For more convenient reading, I share with you the information about agricultural technology, please click on my avatar to follow me. Friends who often plant garlic, in the process of long-term planting garlic, sometimes encounter, garlic seedlings appear garlic seedlings yellow, leaf tips dry, if ignored, it may cause garlic growth potential to deteriorate, leaves yellow, dead trees, etc., the loss will be greater, garlic yellow leaf dry tip problem, almost every year will occur, is also a more common phenomenon that everyone is more concerned about. What causes the dried yellow leaves of garlic? How do we prevent it?
The dry tip of garlic yellow leaf is a concentrated manifestation caused by a variety of reasons, each of which may cause this phenomenon to occur, one is the pathological yellow leaf dry tip, and the other is the physiological yellow leaf dry tip.
Garlic pathological yellow leaves, mainly due to garlic bacterial soft rot, garlic leaf blight, garlic leaf blight and other diseases caused, the leaf damage to garlic is very large, the affected garlic leaves early yellowing, with the deepening of the disease, the leaves appear dead, the leaves lose photosynthetic ability, the yield and quality of garlic have a serious impact, these diseases are due to the reduction of garlic disease resistance, garlic environmental conditions, suitable for pathogenic bacteria germination and reproduction, when the pathogenic bacteria reach a certain level, it will cause the emergence of diseases. Compared with the pathological yellow leaves of garlic, the physiological yellow leaves of garlic seem to be more common, and to some extent, the physiological yellow leaves of garlic will gradually turn to pathological yellow leaves.
Garlic physiological yellow leaves, garlic suitable pH value in 6.5 ~ 7.0, through the perennial stubble planting of garlic, there are many farmer friends, in order to pursue one-sided high yield, constantly in their own contracted land, applied a large number of chemical fertilizer, with the extension of the planting time of garlic, fertilization more and more, garlic yield quality can not be improved with the increase of fertilizer, soil acidification, garlic growth slowly, leaves stretch slowly, plant thin, in addition to garlic seedlings center leaves slightly better, The rest of the outer leaves appear yellowish from the outside to the inside. Perennial stubble planting of garlic, trace elements in the long-term stubble planting process, gradually reduced, when reduced to a certain extent, garlic due to the lack of trace elements and yellow leaves and dry tips. Magnesium is one of the indispensable elements of all green plants, is a variety of enzyme activators, in the chlorophyll contains magnesium, lack of magnesium leaves yellow. Calcium is also a very well-known element, on the same plant, the more old leaves at the bottom, the more calcium contains, and calcium is not easy to flow in the plant. Lack of calcium, yellowing of the leaf tips.
Garlic defertilization, but also easy to cause yellow leaves, garlic physiological defertilization mainly appears in the critical period of garlic fertilizer needs, garlic planting, new leaves are extracted, in the early stage, there is a large part of the nutrition that garlic seedlings need to use, is the nutrition stored in the garlic cloves, when the garlic cloves are exhausted, the nutrients absorbed by the root system can not fully meet the growth needs of garlic for the time being, then the garlic performance dry tip yellow leaves, then the garlic should be timely fertilization, can reduce the appearance of garlic yellow leaf dry tip disease.
The countermeasures for the dry tip of garlic yellow leaves are through the increase of fully decomposed organic fertilizer, soybean cake, nitrogen, phosphorus and potassium fertilizer, medium and trace element fertilizer and other measures. Comprehensively improve the ability of garlic to resist diseases. Although potassium is very important, do not apply too much potassium fertilizer when planting garlic, according to experiments, excessive application of potassium fertilizer will affect the absorption of magnesium elements, resulting in the emergence of garlic yellow leaves, dry tip. Balanced fertilization is key.
The dry tip of garlic yellow leaves is also related to soil drought, keeping the soil moist and draining in time in case of waterlogging. Acidified soil, it is best to avoid heavy stubble planting, but also can be adjusted with lime nitrogen, lime nitrogen physiological acidity, 50 to 80 kg per acre of land, sprinkled when ploughing the land, can also effectively play a certain comprehensive role in soil acidification. Well, today's sharing is here, welcome to pay attention, like friends to like and then go.