Common symptoms of plant nutrient deficiency
Nitrogen deficiency: Light green plants, old yellow leaves at the base, brown when dry. Stems are short and fine, with few branches or tillers and premature aging. If fruit trees lack nitrogen, they are characterized by small fruit, few fruit, and hard skin.
Heat exchanger with spiral plate design is formed by steel plate bundle as a whole, forming two identical spiral channels. Two heat transfer medium are meant to meet a counter-current flow, to greatly enhance the heat exchange effect.
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Distance column, special steel bar inside of the spiral plate heat exchanger, also contributes to its stable connection between plates, and also offers a turbulence flow among the channel for efficiency consideration.
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Phosphorus deficiency: dark green plants, often red or purple, dark green when dry. The stems are short and fine, the base leaves turn yellow, the flowering period is delayed, and the seeds are small and not full.
Potassium deficiency: The stems are easily lodged, the edges of the leaves are yellow, scorch, and fragmented, and necrotic spots appear between the veins. The entire leaf is sometimes curled or shrunken, and the brown roots are more. Grain crops and other sugar-rich crops require large quantities of potassium at later growth stages, such as cereals and potatoes, sweet potatoes, watermelons, and grapes.
Magnesium deficiency: yellowing leaves, sometimes variegated (and the difference in nitrogen deficiency), veins are still green, and veins turn yellow, sometimes purple, necrotic spots appear.
Iron deficiency: pulsating between veins, showing a clear reticular pattern. When severe, the entire leaf, especially the young leaves, is pale yellow or even white. Northern fruit trees such as apples and pears are prone to symptoms.
Boron deficiency: first appear at the top, if the top stops growing. Deformity and shrinkage of young leaves. Irregular green leaves. The "flowers that are not real" in rape, the "buds without flowers," the apple's fruit disease, and the heart rot of radish are the causes of boron deficiency.
Zinc deficiency: Leaves clustered, spots appear on both sides of the leaves, the plants are short, the internodes are shortened, and the growth period is delayed. If the tree's lobular disease, maize white flower seedlings and so on.
Copper deficiency: The new leaves are chlorotic, and the tip of the leaf is curled like a paper cocoon. The leaves show necrotic spots and then wither and die. For example, cereal grains are clustered and the top of the plant is white. When it is severe, it does not produce heading and is not strong. The lack of copper in fruit trees showed the top leaves were clustered, and the leaves and fruits were all faded.
Manganese deficiency: small necrotic spots appear between veins, and dark green stripes appear as ribs. Such as citrus manganese deficiency.