron-containing high molecular slow-release fertilizer

Abstract

The invention provides preparation and testing technologies of boron-containing high molecular slow-release fertilizer and belongs to the technical field of fertilizer preparation. The preparation technology comprises the following steps: (1) adding 2.06g of boric aid and 1.87g of potassium hydroxide into a round bottomed flask; reacting at 90 DEG C for 3h to obtain a product A; cooling a system for later use; (2) adding a certain ratio of urea and formaldehyde into a three-necked flask and adjusting the pH (Potential of Hydrogen) of the system to be 8 through a 5 percent KOH water solution; stirring at the temperature T1 and reacting for 80min (through carrying out addition reaction); adjusting the temperature of a water-bath pot to be 60 DEG C and continually reacting for 40min (throughcarrying out condensation polymerization reaction); adding a product into the system of step (1) and adjusting the temperature to be T3 (gelation temperature); reacting under stirring until the systembecomes sticky, and stopping reaction; after granulating, drying at the temperature T4. The slow-release fertilizer prepared by the preparation method is more reliable.

Description

technical field [0001] The invention relates to the technical field of fertilizer preparation, in particular to a preparation and testing process of a boron-containing polymer slow-release fertilizer. Background technique [0002] Looking at the development of fertilizers at home and abroad, it can be seen that slow-release fertilizers are ideal fertilizers for developing sustainable ecological agriculture, improving fertilizer utilization rates and causing less environmental pollution. At present, the domestic research on slow-release fertilizers has made some progress, but there are still some problems, mainly as follows: (1) The price of slow-release fertilizers is generally high, which limits their popularization and application. Currently, they are mainly used for flowers, Markets such as lawns and golf courses; (2) Most of the slow-release fertilizers currently used in the market are coated slow-release fertilizers. This fertilizer is not only expensive, but most of th...

AI Technical Summary

Problems solved by technology

At present, the domestic research on slow-release fertilizers has made some progress, but there are still some problems, mainly as follows: (1) The price of slow-release fertilizers is generally high, which limits their popularization and application. Currently, they are mainly used for flowers, Markets such as lawns and golf courses; (2) Most of the slow-release fertilizers currently used in the market are coated slow-release fertilizers. This fertilizer is not only expensive, but most of the coating materials are difficult to degrade, and remain in the soil after the fertilizer nutrients are completely released. (3) There are 17 types of nutrients necessary for plant growth, including macronutrients and micronutrients, but the nutrients contained in slow-release fertilizers are single, and most reports are Nitrogen-containing slow-release fertilizers cannot meet the needs of crops for phosphorus, potassium and trace elements other than nitrogen

[0003] Although micro-fertilizers have developed rapidly in recent years, there are also some problems in the application: (1) trace elements exist in the form of metal ions in trace element compound fertilizers, which are easily solidified by the soil, making the fertilizer effect of trace elements ineffective. (2) Water-soluble metal chelates can be used as micro-fertilizers to obtain obvious yield-increasing effects, but the high cost limits their application

Images