(1) Nitrogen deficiency: Seedling growth is not fast, the plants are thin and thin, and the leaves are small and thin, yellow-green or light green; nitrogen deficiency in the middle of growth, early yellowing of the lower leaves, small flower discs, and poor growth of vegetative organs, resulting in plants Premature aging.
(2) Phosphorus deficiency: Plants and flowers are stunted.
(3) Potassium deficiency: The plants grow slowly, the leaves turn yellow, and brown spots appear on the leaves. These spots finally dry out and fall into thin flakes and fall off, and the oil content drops.
(4) Calcium deficiency: Stalk curvature occurs both before and after flower formation.
(5) Sulfur deficiency: pale leaves and inflorescences, short internodes, and short plants.
(6) Magnesium deficiency: chlorosis between veins.
(7) Manganese deficiency: Leaves reticular chlorosis.
(8) Boron deficiency: After the cotyledon is opened, the growth point is damaged or died, or the axillary bud germinates to form a plant. The birth is not normal, the plant is short, and the stem has a brown hook longitudinal band mark. After the formation of the disk, the stems supporting the disk lose their ability to follow the sun, and some have low heads, some heads are overturned, the lower leaves are hypertrophy, dark green, the upper leaves are small and curly, the leaves are chlorotic, the veins are prominent
(9) Deficiency of zinc: Growth is impeded, and the upper lobe becomes yellow and necrotic.
(10) Iron deficiency: The upper leaves turned yellow and the veins remained green.
(11) Copper deficiency: Upper lobe and corolla malformation.
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