Long-acting slow-release nitrogen fertilizer and preparation method thereof

Abstract

The invention relates to long-acting slow-release nitrogen fertilizer which comprises the following components by mass part: 252 parts of active ingredients of nitrogen, 307-336 parts of bentonite and 7-9 parts of long-acting compound fertilizer additive. The bentonite comprises 85-90% of montmorillonite, and the long-acting compound fertilizer additive comprises the following components by mass part: 2-8 parts of hydroquinone, 3-25 parts of dicyandiamide, 0.1-0.8 part of complex rare earth and 70-95 parts of zeolite powder. The invention further relates to a preparation method of the long-acting slow-release nitrogen fertilizer, comprising the following steps: mixing the components of the long-acting compound fertilizer additive according to the proportion, crushing, granulating, drying, cooling, screening and enveloping to obtain the long-acting slow-release nitrogen fertilizer. The long-acting slow-release nitrogen fertilizer has long effective period. Due to the application of the long-acting slow-release nitrogen fertilizer, the yield of crops can be improved by 10-20%, the quality of crops can be improved significantly, the nutrient utilization rate of the crops can be increased, the production cost can be lowered, and the content of nitrate in vegetable crops can be reduced.

Description

technical field [0001] The invention relates to a long-acting slow-release nitrogen fertilizer. Background technique [0002] At present, the average utilization rate of nitrogen fertilizer is low, the loss of nutrients is serious, and it is easy to cause pollution to groundwater and rivers and lakes; conventional nitrogen fertilizer is generally not easy to control the release rate of nitrogen, so that the release rate can be synchronized with the progress of nitrogen absorption by crops, so if a large amount of nitrogen fertilizer is applied at one time Nitrogen fertilizer is easy to cause burnt seedlings at the seedling stage, and often due to the limitation of manpower and cultivation conditions, it is difficult to do multiple topdressing, resulting in poor growth of crops due to lack of fertilizer. At present, the utilization rate of nitrogen fertilizer is low, not only because the rate of nitrogen fertilizer used in general chemical fertilizers is not easy to control, ...

AI Technical Summary

Problems solved by technology

[0002] At present, the average utilization rate of nitrogen fertilizer is low, the loss of nutrients is serious, and it is easy to cause pollution to groundwater and rivers and lakes; conventional nitrogen fertilizer is generally not easy to control the release rate of nitrogen, so that the release rate can be synchronized with the progress of nitrogen absorption by crops, so if a large amount of nitrogen fertilizer is applied at one time Nitrogen fertilizer is easy to cause burnt seedlings at the seedling stage, and it is often difficult to topdress the fertilizer multiple times due to the limitation of manpower and cultivation conditions, resulting in poor growth of crops due to lack of fertilizer

At present, the utilization rate of nitrogen fertilizer is low, not only because the rate of nitrogen fertilizer used in general chemical fertilizers is not easy to control, but also because the soil quality in different regions is different, so the utilization rate of nitrogen fertilizer is not the same