Compound fertilizer is made by chemical synthesis method, which has the advantages of complete nutrients and stable physical and chemical properties. Blended fertilizers are made by directly mixing several elemental fertilizers (such as urea, etc.) in different proportions, which can be produced by factories or used by farmers in the field. Both types of fertilizers can be purchased and applied as long as the quality is up to standard, and there is no absolute distinction between good and bad. But in terms of cost performance, blended fertilizers are better.

Slow and controlled release fertilizers are more suitable for high temperature and rainy areas, crops with large labor input, and cash crops where fertilizers are easily lost and inconvenient fertilization in mountainous slopes.

Greenhouses and other protected areas use a lot of fertilizers. Unused fertilizer salts will destroy the soil structure, and even cause soil acidification, reducing microbial activity. The nitrogen concentration in slow-release fertilizers is low and safe, and the nutrient utilization rate is high. Strong activity.

Slow and controlled-release fertilizers can also be used for no-tillage and soilless cultivation. Seeds and fertilizers are sown together, and irrigation is enough, which is very convenient. The nutrient solution for soilless culture is not well prepared and the seedlings grow poorly. Slow and controlled release fertilizer can solve this problem well.

Controlled and slow-release fertilizer is not suitable for application in dry land. In the absence of water, the nutrients in the fertilizer cannot be effectively released, which may cause crops to be affected by insufficient nutrients and reduce yield.

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