Preparation technology of iron, manganese, copper and zinc containing high molecular slow-release fertilizer

Abstract

The invention provides a preparation technology of iron, manganese, copper and zinc containing high molecular slow-release fertilizer and belongs to the technical field of fertilizer preparation. Thepreparation technology comprises the following steps: adding 1.5g of phosphoric acid and 0.0375g of zinc powder into a small beaker and stirring and dissolving to prepare a component A; adding 50mL ofdistilled water into a 250mL beaker; adding 1.250g of ferrous sulfate, 0.525g of manganese sulfate and 0.108g of copper sulfate crystal; adjusting the pH (Potential of Hydrogen) to be 10; standing and filtering to prepare a component B; adding the component B into the component A to prepare a product C; adding urea and formaldehyde into a round bottomed flask and adjusting the pH value to be 8; reacting at T1 DEG C for 1min; then adjusting the temperature to be T2 DEG C, wherein the reaction time t is 2min; adding the product C and adjusting the temprature to T3 DEG C; continually reacting until a system becomes sticky; drying in a drying oven with the temperature of T4 DEG C until the weight is constant to prepare the iron, manganese, copper and zinc containing high molecular slow-release fertilizer. 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 process of a polymer slow-release fertilizer containing iron, manganese, copper and zinc. 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,...

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