The tomato's growth and development process needs to absorb a variety of nutrients. The physiological disease caused by the lack of a certain kind of nutrient elements in tomato is called deficiency syndrome or nutrition disorder.
1. Nitrogen deficiency disorders. In the absence of nitrogen, the plants grew slowly and became spindle-shaped. The old leaves were yellow-green in the early stages. The whole plant was light green in the later stage. The leaves were narrow and thin, and the inflorescence was exposed, commonly known as “dewâ€; the veins changed from yellow-green to deep purple. Stems harden, dark purple, and rich in fiber. Yellow flower buds, easy to fall off, small fruit, rich in wood. Found that nitrogen deficiency, timely use of urea, ammonium bicarbonate and other available nitrogen fertilizer or human excrement ditch buried application, or with 0.3-0.5% urea solution foliar spray.
2. Phosphorus deficiency disorders. In the absence of phosphorus, the early leaves were purple-red in the back, and the leaf tissue began to be spot-like, and then spread to the entire leaf. The veins gradually turned purple, and the leaf clusters were purple at the end. The stems were long and rich in fiber. The leaves are small and the result is delayed. Due to the impact of nitrogen deficiency on phosphorus uptake, the plants showed leaf curling at later stages. Found that phosphorus deficiency, superphosphate and quality organic fertilizer can be mixed in a ratio of 1:1 after the ditch in the vicinity of the root topdressing, can also be used 0.2% -0.3% potassium dihydrogen phosphate solution or 0.5% superphosphate leachate leaves Surface spraying.
3. Potassium deficiency disorders. In the absence of potassium, the leaves of the old leaves were burned, the leaf margins curled, and the veins were chlorogenic. Some varieties showed brown spots on the chlorotic area. After the old leaves fell off, the stems became lignified and no longer increased. Crude. The roots are stunted, weaker and often brownish. Obviously obstructed fruit development, fruit shape is not correct, different maturity, can be colored, but uneven; plants susceptible to gray mold. Preventive measures: mainly increase potassium fertilizer and organic fertilizer, generally every 667? Potassium sulfate or potassium chloride can be used 10-15 kg, on both sides of the plant ditching topdressing; also available 0.2% -0.3% potassium dihydrogen phosphate solution or 1% of plant ash leachate foliar spray.
4. Calcium deficiency disorders. When calcium deficiency occurs, the top of the young leaves is yellow, the plants are thin and wilting, the terminal buds are dead, necrotic tissues appear around the terminal buds, the roots are undeveloped, the roots are short, and the branches are numerous and brown. The fruit is susceptible to umbilical rot, heart rot and empty fruit. In the growth period or when plants are found to be deficient in calcium. Spray with 0.3%-0.5% calcium chloride or calcium nitrate solution.
5. Magnesium deficiency disorders. In the absence of magnesium, the old leaf veins lose their green tissue and develop toward the leaf margin. When the magnesium deficiency is mild, the temporal lobe grows normally. When it is severe, it expands to the small veins. Only the main loquat remains green, and finally the whole plant turns yellow. It is also possible to use foliar spraying with 1%-3% magnesium sulfate or 1% magnesium nitrate solution when the magnesium deficiency is found during the growth period.
6. Sulfur deficiency disorders. In the absence of sulfur, yellowing of the veins between the leaves, petioles and stems became red, internodes shortened, and leaves became smaller. The plants are light green or yellow-green. When the plants were found to lack sulfur during the growth period, they were sprayed with 0.01%-0.1% potassium sulfate solution.
7. Iron deficiency barriers. In the absence of iron, the tip leaves are chlorotic, developing from the parietal lobe to the old lobe, with mild tissue necrosis. When iron deficiency was found during the growth period, the plants were sprayed with 0.5%-1% ferrous sulfate solution.
8. Boron deficiency. In the absence of boron, the most prominent symptom is the loss of green or yellow orange in the leaflets, and the growth point becomes dark. When boron is severely depleted, the growing point withered and died. The leaflets of young leaves lost chlorosis between veins, with small patches, small leaves, and inward curls. The stems and petioles are fragile and easy to fall off the leaves. Roots grow badly brown. The fruit is deformed and the skin has brown stains. When boron deficiency was found in the seedling, flowering and harvesting stages, the plants were sprayed with 0.05%-0.2% borax or boric acid solution.
9. Lack of manganese barriers. In the absence of manganese, the leaves between the main veins of the leaves yellowed and showed macules. The veins remained green and neonatal lobular necrosis. Due to the obstruction of chlorophyll synthesis, the growth and development of the plants were seriously affected. In the absence of severe manganese, it cannot bloom and become strong. During the growth period, plants were found to be deficient in manganese, and they were sprayed with 1% manganese sulfate solution leaves.
10. Zinc deficiency. In the absence of zinc, the leaves at the top of the plants are small, the vegetative veins are slightly chlorotic, and the plants are dwarfed. The old leaves are smaller than normal, without losing the green, but there are irregular wrinkled brown spots, especially petiole. The petiole is curved backwards in a circle, and the damaged leaves quickly become necrotic and can completely wither and fall off within a few days. When zinc deficiency was found at the seedling stage, flowering stage and early harvest stage, the plants were sprayed with 0.1% zinc sulfate solution.
11. The lack of molybdenum barrier In the absence of molybdenum, the old leaves will be whitish green, and the yellow leaves will appear between the leaf margins and leaf veins. The leaves will curl upward and the tips of the leaves will agglomerate and gradually move inward. The light will affect the flowering and the death will occur. During the growth period or when no molybdenum was found in the plants, they were sprayed with 0.01%-0.1% ammonium molybdate solution.
Nuts can generally be divided into two types: one is seeds, such as sunflower seeds, pumpkin seeds, peanuts, etc.; the other is tree nuts, such as pistachios, hazelnuts, cashews, walnuts, pine nuts, walnuts, chestnuts, almonds. And the macadamia and pecans that have been very hot in the past two years. These nut foods contain more protein, calcium and a variety of vitamins, which can provide the body with a variety of nutrients needed by the brain and body.
In general, a nut is a closed fruit classification of a nutrient-covered woody or leathery hard shell. The skin is hard and contains one or more seeds. It includes two types of tree nuts and fruit seeds, walnuts, chestnuts, pistachios, almonds, etc., which belong to the fruit seed class.
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