The sprouting and flowering of fruit trees all require a lot of nutrients, so spring fertilization is the key, and most fruit growers are also accustomed to topdressing in the spring. However, after the spring roots dormancy is over, the vitality of root cells is increased, the growth rate is accelerated, and the root epidermis is young. This time, it is more sensitive to fertilizers and can easily cause fertilizer damage. The leaves and buds of the tree's big branches or entire trees are shrunk, dry, flowers and young fruits. Shrinkage and shedding, and even the death of the entire tree.
To avoid fertilizer damage, use the following methods:
First of all, we must correctly choose the fertilization method. At present, in the practical fertilization of fruit trees, farmers often use acupuncture methods (digging 4 holes in 4 directions around the tree), radiation gutters, annular gutter fertilization method or whole garden spread fertilization method. However, I generally do not recommend the use of cave methods, especially peach, apple, citrus, apricot and plum, but also other shallow roots fruit trees. Fertilization of fruit trees is best combined with the use of composted soil and fertilizer. When using ring groove and radiation groove fertilization, pay attention to not apply too deep or too close to large roots; do not apply fertilization in the extension direction of large roots (in the direction of large branches), and it is best to fertilize between big branches; do not repeat fertilization ( The fertilization area should change every year; the fertilization area must not be too close to the trunk. The second is the correct choice of fertilizer. According to the stability of fertilizers and the effect of fertilizers on fruit trees, the probability of occurrence of fertilizer accidents is generally ammonium bicarbonate, ammonium chloride, ammonium sulfate, unripe farmyard manure, sulfur-based compound fertilizers, and sulfur-based fertilizers. Compound fertilizer and so on.
If there is fertilizer damage after fertilization, it should be promptly remedied, and look for the corresponding large roots in the extension direction of the branches showing the symptoms of fertilizer damage. If it is found that the root part turns black and rot, it can be scraped with a cutter; if the root rot is severe, the affected part can be cut off and rotted. To the trunk can be cut off from the main stem, and sun root for 1 to 2 days, with particular attention to avoid flooding.
In addition to the nutrients of ordinary sweet potatoes, air-dried purple potatoes are also rich in selenium trace elements, lysine and anthocyanins.
1. The selenium and iron rich in purple potato are necessary elements for the human body to relieve fatigue, relieve aging and nourish blood. Selenium is easily absorbed by the human body and can be left in the serum to repair the heart muscle and remove free radicals in the body.
2. Purple potato is rich in cellulose, which can increase the volume of feces, promote gastrointestinal motility, clean up the mucus, gas and putrefaction retained in the intestinal cavity, discharge toxic substances and carcinogens in the feces, keep the stool unblocked, and improve the environment of the digestive tract , to prevent the occurrence of gastrointestinal diseases.
3. Purple potato not only does not gain weight, but can lose weight, build bodybuilding, prevent sub-health, and detoxify. Every 100 grams of fresh purple potato contains only 0.2 grams of fat, which produces 99 kcal of heat, which is about 1/3 of rice. It is a good low-fat, low-calorie food. At the same time, it can effectively prevent sugar from turning into fat, which is beneficial to Weight loss, bodybuilding.
4. Purple potato contains a lot of mucin, which can prevent the atrophy of the connective tissue of the liver and kidney and reduce the incidence of collagen disease. The minerals contained in purple sweet potato play a very important role in maintaining and regulating human body functions. Contains calcium and magnesium, can relieve osteoporosis.
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