Different plants have different symptoms of boron deficiency, but the common point is that the growth points are inhibited, the plant growth point is not normal or stagnant, the young leaves are deformed and shrunk, and irregular chlorosis between veins. The thickened lower leaves become dark blue green, the leaves and stems become brittle, reproductive growth is delayed, reproductive organs are abnormal, plants are dwarfed, and even die.
1. Wheat: Stamens are poorly developed during flowering, anthers are thin, empty and open without cracking, no loose powder, little pollen or deformity, and sometimes no pollen. Also known as "flower but not real."
2. Maize: The upper leaves become thin and interspersed with irregular white spots. In severe cases, these spots connect into 2.5-5.0 cm of leucorrhea, causing them to die. The growth point was inhibited and the tassels couldn't be extracted. The male flowers significantly degraded and became smaller and atrophied. The ear was degenerated and deformed. The apical seeds were empty and bald.
3. Soybeans: young leaves veins chlorosis, old leaves coarse thickening shrinkage, the top buds curled downwards and atrophy. The top of the main root died, many lateral roots were short, stiff and stiff, root nodule development was abnormal, no flowering or flowering was normal, and the crust was small and deformed.
4. Rape: Roots stop growing, no root hair, root surface browning, cracking, root swelling. The heart is curled and the leaves thicken. The purple leaves were seen between the leaf margins and veins of the lower leaves, and they gradually turned brown and died.
5. Peanuts: The main stem and lateral branches are short and thick, and the leaves of the top of the stem are easy to fall off, and the growing point is gradually dry and coked and necrotic. The plant type is short and appears clustered. There are obvious cracks in the stems and roots, the heart is small and shrinking, the leaves of the old leaves are dry, the leaves are thick and brittle, the roots are stunted, the root tips are brown and necrotic, the flowers are few, and the fruits are not even result.
6. Cotton: The old leaves are thickened, become hypertrophied and brittle, the veins are prominent, the leaves are dark green, the new leaves are smaller, the edges and main veins are green, the leaves are curled and curled, the petioles are shortened and thickened, the surface is rough and hairy, or the surface There are dark bands that make the entire petiole dark green and sharp. More buds, easy to fall off. A cotton plant that is severely deficient in boron has little flowering and even "buds without flowers." Lei Ling easy to fall off, into less peach. Boron seedlings are seriously deficient in boron, true leaves are born late, and a large number of lateral branches develop, forming large clusters.
7. Tomato: The cotyledons and true leaves of the seedlings are purple, and the leaves are stiff and brittle. Stem growing point black, dry, grow new branches near the growth point. The whole plant is clustered. The top branch curled yellow inwards and died.
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