The main cause of wheat seedling death

The main cause of wheat seedling death

01. The quality of straw returned to the field in some plots is poor, not fully crushed, and scattered unevenly, some places are more, some places are less, if the roots of wheat seedlings are stuck on the straw, it is not conducive to the growth of wheat, resulting in weak roots , The seedlings are thin, and the wheat seedlings die.

02. The soil in some plots is loose. There is no suppression or the suppression is not firm after sowing. The seeds cannot be in close contact with the soil. After the wheat seedlings are unearthed, the root system leaks air, resulting in weak seedlings or death of wheat seedlings.

03. Some plots are sown too deep (not suppressed before sowing, it is easy to cause too deep sowing), the sowing depth reaches 6-10cm, and the wheat seedlings consume too much nutrients during the emergence process, resulting in weak seedlings after emergence, frost resistance, and anti-frost resistance. Disease and insect resistance are weak, resulting in the death of wheat seedlings. the

04. Encountering a sudden drop in temperature, the wheat seedlings grow vigorously at this time, the leaves are tender and juicy, and the ability to resist freezing is poor, resulting in frost damage. At present, some leaves are dry and dead. Deep sowing of weak seedlings, loose soil, and poorly suppressed plots are more dead. 05. Drought occurs in some plots, and the soil moisture is poor, which affects the growth of wheat seedlings, resulting in yellow seedlings, weak seedlings, and even death. the

06. During the growth period of the previous stubble corn, some plots of herbicides were sprayed too late or re-sprayed or the spraying dose was too large and the concentration was too high, resulting in herbicide residues and phytotoxicity, resulting in blackened and rotten roots, and heart leaves. Bend, death happens.

07. The harm of red spiders causes the leaves of wheat seedlings to turn white and lose chlorosis, and the growth of wheat seedlings is affected.

Responses  

01. For the plots where drought occurs, the quality of straw returning to the field is poor, or the soil is loose and compacted, it is necessary to water as soon as possible to fully consolidate the soil, restore wheat growth, and avoid more severe freezing damage in winter, and the plots with weak seedlings Before watering, 10 kg of urea per mu can be used to promote the growth and tillering of wheat seedlings.

The plots without irrigation conditions should be suppressed, the soil should be compacted, so that the root system of wheat seedlings can be in close contact with the soil, and the frost resistance ability of wheat should be enhanced. Pay attention to the effect of suppression.

02. For herbicide damage, plant growth regulators such as brassinolide should be sprayed to restore the growth of wheat seedlings; for red spiders, acaricides such as avermectin or bibenidaram can be sprayed