What are the types of soil nutrients in pineapple?

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What are the types of soil nutrients in pineapple?

Soil nutrients can generally be divided into 5 types.

1. Water-soluble nutrients: refers to the nutrients that can be dissolved in water. They exist in the soil solution and are easily absorbed and utilized by crops and are highly effective to crops. Water-soluble nutrients include most inorganic salts and ions, such as K+, NO3-, Ca2+, etc., as well as a small number of organic compounds with simple structure and low mass relative density, such as amino acids.

2. Exchangeable nutrients: refers to the exchangeable ions that are adsorbed on the surface of soil colloidal particles. Such as NH4+, K+, Ca2+, H2PO42- etc. The ions in the soil solution and the ions on the soil colloid can be exchanged and maintain a dynamic balance. The two have no strict boundary and are effective for crops. Therefore, water-soluble nutrients and exchangeable nutrients are collectively called quick-acting nutrients.

3. Slow-acting nutrients: mainly refer to the nutrients that are easily released in certain minerals, such as potassium fixed between layers of clay minerals and potassium in some biotite. This part of the nutrients is less effective for current crops, but it can be used as a source of supply of available nutrients.

4. Insoluble nutrients: nutrients that exist in primary ore and are not easily decomposed and released, such as potassium in orthoclase. They can only be released during long-term weathering before they can be absorbed and utilized by crops. Insoluble nutrients are also called delayed-acting nutrients and are the reserves of crop nutrients.

5. Organic nutrients: refers to the nutrients present in the soil organic matter. According to the difficulty of absorption and utilization of nutrients by plants, it can be simply divided into quick-acting nutrients and late-acting nutrients. Generally speaking, quick-acting nutrients account for only a small part, less than 1% of the total amount. It should be noted that the division of quick-acting nutrients and late-acting nutrients is relative, and the two are always in a dynamic balance. The factors that affect the form of soil nutrients include: weathering conditions of soil minerals, cultivation and management of farming areas, fertilization, irrigation, and artificial guest soil.

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