Slow-release fertilizer is a special fertilizer, which is characterized by the slow release of nutrients, thereby prolonging the effective period of fertilizer, and achieving the purpose of increasing crop yield and improving quality. Compared to conventional fertilizers, slow-release fertilizers have higher nutrient utilization efficiency and less risk of environmental pollution.
First, the types of slow-release fertilizer
1.Coated slow-release fertilizer: This type of slow-release fertilizer is to wrap a film on the surface of the fertilizer, and control the release rate of nutrients by controlling the thickness of the membrane and the air permeability of the membrane material. Commonly used coating materials include polyethylene, polypropylene, polyvinyl chloride, etc.
2.Blended slow-release fertilizer: This type of slow-release fertilizer is mixed with fast-acting fertilizer and some inert substances, and the release rate of nutrients is controlled through the adsorption and release of inert substances. Commonly used inert substances include clay, Portland cement, etc.
3.Chemically synthesized slow-release fertilizer: This type of slow-release fertilizer is a chemical reaction that synthesizes fertilizer to give it the property of releasing nutrients slowly. Commonly used chemically synthesized slow-release fertilizers include urea, formaldehyde, urea phosphate, etc.
Second, the characteristics of slow-release fertilizer
1.Slow nutrient release: Slow-release fertilizers release nutrients more slowly than conventional fertilizers, allowing them to better meet the needs of crop growth while reducing environmental pollution due to nutrient loss.
2.Long fertilizer shelf life: Due to the slow release of nutrients, slow-release fertilizers have a longer shelf life and can continue to provide nutrients to crops and improve crop yield and quality.
3.Improve nutrient use efficiency: Because slow-release fertilizer can release nutrients slowly, it can be better absorbed and utilized by crops, improving nutrient utilization efficiency.
4.Reduced environmental pollution: Due to the slow release rate of nutrients from slow-release fertilizers, it can reduce environmental pollution caused by nutrient loss and improve the safety of fertilizers.
Third, the application of slow-release fertilizer
Slow-release fertilizers are widely used in agricultural production and are suitable for a variety of crops and growth stages. When applying slow-release fertilizers, the following points need to be noted:
1.Choose the right type and amount of slow-release fertilizer: According to different crops and growth stages, choose the appropriate type and amount of slow-release fertilizer to achieve the best fertilization effect.
2.Reasonable fertilization time: Fertilization during the critical period of crop growth can better promote the growth and development of crops.
3.Pay attention to the fertilization method: The fertilization method of slow-release fertilizer is different from that of conventional fertilizer, and it is necessary to pay attention to details such as fertilization depth and fertilization location.
4.Regularly check the fertilization effect: After fertilization, it is necessary to regularly check the fertilization effect and adjust the fertilization plan in time to achieve the best fertilization effect.
In short, slow-release fertilizer is a special fertilizer, which has the advantages of slow release of nutrients, improved nutrient utilization efficiency, and reduced environmental pollution. When applying slow-release fertilizer in agricultural production, it is necessary to pay attention to the selection of appropriate types and dosages, reasonable arrangement of fertilization time, attention to fertilization methods, and regular inspection of fertilization effects. Through the scientific and rational use of slow-release fertilizer, the yield and quality of crops can be improved, and the sustainable development of agricultural production can be promoted.