In the growth process, leeks, garlic, and onions often show slight yellowing of the leaf tip. Most of them are normal growth phenomena, especially when they are vigorously growing. This is because after the growth of garlic and scallions, the growth of plants is accelerated, and the nutrients needed are increased. The nutrients in the garlic and the onion are exhausted. The growth of garlic and onions needs to rely on roots to absorb nutrients. Photosynthesis by leaves The production of organic nutrients is prone to appear onions and garlic sprouts with no nutrition and yellow tips. But if it does happen, it's worth noting. Common reasons are:
1. Soil acidification causes dry tips. Neutral soil is suitable for the growth of leeks, onions and garlic, and is most suitable for pH 7-7.4. When organic manure is used less, a large amount of ammonium sulfate and superphosphate are used to make the soil acidified, causing leek, onion, and garlic leaves to grow slowly, being thin and weak, and the outer leaves are yellow.
Apply sufficient decomposed organic fertilizer per acre and apply 10-40 kg/mu lime to adjust the soil pH.
2. Drought causes dry tips. During the production process of leeks, onions, and garlic, it is necessary to pay attention to timely watering, the soil is dry, and the plants lack of water can easily cause dry tips.
According to the different needs of the different growth periods of vegetables for water, timely and appropriate watering. Such as onion seedlings: appropriate water control, do not do not cast, 15-20 days pouring a small water; vegetative growth period: combined with top dressing, soil watering in time to ensure adequate water supply, so that the field holding water at 70% - 80%; Harvesting period: Watering is controlled 10-15 days before harvest to maintain the field capacity at 60%-70%.
3. Lack of trace elements causes dry tips. The lack of calcium heart tip yellow, physiological obstacles, lack of magnesium outer leaves yellowing. Prevention and control measures: You can combine watering, per acre with 400ml of fruit and vegetable calcium fertilizer + 200ml of sea chlorophyll. Not only can increase the yield and quality, but also can make Leek, onion, garlic roots developed robust.
4. Dry tip caused by high temperature and frost damage. The growth temperature range of leeks, onions and garlic is 7°C-35°C. When the temperature exceeds 35°C, the tips of the leaves are dry and below 7°C, the tips of the leaves turn white after being chilled at low temperature.
For the cultivation of leeks, onions, and garlic in open fields, attention should be paid to water cooling at high temperatures, and exhalation in greenhouses to prevent the occurrence of high temperatures above 30°C. Winter and spring cold seasons to strengthen insulation, so that the minimum temperature of not less than 7 °C.
5. Drizzle caused by dry tip. The agent concentration is too high, making the tip white and dry.
Appropriate concentration of liquid medicine is controlled during spraying, and chlorophyll can be sprayed 2-3 times after occurrence of phytotoxicity, so as to relieve phytotoxicity in time.
6. The dry tip is caused by the damage caused by underground cockroaches. The fly larvae infested on the root of the onion and caused damage to the aboveground shoot tips. The uprooted plants showed that the roots of the plants turned brown, and the roots were rotted or withered when severed.
Adult stage, the choice of A. venom 2000 times, sprayed at 9-11 am, sprayed every 5-7 days, even spray 2-3 times. When the larvae hatch and the larvae in the field (as soon as possible the better), can be used Avid 500 times Irrigation roots, every other 7-10 days, irrigation 2-3 times.
The anesthetic mask can be attached to the patient's face, delivering oxygen and volatile anesthetic gas to the patient.
Oxygen Masks are devices that are constructed to supply oxygen or other gases to an individual. Masks of this type fit snugly over the nose and mouth, and are equipped with a tube that connects the Oxygen Mask to a storage tank where the oxygen is contained. The Oxygen Mask is made from PVC, as they are light in weight, they are more comfortable than some other masks, increasing patient acceptance.
The Nebulizers are connected by tubing to a compressor, that causes compressed air or oxygen to blast at high velocity through a liquid medicine to turn it into an aerosol, which is then inhaled by the patient, and the medicine in the form of a liquid solution is loaded into the device upon use. The Nebulizers are commonly used for patients in hospitals who have difficulty using inhalers, such as in serious cases of respiratory disease, or severe asthma attacks, it is also for ease of use with young children or the elderly.
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