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Farmers should pay attention to three problems when applying compound (mixed) fertilizer: First, compound (mixed) fertilizer is a good fertilizer, but the application rate should not be too large. Second, it is necessary to purchase suitable compound (mixed) fertilizers based on crop types. Some farmers, regardless of whether they grow cabbage or radish, use 12-6-7 compound (mixed) fertilizers. Because leafy vegetables are good for nitrogen, and root vegetables are like potassium, you should choose different compound fertilizers. The fertilizer is highly targeted and the effect is natural. Third, the calculation of compound (mixed) fertilizer should be based on phosphorus and potassium nutrients. The insufficient nitrogen can be adjusted by topdressing nitrogen fertilizer, so that balanced fertilization can be achieved.
From:Ningbo Agricultural Economics Network
Compound (mixed) fertilizer application technology
Composite (mixed) fertilizers are ternary compound fertilizers containing nitrogen, phosphorus and potassium. Fertilization techniques for compound (mixed) fertilizers: 1) The most correct and effective method of application is as a base fertilizer. As a base fertilizer, it can be applied in depth, which is beneficial to the absorption of nutrients by crop roots in the middle and late stages, and meets the maximum needs of phosphorus and potassium nutrients in the middle and late crops. It can also overcome the difficulties of applying phosphorus and potassium fertilizers in the middle and late stages. 2) Used as top dressing. It will lead to the waste of phosphorus and potassium resources, because the compound (mixed) fertilizer is difficult to play on the soil surface, and the utilization rate in the season is not high. If there is no compound fertilizer in the base fertilizer, it can be properly applied after emergence, but it is best to apply the ditch and cover the soil after application. 3) Used as a fertilizer. Generally, the soil available phosphorus in the vegetable greenhouse is extremely high, and it is not necessary to use the ternary compound fertilizer for the fertilization. If the vegetables are harvested many times like cucumbers, green peppers, tomatoes, etc., the compound (mixed) fertilizer can be applied to supplement the appropriate nutrients. However, for the fertilization, the compound fertilizer with high nitrogen and potassium content and full water solubility should be used. 4) Used as a seed fertilizer. In principle, it is not possible to use highly compound (mixed) fertilizers for seed fertilizers. Because high-concentration fertilizers are mixed with seeds, they are easy to burn. If it is necessary to make a fertilizer, it is necessary to separate the seed from the fertilizer.
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