Humic Acid Manufacturer: Common Fertilizer Application Methods

Humic Acid Manufacturer: Common Fertilizer Application Methods

The fertilizers we use for gardening are generally divided into organic and chemical types. While organic fertilizers offer a wide range of benefits, chemical fertilizers—thanks to their simplicity, cleanliness, and rapid effectiveness—are often widely employed in large-scale gardens. Yet many gardeners, faced with an abundance of fertilizer options, find it difficult to choose the right one. Today… Humic acid manufacturer Nongda Fertilizer Industry is here to introduce itself.

1. Compound fertilizer

Compound fertilizers are typically ternary fertilizers; the term “ternary” refers to the three essential plant nutrients—nitrogen, phosphorus, and potassium—distinguished by their varying proportions.

Based on the varying ratios of the three primary nutrients, fertilizers can be classified as high-nitrogen, high-phosphorus, high-potassium, or balanced.

High-nitrogen compound fertilizer

High-nitrogen compound fertilizers primarily increase chlorophyll content and promote the growth of leaves and shoots; they are especially suitable for foliage plants and seedlings.

High-phosphorus compound fertilizer

High-phosphorus compound fertilizers can strengthen the stems and branches of flowers and ornamental plants, promote flower bud differentiation, produce larger, more vividly colored blooms, and accelerate fruit ripening. They also encourage the development of new roots and enhance cold and drought resistance. These fertilizers are primarily applied to flowering plants during their blooming period.

High-potassium compound fertilizer

High-potassium compound fertilizer: It promotes robust root development, enhances bulb enlargement in bulbous plants, and increases fruit size. It also improves the disease and pest resistance, drought tolerance, cold hardiness, and lodging resistance of ornamental flowers. This type of compound fertilizer is primarily applied during the rooting and fruiting stages.

Balanced compound fertilizer

A balanced compound fertilizer with nitrogen, phosphorus, and potassium in roughly equal proportions. It’s a “no‑fuss” fertilizer that can be applied most of the time.

Potassium dihydrogen phosphate

Potassium dihydrogen phosphate is a chemical compound with the formula KH₂PO₄ and serves as an excellent high-phosphorus, high-potassium fertilizer. It enhances plants’ tolerance to various adverse conditions, improves their drought and cold resistance, and boosts the intensity of photosynthesis. Additionally, increased potassium levels promote nitrogen uptake, stimulate protease activity, and facilitate flowering and fruiting, among other benefits.

It is not only used in floriculture; in industry, it serves as a buffering agent, a culture medium, and a flavoring agent, while in the brewing industry it functions as a nutrient, an enhancer, a leavening agent, and a fermentation aid. In agriculture, it is employed as a highly efficient compound fertilizer containing phosphorus and potassium.

Precautions

Although potassium dihydrogen phosphate is hailed as a “miracle fertilizer for flowering,” it isn’t effective in every situation. For plants to bloom beautifully, the key lies in their overall vigor. Potassium dihydrogen phosphate can only serve as an added boost; if the plants themselves are already weak, no amount of spraying will make much difference. On the other hand, when plants are robust, with healthy foliage and well‑developed roots, they can still produce stunning blooms even without this fertilizer.

Superphosphate

Superphosphate is a high‑potassium fertilizer that supplies plants with phosphorus, calcium, sulfur, and other essential nutrients, while also helping to ameliorate alkaline soils. It can be applied as a base fertilizer, used for foliar feeding, or sprayed directly onto leaves. It promotes germination, root development, branching, fruit set, and maturation, and it has nitrogen‑fixing properties that help reduce nitrogen losses. When used, it may be applied as a base fertilizer, as a foliar feed, or diluted into a solution for foliar spraying.

Urea

Urea is an inexpensive, high‑concentration nitrogen fertilizer that is neutral and fast‑acting; it can also be used to produce a variety of compound fertilizers. It promotes chlorophyll synthesis, enhances photosynthesis, and encourages lush, deep‑green foliage with tender, succulent stems and leaves, making it particularly well suited for leafy vegetables and foliage‑ornamental plants grown in greenhouses. Urea is typically applied to field‑grown flowers over large areas; it is not recommended for potted plants, as it can easily cause root burn.

Ferrous sulfate

Ferrous sulfate serves two primary purposes in horticulture: first, it supplies iron to plants; second, it helps mitigate soil alkalization.

Iron supplementation

Iron deficiency in plants causes interveinal chlorosis, with the leaf veins often remaining green and the entire blade developing a distinct reticulate pattern. In severe cases, the whole leaf—especially young leaves—turns pale yellow or whitish. Species such as camphor trees and gardenias are particularly prone to this symptom. Ferrous sulfate can be used to supply iron to the plant.

Adjust soil pH

Each type of flower has its own preferred growing conditions, and due to differences in their native habitats, they also vary in their requirements for soil pH. Most southern‑origin plants—such as azaleas, cyclamen, gardenias, champak, camellias, kalanchoes, begonias, amaryllis, primroses, chrysanthemums, clivia, jasmine, gardenia, five‑needle pine, lilies, gladioli, palm trees, plumeria, gloxinia, and others—thrive best in slightly acidic or acidic soils. In northern regions, the soil and water tend to be alkaline; even if some gardeners use acid‑rich potting mixes, prolonged irrigation with the hard local water will gradually cause the soil to become more alkaline. Once the soil turns alkaline, it becomes unfavorable for the root systems of these plants, leading to yellowing leaves, leaf drop, and a failure to bloom.

Dilute acidic ferrous sulfate with water at a ratio of 1:1000 and apply it to the potting soil to neutralize alkalinity and mitigate soil alkalinization.

Boric acid

Boron is a micronutrient essential for plants. When plants are deficient in boron, the growing tip typically ceases to grow, young leaves become deformed, and interveinal chlorosis develops. Conditions such as “flowers without fruit” in rapeseed and “buds without flowers” in cotton are both attributable to boron deficiency.

Precautions

Boron is a micronutrient; as its name suggests, plants require only small amounts of it. Boron deficiency can lead to various problems, but excessive application of boron fertilizer can also cause phytotoxicity in the soil, so it must be used with caution.

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