Slow-release fertilizer

Abstract

The invention relates to slow-release fertilizer. The slow-release fertilizer is prepared from the following raw materials in parts by weight: 20 to 30 parts of urea, 20 to 25 parts of superphosphate, 15 to 20 parts of potassium sulfate, 0.03 to 0.1 part of disodium octoborate tetrahydrate, 0.01 to 0.5 part of zinc sulfate, 0.01 to 0.2 part of ferric sulfate, 0.01 to 0.05 part of ammonium molybdate, 0.05 to 0.5 part of magnesium sulfate, 0.5 to 3 parts of polyaspartic acid, 2 to 5 parts of vermiculite powder, 10 to 15 parts of polyurethane resin and 30 to 55 parts of humic acid. The slow-release fertilizer provided by the invention has a good slow-release effect and high utilization rate; by one-time fertilization, the nutrient demand of the whole growing period of crops can be basically met, and the fertilization operation cost can be greatly reduced; in addition, the slow-release fertilizer has good safety to the crops; water and fertilizer also can be retained, and the soil is improved, so that the yield of the crops and the quality of agricultural products are greatly improved; the slow-release fertilizer is in line with the policy orientation of developing resource-conserving, environment-friendly as well as sustainable and high efficiency agriculture.

Description

technical field [0001] The invention relates to the technical field of fertilizers, in particular to a slow-release fertilizer. Background technique [0002] In recent decades, the world's fertilizer consumption has been increasing, consuming a large amount of non-renewable resources. However, the utilization rate of fertilizers is low, and about half of the fertilizers applied each year are lost by various means, causing huge economic losses and waste of resources. What is more serious is that the lost fertilizers have caused water pollution, agricultural product pollution and atmospheric greenhouses. effects etc. An important reason for the low utilization rate of fertilizers is that the chemical fertilizers that people often use are instant fertilizers. There are three defects in the application of quick-acting chemical fertilizers: First, the utilization rate of nutrients is not high, and most of the nutrients applied to the soil are leached. Volatilization and fixatio...

AI Technical Summary

Problems solved by technology

However, the utilization rate of fertilizers is low, and about half of the fertilizers applied each year are lost by various means, causing huge economic losses and waste of resources. What is more serious is that the lost fertilizers have caused water pollution, agricultural product pollution and atmospheric greenhouses. effects

An important reason for the low utilization rate of fertilizers is that the chemical fertilizers that people often use are instant fertilizers. There are three defects in the application of quick-acting chemical fertilizers: First, the utilization rate of nutrients is not high, and most of the nutrients applied to the soil are leached. Volatilization and fixation, one-time application of quick-acting fertilizers cannot meet the needs of the entire growth period of crops, and repeated top-dressing increases labor intensity and input costs; secondly, quick-acting fertilizers are easy to pollute the environment, such as the loss of urea can easily cause nitrogen content in soil and groundwater Higher levels will lead to soil acidification and salinization, and nutrient enrichment in rivers and lakes; in addition, the application of quick-acting chemical fertilizers will make crops grow luxuriantly in a short period of time, the leaves will be juicy, the resistance will be weakened, and pests and diseases will easily break out

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