What is slow release fertilizer?
"Release" refers to the process by which nutrients are converted into chemical forms that the plant can directly absorb and utilize (eg, dissolve, hydrolyze, degrade, etc.).
"Slow release" is a slow release.
"Controlled release" is controlled release.
The first thing to do is to clarify the three most important concepts.
The classification of the International Fertilizer Industry Association, chemical synthesis is called slow release fertilizer; another sulfur + envelope is a type, called controlled release fertilizer. There are other categories, as long as we can achieve the standard of controlled release fertilizer, we can also say that it is a slow release fertilizer.
The envelope is physically controlled, we call it chemical synthesis, it is micro-physical; there is also a kind of stable fertilizer with relatively large particles. This kind of fertilizer is also defined in the International Chemical Industry Association, which is added in urea. Some digestion inhibitors make urea conversion slower. These fertilizers are internationally called stable fertilizers, but such fertilizers are not slow-release fertilizers because they do not meet the standards.
There are many terms in this, which are called “sustained release fertilizerâ€, controlled release fertilizer, controlled nutrient release rate, initial nutrient release rate, cumulative nutrient release rate, average release rate, and nutrient release period.
What are the advantages of controlled release fertilizer compared to common fertilizers:
The first is to increase the utilization rate of chemical fertilizers and reduce the amount of chemical fertilizers. Since the slow-release fertilizer has a slow release effect, the gaseous and leaching loss of the fertilizer can be reduced, thereby improving the utilization efficiency of the fertilizer. China's first Shandong Jinzhengda Group, which converts slow-release fertilizer production technology into productivity, has shown through a large number of experimental data that slow-release fertilizer can double the fertilizer utilization rate by 35%, and the nitrogen loss rate is significantly reduced. It can save 30%-50% of nitrogen fertilizer.
The second is to reduce the number of fertilization and save labor. Due to the lack of labor in rural areas or due to lack of water and timely water supply, crop fertilization has become more and more simplified, and one-time fertilization of crops has become quite common. The disposable fertilizer currently sold on the market is basically a quick-acting high-nitrogen compound fertilizer, which has the risk of prolonged seedling period or late de-fertilization. The controlled release fertilizer can be designed to release the release mode of the fertilizer during the growing season, so that the release rule of fertilizer nutrient is consistent with the nutrient absorption of the crop, and the one-time fertilization meets the demand of the whole growing season of the crop.
When the tomatoes are raised, the fertilizer is applied once, and when it is planted in the ground, there is no need to fertilize it. It is done at the time of seedling cultivation. 70%-80% of Japan's slow-release fertilizers are used on rice, and fertilizers are used on seeds and roots at the time of seedlings, and they are no longer fertilized in the fields.
Slow-release fertilizer can also be used for no-tillage and soilless cultivation. Your seeds are good. If the standard is reached, the seeds and fertilizers will be planted and watered. This is very convenient.
Now many soilless cultivation irrigation nutrient solutions. There are also many problems, sometimes ill, sometimes the nutrient solution is not good, the seedlings are not good, and the problem is solved with controlled release fertilizer.
Third, it can reduce crop diseases and improve the quality of agricultural products. The crop disease and product quality are related to the amount of nitrogen fertilizer. The application of slow-release fertilizer can prevent the excessive absorption of nitrogen by crops, thereby inhibiting disease and improving quality.
"Release" refers to the process by which nutrients are converted into chemical forms that the plant can directly absorb and utilize (eg, dissolve, hydrolyze, degrade, etc.).
"Slow release" is a slow release.
"Controlled release" is controlled release.
The first thing to do is to clarify the three most important concepts.
The classification of the International Fertilizer Industry Association, chemical synthesis is called slow release fertilizer; another sulfur + envelope is a type, called controlled release fertilizer. There are other categories, as long as we can achieve the standard of controlled release fertilizer, we can also say that it is a slow release fertilizer.
The envelope is physically controlled, we call it chemical synthesis, it is micro-physical; there is also a kind of stable fertilizer with relatively large particles. This kind of fertilizer is also defined in the International Chemical Industry Association, which is added in urea. Some digestion inhibitors make urea conversion slower. These fertilizers are internationally called stable fertilizers, but such fertilizers are not slow-release fertilizers because they do not meet the standards.
There are many terms in this, which are called “sustained release fertilizerâ€, controlled release fertilizer, controlled nutrient release rate, initial nutrient release rate, cumulative nutrient release rate, average release rate, and nutrient release period.
What are the advantages of controlled release fertilizer compared to common fertilizers:
The first is to increase the utilization rate of chemical fertilizers and reduce the amount of chemical fertilizers. Since the slow-release fertilizer has a slow release effect, the gaseous and leaching loss of the fertilizer can be reduced, thereby improving the utilization efficiency of the fertilizer. China's first Shandong Jinzhengda Group, which converts slow-release fertilizer production technology into productivity, has shown through a large number of experimental data that slow-release fertilizer can double the fertilizer utilization rate by 35%, and the nitrogen loss rate is significantly reduced. It can save 30%-50% of nitrogen fertilizer.
The second is to reduce the number of fertilization and save labor. Due to the lack of labor in rural areas or due to lack of water and timely water supply, crop fertilization has become more and more simplified, and one-time fertilization of crops has become quite common. The disposable fertilizer currently sold on the market is basically a quick-acting high-nitrogen compound fertilizer, which has the risk of prolonged seedling period or late de-fertilization. The controlled release fertilizer can be designed to release the release mode of the fertilizer during the growing season, so that the release rule of fertilizer nutrient is consistent with the nutrient absorption of the crop, and the one-time fertilization meets the demand of the whole growing season of the crop.
When the tomatoes are raised, the fertilizer is applied once, and when it is planted in the ground, there is no need to fertilize it. It is done at the time of seedling cultivation. 70%-80% of Japan's slow-release fertilizers are used on rice, and fertilizers are used on seeds and roots at the time of seedlings, and they are no longer fertilized in the fields.
Slow-release fertilizer can also be used for no-tillage and soilless cultivation. Your seeds are good. If the standard is reached, the seeds and fertilizers will be planted and watered. This is very convenient.
Now many soilless cultivation irrigation nutrient solutions. There are also many problems, sometimes ill, sometimes the nutrient solution is not good, the seedlings are not good, and the problem is solved with controlled release fertilizer.
Third, it can reduce crop diseases and improve the quality of agricultural products. The crop disease and product quality are related to the amount of nitrogen fertilizer. The application of slow-release fertilizer can prevent the excessive absorption of nitrogen by crops, thereby inhibiting disease and improving quality.
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