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The compound fertilizer has long effect and is easy to be used as a base fertilizer. It is not suitable for use in the seedling stage fertilizer and the middle and late stage fertilizers, and avoids greed.
Compound fertilizer decomposition is slow, pay attention to use with elemental nitrogen fertilizer. Crops require less nitrogen fertilizer during seedling stage. Therefore, crops with compound fertilizer as base fertilizer should be supplemented with quick-acting nitrogen fertilizer in time for topdressing according to the fertilizer requirements of different crops to meet crop nutrient requirements. The concentration of compound fertilizer is quite different. It should be noted that the appropriate concentration should be selected. It is necessary to use economical and efficient compound fertilizer due to different regions, soils and crops. Generally, high-concentration compound fertilizer is used in economic crops.
The concentration of compound fertilizer is high, avoiding direct contact of seeds with fertilizer or mixing of fertilizers. The compound fertilizer has a high nutrient content. If it is in direct contact with the seed or seedling roots, it will affect the emergence of seedlings and even the burning of seedlings and rotten roots. When planting, the seeds should be separated from the point application and the compound fertilizer by 5-10 cm. It should not be directly applied to the same point with the seeds, causing fat damage.
The compound fertilizer is different from the raw materials, and attention should be paid to the use of nutrients. Nitrate-containing compound fertilizer should not be used in leafy vegetables and paddy fields; compound fertilizer containing ammonium ions should not be applied on saline-alkali soil; compound fertilizer containing potassium chloride or chloride ion should not be used on chlorine-free crops or saline-alkali soil; Compound fertilizer containing potassium sulfate is not suitable for application in paddy fields and acidic soils. Otherwise, it will reduce the fertilizer efficiency.
Author: core
Source: Rural Volkswagen
Compound fertilizer application precautions
After the spring, I went to a fertilizing season. Farmers' friends should pay attention to the following points when choosing and using compound fertilizer:
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