What fertilizer is lacking in corn yellow leaves? The leaves are yellow, and there is a lack of fert

1.Plants lack nitrogen, the old leaves first begin to turn yellow, and then gradually turn yellow from the bottom up, timely supplement from the roots or leaves with urea, ammonium bicarbonate, ammonium sulfate and other nitrogen fertilizers, you can promote the leaves to turn green.

2.Crops lack phosphorus, the whole plant will turn dark green, and no luster, the leaves will also turn yellow, timely supplement of superphosphate and other phosphorus fertilizers, can promote the leaf to restore luster.

3.Crops, fruit trees, vegetables and flowers are deficient in potassium, the leaves will be uneven, and the edges of the leaves may also turn yellow and withered.

4.Plant iron deficiency, young leaves and old leaves at the same time yellowing, young leaves of the mesophyll yellow, leaf veins green, the formation of a network of yellow leaves, generally watered ferrous sulfate, but the concentration should not be too large, can be applied in stages, to avoid burning roots.

5.Crops lack calcium, young leaves turn yellow and curl, can be applied to crushed eggshells and other calcium fertilizers to reduce the harm.

6.Plants are deficient in magnesium, the leaves turn green and yellow, and finally dry up and die, and calcium, magnesium, phosphorus, and magnesium sulfate fertilizers are applied in time.

7.Crops are deficient in sulfur, leaf veins are yellow, and ammonium sulfate is applied in time to promote the leaves to turn green.

8.In strong alkaline soils, yellowing of leaves will also occur, and acidic fertilizers such as rice washing water and ferrous sulfate can be applied to change the soil environment.

9.Overwatering or stagnant water, the young leaves of the plant turn yellow, excessive drought, the old leaves begin to turn yellow, gradually aggravated from the bottom up, and even the whole plant dies, adjusting the soil moisture can be effectively remedied.

10.Too much fertilization or too short interval time will cause fertilizer damage, and the young leaves will be uneven, but the leaves are thick and shiny, and the symptoms can be alleviated by controlling fertilizer watering and cultivating loose soil.

In addition to the variety of corn, sowing. The phenomenon of yellow leaves caused by underground insect pests and pesticide pests. However, the lack of nutrients, zinc, molybdenum and iron in corn plants will cause the leaves of the plant to lose green and turn yellow, or the leaves of old corn plants will lose green and turn yellow, the leaf edges will be scorched and curled inward, and the grains will shrink.

Of course, corn yellow leaves may also be caused by too much water, too little watering, too much light, too little light, leaf blight, too much fertilizer, long-term lack of fertilizer, too low temperature, too high temperature and so on. Excessive fertilizer is mainly reflected in the hypertrophy of new leaves of the plant, and many are uneven. Or the leaf stem begins to turn yellow, gradually spreading outward to the entire leaf, and the leaf falls off in a large area.

Farmers should immediately stop fertilizing, increase the amount of watering, and repeatedly water several times so that the fertilizer decomposes quickly. The lack of nutrients in the soil without fertilization for a long time leads to the thinness of the branches and leaves of the corn plant, the thin, yellow and curled leaves, and even the phenomenon of dryness. In this regard, farmers should apply liquid nutrient fertilizer scientifically, about 3 times, once every 5 days.

The concentration must be low, and organic fertilizer can be applied once in the later stage to ensure the healthy growth of the plant.

The phenomenon of yellow leaves occurs due to lack of nutrients in corn plants, and yellow seedlings will also occur due to insufficient nutrients in corn plants. For example, when nitrogen is deficient, the leaves of the plant begin to turn yellow from the tip of the leaf. When the plant is deficient in iron, the new leaves also begin to lose green, and yellow-green streaks appear.

When the plant is deficient in molybdenum, the leaves will turn yellow and have spots on the leaves. When magnesium is deficient, the lower leaves of the plant will turn yellow, and yellow-white stripes will appearThese situations that cause yellow leaves of corn plants must be clearly distinguished by farmers in order to prevent and control the symptoms.

In the process of planting corn, farmers need to ensure that the bottom fertilizer is applied sufficiently, but not excessively, and the specific amount can be different according to different regions and different fields. Need to choose some high nitrogen, low phosphorus and low potassium or high nitrogen, low phosphorus and potassium compound fertilizer as the base fertilizer, if the fertilizer is too little, corn after emergence of nutrients, can be appropriate topdressing urea or spray medium and trace elements of foliar fertilizer, for supplementation and alleviation.

If nitrogen is lacking, you can buy relevant fertilizers and dilute them with water for irrigation. In addition, corn yellow leaves may also be watered too much, resulting in rotten roots, nutrients can not go up, and the leaves will be yellow.

1.If there is a lack of nitrogen fertilizer. The tips of its leaves will turn yellow.

Pass through the leaves, then slowly turn the entire leaf yellow. 2.In the absence of potassium, it grows very slowly, and the leaves begin to turn yellow and dry up.

Potash is the most important nutrient for photosynthesis.

Compound fertilizer, because this fertilizer has a lot of nutrients, corn can be absorbed, and they should be watered in the right amount, so that they will grow fuller.

In this case, you should be able to apply some urea, or foliar fertilizer, in this case, it should be caused by a lack of fertilizer, you can also try it.

1. Lack of nitrogen fertilizer:Nitrogen fertilizer is very important in the process of plant growth, once the lack of nitrogen fertilizer, the old leaves of the plant will begin to yellow, and then the whole plant will appear from the bottom up, the leaf yellowing phenomenon. It is necessary to supplement nitrogen fertilizer in time, and apply urea, ammonium nitrate, and bean dregs to plants to make their leaves green.

2. Lack of phosphate fertilizer:The yellowing of the leaves may also be due to a lack of phosphate fertilizer, which can turn dark green and lose its vitality and luster if the plant grows under. And the leaves are yellow.

At this time, it is necessary to supplement phosphate fertilizers such as ammonium phosphate, white phosphorus fertilizer, animal ashes or bone char in time to restore the luster of the leaves.

3. Lack of potassium fertilizerSufficient potassium fertilizer will make the leaves smooth and flat, otherwise there will be uneven leaf surfaces, and the edges of the leaves will slowly appear yellow and withered. At this time, it is necessary to supplement potassium fertilizer in time, and apply plant ash or chemical fertilizer potassium chloride at the bottom of the pot to make the potassium fertilizer sufficient, and the plant leaves become flat and smooth again.

Many corn growers report that the corn in their corn fields has yellow leaves, and in view of this phenomenon of corn leaves turning yellow, growers must pay attention to it, because yellow leaves will not only affect the yield of corn, but may also appear more serious diseases in the later stage.

First, the problem of corn seeds.

If there is a problem with the seed itself, it is inevitable that the corn seedlings will appear yellow, and the corn seeds are not full, or the seeds are old, or the seeds of poor quality for other reasons are the direct causes of the yellow leaves of the corn.

The prevention of this situation is mainly not to buy miscellaneous seeds when buying seeds, to buy seeds that are suitable for local planting, and good seeds, once found to have yellow leaves after planting, top dressing and additional foliar fertilizer spraying, to ensure that corn growth needs sufficient nutrients.

Second, the seeds are sown too deeply.

Once the corn grows too deeply, the nutrients consumed will become larger, and there will be no seedlings and weak seedlings after emergence; Then, as the corn grows, the leaves slowly turn yellow.

The prevention of this situation is first of all prevention in advance, the depth of sowing is best between 3-5cm, if it is found that the sowing is too deep, if the lack of seedlings should be replenished in time; Weak seedlings should be sprayed with foliar fertilizer to alleviate them.

3. The density of planting is too large.

There are many friends who plant corn too densely, thinking that the density will be high, in fact, this view is wrong, corn planting density is large, plants will compete with each other for nutrients, high density will also cause poor ventilation in the field, affect the growth of corn in the field, corn will appear yellow leaf symptoms.

The solution of this situation is mainly to control the amount of seeds at the time of sowing, and then to carry out the seedlings when the corn has 3-5 leaves after the emergence of seedlings, and pull out the crowded corn seedlings, don't be reluctant, which is good for the corn behind.

Fourth, corn plants lack fertilizer.

This situation is often caused by insufficient application of base fertilizer in the early stage of corn planting, corn is a nitrogen-loving crop, and must be given enough nitrogen fertilizer, if the nitrogen fertilizer is applied too little at the time of sowing, it is necessary to add urea in time to promote the normal growth of corn. You can also spray a little fertilization with amino acids on the fertile leaves.

5. Other reasons.

If the temperature is too high, corn loses water quickly and has less chlorophyll. Water and fertilizer ** insufficient. In the case of water scarcity, fertilizer uptake is limited.

The yellowing of the leaves may be caused by nitrogen deficiency fertilizer, and in addition to the yellowing of the leaves, there will also be dwarf plants and yellowing of the tips of the lower leaves. It may also be caused by a lack of phosphorus fertilizer, in addition to the yellowing of all the leaves, the leaves will also appear brown spots, and the edges and tips of the leaves will appear dry and burned. In addition, it may also be caused by water shortage, drought, pests and diseases, improper medication, poor seed quality, etc.

Hello, nitrogen fertilizer can be supplemented.

Reasonable watering: If the yellow leaves are caused by drought, they should be replenished as soon as possible and watered thoroughly. If there is water in the plot due to too much precipitation, the water should be drained as soon as possible.

Reasonable top dressing: If corn lacks potassium and is prone to yellow leaves, more plant ash or spraying potassium dihydrogen phosphate foliar fertilizer should be applied. If it is caused by zinc deficiency, each acre of land can be cleared by applying kilograms of zinc sulfate.

Prevention and control of pests and diseases: If it is caused by infection with pests and diseases, it should be sprayed with pesticides and management.

Summary. Hello dear, corn yellow leaves are caused by the lack of nitrogen in the corn body and soil, nitrogen is the main component of chlorophyll, photosynthesis is related to the amount of chlorophyll, more nitrogen is chlorophyll formed, photosynthesis is vigorous; Nitrogen deficiency reduces chlorophyll, leaves become lighter, and in severe cases, they lose their green color, and cannot photosynthesize, resulting in dry and falling off leaves. When melons and vegetables are deficient in nitrogen, the leaves first lose their green and yellow from the base, and finally dry up and fall off.

Hello dear, corn yellow leaves are caused by the lack of nitrogen in the body and soil of corn, nitrogen is the main component of chlorophyll, photosynthesis is related to the amount of chlorophyll, more nitrogen is chlorophyll formed, photosynthesis is vigorous; Nitrogen deficiency reduces chlorophyll, leaves become lighter, and in severe cases, they lose their green color, and cannot photosynthesize, resulting in the drying and falling of orange leaves. When melons and vegetables lack nitrogen, the leaves first lose their green, wither and yellow from the base of Hengyi, and finally dry up and fall off. Workaround:

It can also be caused by pests.