What is the reason for the lack of seedlings and broken ridges of summer corn and the lack of germin

Hello, first, the actual sowing amount is small or the wheat straw plugs the cocoon legs. Summer-sown corn is basically sown with stubble, due to the local field accumulation of wheat straw and uneven land, resulting in the seeds not being sown into the soil, resulting in a small actual sowing amount. In addition, if the seed hole under the cocoon leg is blocked by foreign matter such as straw during sowing, it is easy to cause ridge breakage.

If the wheat straw is sprayed unevenly during harvesting, it should be evenly thrown or cleared out of the field by hand.

Second, the quality of seeds is poor. There are many corn seed grains, disease and insect grains, and it is easy to have the phenomenon of lack of seedlings, broken ridges and large and small seedlings. Uncoated seeds are susceptible to underground pests.

Regular packaging of corn seeds after selection, coating, uniform grains, can effectively control underground pests and diseases, it is recommended not to buy bulk, quality can not be guaranteed seeds, to buy selected, coated seeds.

Third, the bottom moisture is insufficient and uneven. Insufficient and uneven soil moisture will cause lack of seedlings, broken ridges or inconsistent early and late emergence of seedlings. Generally, when the soil moisture of the tillage layer reaches 60% or 70% of the water holding capacity in the field, it is the soil moisture suitable for sowing. If the soil moisture is insufficient at the time of sowing, water it to create moisture.

Fourth, the sowing depth is uncomfortable. Sowing too deep, long seedling emergence time, nutrient consumption, thin after emergence, especially short bud sheath varieties, seedlings can not be unearthed often encircled under the surface. If the sowing is too shallow, it is easy to dry the topsoil and lose water, and the whole seedling can not be produced.

The appropriate sowing depth is determined according to the soil quality, moisture and grain size, generally 5 6cm is appropriate. If the soil texture is heavy and the moisture is good, it can be appropriately shallow; If the soil texture is loose and easy to dry sandy soil, it can be appropriately deeper, but generally not more than 10cm.

5. Improper fertilization. If the amount of bottom fertilizer is too much or the chemical fertilizer is too close to the seeds, it is easy to burn the seeds or seedlings with chemical fertilizers, resulting in lack of seedlings and broken ridges. If the summer sowing corn is sown with seed fertilizer, it is recommended to apply 60 kg of corn special compound fertilizer per mu.

When adjusting the seeder, the distance of seed fertilizer should be guaranteed to be 8 10.

6. Herbicide pesticide damage. There are mainly the following situations:

1. If the application is not in accordance with the instructions, the concentration is too high and the dosage is too high, which will cause pesticide damage; Spraying time is not right or the herbicide harmful to maize is applied before stubble, which will cause residual effects; Spraying herbicides that are harmful to corn on the edge of the seed field will form droplet drift.

2. Apply pesticides before rain, and heavy rain will wash away the liquid, which will cause loss of high terrain and accumulation of low terrain, resulting in pesticide damage.

3. The application interval is short, and when two pesticides are used in the same corn field, the short interval will also produce pesticide damage.

4. After spraying herbicides, the pesticides and equipment are not cleaned in time, and the chain reaction of pesticides affects the emergence of seedlings.

5. The waste herbicide bottles (bags) are not properly destroyed, and they are thrown in the ditch and pond, and the water in the ditch and pond will be harmful if the water in the ditch or pond is used.

The moisture is not good

Before April 10th, there was a light rain in our local area, and some villagers took a pickaxe and dug the ground a few times, thinking that the rain was moderate, and the temperature was gradually rising, thinking that it was a timely rain, so they planted corn. But because there was no snow one winter,Underground pest damage. Underground pests such as mole crickets and ground tigers will feed on corn seeds, which can easily lead to corn seedlings and ridge breakage.

At the same time, when underground pests move in the soil, they will create holes in the soil, and these holes can easily separate the roots of seedlings from the soil.

<> precautions: According to the weather forecast, ** the weather conditions in the next 15 days, only 15 days when the average temperature is above 10 per day can be sown, you can ensure that the whole seedling can be sown. In the selection of corn seeds, if we buy fake and shoddy seeds, old seeds in the next year or regular seeds will lead to lack of seedlings and broken ridges after sowing.

Counterfeit seeds.

Due to the fact that the selected maize varieties are not adapted to the local natural conditions and the quality of the varieties is not high, in the process of cultivation, the seed maturity is reduced due to the influence of environmental conditions, resulting in the decline of seed vigor and low germination rate. The low germination rate of seeds causes the seeds to germinate and emerge not quickly, and with the increasing precision sowing area, the requirements for seed quality are becoming more and more difficult. The seed germination rate is low, the germination potential is low, and there are many seeds of seedlings and insects, resulting in low seedling emergence rate after sowing, poor germination and seedling emergence, and poor uniformity.

The seed germination potential and germination rate were low. The low germination potential of seeds causes the seeds to germinate and emerge not quickly, the uniformity is poor, and the vigor is low. The low germination rate and low seedling emergence rate after sowing will inevitably cause lack of seedlings and broken ridges in the field.

Now the seeds are stirred and sown with seed coating agent, which can prevent insects, rodents, and birds. The emergence rate is guaranteed, and the yield can only be improved when the seedlings are raised. Seed issues.

After purchasing the seeds, the small seeds with insect eyes are picked out and the seeds are dried for an hour or two on a sunny day. This is conducive to the good germination of seeds and can also ensure the high-quality growth of seeds.

The main reason is that the local soil quality is not good. Corn is a crop that is very dependent on soil quality. If this year's soil quality is poor or the acidity and alkalinity are too high, it will affect the yield of corn and the lack of seedlings and ridges.

The reason for the uneven land preparation: most of the land used in my village this year is the rotary plough of the land, I don't know what the reason, the cultivated land is uneven, so that when the artificial land is cultivated, the chuckle is high and low, and when the front wheel of the dart is high, the seeder behind is naturally deep; And when the front wheel is low, the seeder is shallow. As a result, the corn planted is of different depths, resulting in incomplete seedlings.

After cultivating the land, the land is manually leveled, and the corn planted is full of seedlings. It can be seen that uneven land preparation is the second reason for the lack of seedlings and broken ridges. Therefore, before sowing, even if the land is intensively cultivated, it needs to be leveled.

If the temperature is too low, it may affect the emergence rate of seeds, which will directly lead to low seedling emergence rate in the field, and some soil nutrients are insufficient, if there is soil compaction, it will also make it difficult for corn seeds to emerge. That may be a critical problem, such as the use of certain pesticides, beyond a certain concentration will cause pesticide damage, at this time it will be found that the growth of corn is limited, and some pests and diseases may also cause corn seedlings to die, resulting in ridge breakage. Therefore, we should find the specific reasons for this situation and then effectively solve it according to the specific reasons, when planting corn seeds, choose disease-resistant and drought-resistant varieties as much as possible, and at the same time let the soil have enough nutrients, and usually water in time to strengthen scientific field management.

In the process of planting corn must do a good job of water and fertilizer management, for some arid corn land to irrigate and water in a timely manner, to ensure that there is sufficient water for corn growth, if there is more rainfall, it is best to do a good job of draining the land, not to spray fertilizer in time, so as to ensure that corn is able to grow and recover enough. If there are pests and diseases, spray insecticides in time, but be sure to pay attention to the concentration and never overspray.

Normal sowing rate when the depth of 3 5 cm can be, of course, different soil properties may have some differences, so in planting may be different, so it is necessary to sow according to the nature of the soil depth, only to determine that the soil is moderate in the humidity is suitable for planting corn seedlings but also to ensure that the emergence rate is very good. When sowing corn, it is also necessary to ensure that the low temperature at that time can reach more than 12, especially during the planting of spring corn, the higher the ground temperature, the better, otherwise it is easy to make corn seedlings.

Finally, in the process of planting corn, it is necessary to manage it in a scientific way, so as to ensure the increase in corn yield.

It may be that the depth of the sowing is inconsistent, it may be that the quality of the land is very poor, sometimes it is not fertile, or it may be that there are many dry weather. Field management must be carried out carefully, first of all, land preparation, to increase the air permeability of the soil, and then the appropriate amount of base fertilizer.

It may be that the depth of sowing is different, the quality of the land is relatively poor, the germination rate of seeds is relatively low, the air permeability of the soil is relatively poor, the temperature is relatively high, and the cultivation management is not in place will lead to the lack of seedlings. Revaccination is an option.

Malnutrition, lack of hydration. The temperature is not enough, the nutrients of the soil are missing, and there are some diseases. The soil can be disinfected and sterilized, so that the state of the corn can be improved.

When it rains, the moisture level is exactly the same as the corn type, and the bottom is dry. In this case, the plant is a little shallow, barely germinating, deep, rotten, or rotten after germination. Although some villages did not have enough humidity after the rain, they watered the ditches and planted them, but because of boredom, they rushed to plant corn without waiting for the soil to be loose.

In one piece of land, there are saplings on slightly higher ground, and there are corn saplings lying down on lower ground, and some do not germinate at all.

1. Land preparation. 1) Spring maize field: do not carry out autumn deep ploughing, the spring ploughing of the following year is late, the soil ripening time is short, and the temperature rises quickly in spring, and the wind is windy and the moisture is serious, which affects the sowing and seedling.

If it is planted on dry land, without raking, the soil will be large and uneven, which will increase the degree of wind and moisture and affect the emergence of seedlings.

2) Summer maize field: the growth time of summer maize is limited, and the time of three summers: summer harvest, summer management and summer sowing is urgent. If you do not gain time to grab time and moisture, extensive sowing will also cause lack of seedlings and broken ridges. 

2. Spring corn is sown early.

The sowing date of spring maize is affected by factors such as ground temperature, soil moisture content, planting system and variety characteristics, and the sowing date is different in different regions. However, within the range of the suitable local sowing date, the word "early" should be used as the prefix. Appropriate early sowing can relatively prolong the growth period of maize, and the plant has more sufficient growth time to produce and accumulate more organic nutrients.

However, it is not unprincipled early sowing, too early sowing will cause the seeds to germinate slowly due to low ground temperature, or weak seedlings, and the plants are susceptible to disease or the phenomenon of powder seed rot, forming a lack of seedlings and broken ridges.

When there is a lack of seedlings and broken ridges of maize, it is necessary to judge whether to replant according to the degree of seedling shortage, time and climatic conditions and resource cost.

1. The degree of seedling deficiency.

The severity of the absence should be considered. If the lack of seedlings is only localized or small, while other plants are growing normally, then replanting may not be necessary. However, if the lack of seedlings is widespread and large, which seriously affects the overall growth of the corn field, then replanting may be necessary.

2. Time and climatic conditions.

The timing of replanting is also important. If the lack of seedlings is detected early, and there is still enough growing season remaining, there is time for replanting and waiting for the new seedlings to catch up. In addition, if the current weather conditions are suitable for the growth of corn, such as moderate temperature, moist soil, etc., then the success rate of replanting may be higher.

3. Resource and cost considerations.

Revaccination requires an investment of additional manpower, time, and resources. Consideration needs to be given to whether there are sufficient resources and capacity to carry out replanting operations, and whether the cost of replanting exceeds the expected returns.

Tips for replanting corn seedlings:

1. Select appropriate seedlings: try to choose seedlings with similar varieties, ages and growth states to the original corn seedlings. This ensures that the replanted seedlings are adapted to their original environment and are consistent with the other plants.

2. Prepare suitable soil for Chunzhou: Before replanting, ensure that the soil in the replanting area is suitable and well prepared. Loose, fertile, nutrient-rich soil helps new seedlings grow. If needed, the right amount of organic fertilizer can be applied to provide additional nutrients.

3. Replanting in a timely manner: choose suitable weather and soil moisture for replanting. In general, replanting is best done when the weather is warm and humid. Make sure there is steady rainfall or irrigation to keep the soil moist for a few days after replanting.

4. Control the depth of replanting: ensure that the seedlings are inserted into the soil at a moderate depth. In general, the depth of the soil should be similar to that of the original plant to ensure that the new seedlings can obtain sufficient water and nutrients.

5. Pay attention to the distance between plants: when replanting, try to keep the distance between plants even. This avoids overly dense or overly thin plant arrangements and promotes the growth and development of seedlings.

6. Give appropriate care: After replanting, continue to give appropriate care to the new seedlings. Including timely watering, soil loosening, weeding, etc. At the same time, regularly check the growth of seedlings and take timely measures to solve any problems that may arise.

For the phenomenon of no germination seedlings, many farmers have more or less, friends will understand that germination is seedling, in fact, it is not, seedlings are not necessarily seedlings must be germination caused by the phenomenon of many reasons, everyone is looking for their own actual situation and reasons, to avoid early attention when planting seedlings this year. Ridge soil drought problem: corn transplanting, need a certain Hualien feeling, corn seedling rate Hualien love and a lot of relationship, Hualien love on it, a week after transplanting seedlings foot rough grandson basically emerge seedlings, Hualien is not good, the field is dry, a seedling time is extended relatively, two people seedling rate declined.

For the case of severe drought, the soil is in a "firm" state, when the corn germinates, a certain amount of water required, due to insufficient moisture and growth, not only weak and dry soil, it is difficult for the soil on the surface of the soil to grow a triangular hat, if there is no germination seedlings, we recommend that when planting seedlings, water in advance, after completing watering, and so on a few days before planting. When corn transplanting, if mechanical transplanting is used, the good point is that the depth of machine transplanting should be fixed in advance, even if there is an error, it is not wrong, but if manual transplanting is used, it is not necessary to push back most of it under the control of force, it may be that the transplanting is very deep, especially when most of the holes are dug this is just the "experience" of the foundation stool limb.

Post-suppression problem: Whether corn is sown mechanically or manually, it is recommended to carry out proper suppression after **, which is conducive to the normal growth of corn. For example, after manual sowing, the foot pedal twice, and when the mechanical sowing is carried out, the machine pulls the press to suppress it properly.

However, in the process of suppression, if it is too suppressed, the corn will not germinate and will not sprout. As the saying goes, because the soil is too strong, corn does not have the "strength" to sprout even if it sprouts. In addition, there are also herbicide-induced pesticide damages.

For example, the pesticide damage caused by herbicides in the previous crop, the pesticide damage caused by the sealing herbicide in this crop, etc. If the planting area is small, use human hands to break up the soil on the corn sprout chain and use human hands to "sprout". If the planting area is large or you don't like to be grasped by human hands, you can replenish the seedlings according to the condition of the field, and in severe cases, destroy the direct inoculation and re-sow the seeds.