When the crop is deficient in magnesium, the leaves usually lose green. The inter-pulse color from the tip of the leaf and the edge of the leaf becomes lighter, turning from pale green to yellow and then purple, then expanding to the base and center of the leaf, but the vein remains green and forms on the leaf. Clear mesh veins; in severe cases, the leaves wither and fall off. The symptoms of magnesium deficiency in major crops are as follows.
(1) Wheat: yellow streaks appear between the veins of the leaves, and the residual small green spots are connected in a string like a bead. The heart leaves are straight, the lower leaves are drooping, and the angle between the old leaves and the new leaves is large. Sometimes the irregular fringe of the lower leaf edge appears.
(2) Corn: yellowish streaks appear in the lower leaves, and then become white streaks. The severe inter-pulse tissue is dry and dead, showing purple-red piebald leaves, while the new leaves become lighter.
(3) Potato: The tip and edge of the old leaf are chlorotic, expanding along the vein to the center, and the lower leaf is brittle. In severe cases, the plants are short, the roots and tubers are inhibited, the lower leaves are curled to the foliage, the leaves are thickened, and finally the chlorotic leaves turn brown and die.
(4) Rice: The plant is yellowed, the leaves are chlorotic, and the middle and lower leaves are inclined downward from the lobes.
(5) Soybean: The chlorotic between the pre-growth veins turns dark yellow with small brown spots, but remains green near the leaf base and veins. Magnesium is deficient in the late growth stage, the leaf edge curls downward, the edge gradually turns yellow inward, and the whole leaf is orange or purple.
(6) Peanut: The edge of the old leaf is chlorotic and gradually expands toward the midrib, while the posterior leaf margin turns purple.
(7) Cotton: the old veins are chlorotic, the veins remain green, the reticular veins are very clear, and sometimes there are purple plaques on the leaves or even the whole leaves turn red, showing red leaves and green veins, and the newly shaped leaves are then chlorotic and light. The cotton and eucalyptus leaves also turn light green.
(8) Brassica napus: The purple and red plaques were firstly present on the back and edge of the cotyledon cotyledons. The inter-pulse chlorosis of the lower leaves of the lower and middle leaves in the middle and late stages gradually expanded inward, and the chlorotic part changed from light green to yellowish green. Fuchsia, plant growth is blocked.
(9) Tobacco: The tip, edge and vein of the lower leaf are chlorotic, and the veins and the surrounding area remain green. In the extreme absence, the lower leaves become almost white, with very few dry or necrotic spots.
(10) Tomato: The new leaves are somewhat brittle and curl upwards. The old veins are yellow and then brown and withered. Lack of green yellowing gradually develops into young leaves, and the leaves lack symptoms in the fruiting stage, but rarely show symptoms on stems and fruits.
FENGCHENG CITY HEQI BRUCITE MINING CO., LTD is registered in Dandong city, Liaoning province. Sufficient talent reserves, proper environmental governance, convenient transportation and communication.We are mainly engaged in the purchase, processing and sales of mineral products.
Main products: magnesium hydroxide flame retardant and brucite powder. Complete specifications of products, welcome to visit our factory guidance.
Since its inception, with "business integrity, standard services, sustainable development, commitment to the community" is the principle of the company. Our company has a good reputation, which is oriented by customers' demands, strives for survival by quality reputation, relying on high-quality products and good services.