Soybean is deficient in manganese, and the new leaves are light green to yellow, forming "macular spot disease" and "grey spot disease". The veins are yellowish and appear gray or brown spots. In severe cases, the lesions die and the leaves fall early. Foliar spray can be carried out using 0.01% to 0.02% of an aqueous solution of manganese sulfate. Soybean is deficient in molybdenum, the leaves are thick and wrinkled, the leaves are light, and many small taupe spots appear. The edges of the leaves are curled upwards, which are cup-shaped, and the nodules are small and small, and the growth is poor. It can be sprayed with 0.05% to 0.1% aqueous ammonium molybdate solution.
The lack of molybdenum in soybean is first manifested in the old leaves, the leaves are chlorotic, the taupe spots appear and spread throughout the leaves, the leaves become thicker and wrinkled, and some of the leaves are curled up into cups. The lack of molybdenum can cause nitrogen deficiency in legumes. . It can be sprayed with micro-supplemented bean, phosphorus, potassium, zinc and molybdenum liquid fertilizer formula, sprayed at the seedling stage, developed with root system, strong seedlings and strong anti-freezing ability; flower spray, promote flowering and pod formation; The seeds are full and the yield is high.
What are the specific manifestations of soybean deficiency?
First, the lack of nitrogen is first true yellow leaves, when severe, from the bottom up yellowing, until the top of the new leaves. There are parallel continuous or discontinuous iron plaques along the veins on the compound leaves. The chlorotic spreads from the tip to the base, and the whole leaves are pale yellow, and the veins are also green. The leaves are small and thin, easy to fall off, and the stems are slender.
Second, the lack of phosphate root nodules, slender stems, the lower leaves of the plant are dark green, the leaves are thick, uneven, narrow and long. When phosphorus deficiency is serious,
Soybean deficiency is yellowish brown, and the whole leaf is yellow.
Third, the potassium deficiency leaves are yellow, and the symptoms develop from the lower leaves to the upper leaves. The edge of the leaf begins to produce chlorotic spots, which expand into pieces, which are connected by plaques and spread to the center of the leaves, and only green around the veins. Yellow leaves are difficult to recover, the leaves are thin and easy to fall off. Plants with severe potassium deficiency can only develop to the pod stage. The roots are short and the nodules are few. The plants are thin.
Fourth, the calcium deficiency leaves yellow and have brown dots. Starting from the middle of the leaf and the tip of the leaf, the leaf margin and vein are still green. The edge of the leaf is drooping and twisted, the leaf is small, narrow and long, and the tip of the leaf is sharply fished. When the calcium deficiency is severe, the top buds die, new leaves grow in the upper leaf mites, and soon turn yellow. Delayed maturity.
5. Magnesium deficiency can be manifested in the three-leaf stage, mostly in the lower part of the plant. The leaves are small, the leaves are gray spots, and the plaques are dark in color. Some diseased leaves are reversed, rolled up, and sometimes orange and green two-color interstitial spots or reticular veins are divided into orange erythema; some middle leaves are reddish brown, and become black when mature. The leaf margin and veins are smooth and smooth.
Sixth, the sulfur-deficient veins and mesophyll are all large beige plaques, and the infected leaves are easy to fall off and late.
7. The iron handle and stem are yellow, which is deeper than the yellow when copper is missing. The top leaves of the plants appear in the functional leaves, and the young leaves on the branches are also susceptible to disease. Generally, only the main and branch veins are seen, and the tip of the leaf is light green.
Eight, the lack of boron 4 leaves after the start of the disease, flowering into the prosperous period. The new leaves are chlorotic, the leaf flesh appears dense and faint plaques, the upper leaves are lighter than the lower leaves, and the leaves are small, thick and brittle. When the boron deficiency is serious, the top new leaves are shrunk or twisted, and the upper and lower leaves are reversed, and the individual leaves are tubular, and sometimes the leaf back is reddish brown. Development is blocked and stagnant, late maturity. The main root is short, the root and neck are enlarged, and the nodule is small and small.
Nine, the lack of manganese upper leaves are chlorotic, the leaves are orange-red spots on both sides, the spots have 1-3 pinhole-sized dark red spots, and the trailing veins are uniformly distributed with the same size of brown spots, shaped like a scorpion. In the later stage, the new leaf veins measured the black spots of the size of the pinholes, the new leaves were rolled into a lotus flower shape, the whole leaves were yellow, the black spots disappeared, and the leaves fell off. In severe cases, the top buds die and are late.
X. The leaf veins of the upper compound leaves of the copper-deficient plants are green, and the rest is light yellow, sometimes producing large white spots. The new leaves are small and clumped. When the copper deficiency is serious, there are yellow spots on the sides and tips of the leaves. The plaques are easily curled into a tube shape, and the plants are short and cannot be strong in severe cases.
11. The lower leaves of zinc deficiency have chlorotic characteristics or dead spots, and the leaves are long and narrow, twisted, and the leaves are light. The plants are slender and late.
Twelve, the lack of molybdenum upper leaves are light, the main and branch veins are lighter. There is a contiguous macular between the branches, the leaf tip is easy to lose green, and the color of the posterior macular is deepened to light brown. Some of the blades are uneven and distorted. Some of the main veins are in the center of the veins.
This article URL: The symptoms of soybean deficiency syndrome, what is the performance of soybean deficiency of manganese, deficiency of molybdenum and zinc deficiency?
Vitamins are a type of trace organic substances that humans and animals must obtain from food in order to maintain normal physiological functions. In terms of physiological functions, vitamins are neither a raw material for tissues nor a substance for supplying energy, but they are an indispensable substance for the body. It has many types and different chemical structures. Most of them are the components of the coenzyme (or prosthetic group) of certain enzymes. They are the indispensable compounds for maintaining the normal growth (growth, health, reproduction and production function) of the body. It plays a catalytic role in the body to promote the synthesis and degradation of major nutrients (proteins, fats, carbohydrates, etc.), thereby controlling metabolism. Vitamins are essentially low-molecular organic compounds. They cannot be synthesized in the body, or the amount synthesized is difficult to meet the needs of the body, so they must be supplied from the outside. The daily requirement of vitamins is very small (usually measured in milligrams or micrograms). They are neither a raw material for body tissues nor a substance for energy supply in the body. However, they do not regulate material metabolism, promote growth and development, and maintain physiological functions.
Vitamin K2 MK-7, Vitamin C, Vitamin E, Vitamin K2, Vitamin H, Vitamin D3
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