Flowers in the growth and development process requires a lot of nitrogen, phosphorus, potassium, calcium, magnesium and other elements, but also a small amount of iron, manganese, zinc, copper and other trace elements. When there is a lack of certain elements, there will be a corresponding lack of symptoms. In the fall, after the flowers and trees have passed the test of summer, they will lack certain elements to varying degrees. At this time, we must look at the leaf color to properly "taste" the flowers.
In the absence of nitrogen, the plant growth is weak, the leaf color is light green, and the base leaves yellow or light brown; in the absence of phosphorus, the leaves are blue-green and slightly purplish; in the absence of potassium, the old leaves are light green and the tips of the leaves are small, but the veins Still green, generally no withering. Nitrogen, phosphorus, and potassium fertilizers should be added according to specific conditions.
If there is a long period of iron deficiency, the tips of leaves and leaves will gradually wither and expand inwards, but the large leaves will remain green. At this time, spray the leaves with 0.05% to 0.1% ferrous sulfate solution.
In the case of magnesium deficiency, the old leaves yellow from the leaf margin inward, the veins still appear green, the leaves appear yellow streak, shrinkage, the leaves often withered in the late stage, the leaves are small, the flowers are small and pale, and the plant growth is inhibited. Spray 0.2% to 0.4% magnesium sulfate solution 2 to 3 times. In the absence of calcium, the terminal buds are susceptible to injury and death. The tips of the leaves and the leaf margins are dead. The tips of the leaves are often bent into hooks and the root system is necrotic. In severe cases, the whole plant died. At this time, 0.2% to 0.4% of lime water should be poured, 20 to 30 ml per plant, and 2 to 3 times of continuous pouring.
It should be noted that because the sensitivity of flowers and trees to the lack of the same element is different, and the symptoms of various nutrients often show similarities, they must be further confirmed in other ways. There are two ways to confirm this: First, determine what kind of elements may be lacking from the initial judgment of leaf color. Take this element fertilizer and mix it with a certain concentration of solution. Use a brush to apply it on the back of the leaf with light illness, or spray on the diseased plants. 7 to 10 days after the observation of the condition rehabilitation. If the disease is recovered or if the growth rate of the new leaf is significantly increased and the leaf color is normal, it may be confirmed that the flowers lack the kind of elements sprayed or applied. The second is to take a finger-shaped small glass tube, containing the solution to be tested, and tie it to the diseased plant. Then cut off the leaves on both sides of the main vein of a diseased leaf and immerse the main vein in the glass tube solution. If the tested strains return to normal within 7 to 10 days, it can be confirmed that the flowers lack the tested elements.
Lycium barbarum polysaccharides(LBP)have been identified as one of the active ingredients responsible for biological activities. Polysaccharides are isolated from dried Lycium barbarum through the way of boiling water extraction.
The content of Goji polysaccharide is more than 6% in dried Goji, 1.5% in the Goji raw juice and 4.5% in the Goji concentrated juice.
In China, many experts have begun to research the medical theory and component of Goji since the early 1900s. In recent yaers, through abundant medical theory research, the experts here and abroad found that the Goji has the functions as folloing.
1. Ajusting immunity,
2. Anti-aging,
3. Anti-tumor,
4. Anti-fatigue,
5. Anti-radiating damage,
6. Reducing the blood fat and sugar,
7. Decreasing blood pressure,
8. Protecting the genital system,
9. The other pharmacological action.
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