Causes and remedial methods of yellow wheat seedlings

It is now the season of wheat sowing and emergence, but in this slightly inappropriate party, there is a phenomenon of wheat seedling yellow or seedling death, but after the emergence of seedling yellow phenomenon, farmers are not in a hurry, first of all to understand the causes of their seedling yellow. Let's take a look at the causes and remedies of yellow wheat seedlings with Xiaobian.

1. Element-deficient seedling yellow

In wheat seedling stage, if lack of nutrients, wheat will yellowing, the most common ones are nitrogen deficiency, phosphorus deficiency and potassium deficiency, in which nitrogen deficiency will make the seedlings show short and weak plants, few and weak tillers, green and yellow leaves of wheat seedlings, and in serious cases, chlorophyll decreases or disappears, resulting in withering of leaf tips and yellowing of old leaves in the lower part of leaves. On the other hand, phosphorus deficiency will lead to less secondary rooting, less tillers, dark green leaves and yellow leaf tips, and lack of timely remediation will lead to fewer spikelets and less full grains. Potassium deficiency usually starts at the tip of the old leaf, then extends downward along the vein, and the seedlings fall to the ground in the later stage.

Remedy: before planting, we must apply sufficient base fertilizer to ensure the growth and development of seedlings, and apply fertilizer in time when there is a lack of elements, so that the seedlings can recover as soon as possible.

2. Sowing too deep

During sowing, because the mechanical modulation is unreasonable, the sowing is too deep, and the underground stem grows too long, and the wheat seedlings consume more nutrients of the seeds when unearthed, which will lead to the phenomenon of slender leaves and poor root development after being unearthed. This leads to thin and yellowing seedling growth.

Remedy: part of the soil on the seeds can be removed to make the cover soil thinner, and then collected and ploughed to improve soil permeability, promote lateral root germination of seedlings and make wheat seedlings become stronger.

3. Overgrowth and drought

In the wheat fields with early sowing and large sowing quantity, the growth of wheat seedlings is often too dense, resulting in poor permeability, weak development and yellowing. In addition, if the field is too dry, the secondary roots of the seedlings are few, the tillering is difficult, and the leaves turn yellow and gradually dry up due to lack of water.

Remedial measures: appropriate artificial thinning of wheat seedlings should be carried out to increase the transmittance and ventilation of the wheat field, slow down the growth rate, and at the same time deeply plough and cut roots, reduce the absorption of water and fertilizer, and control the increase of tillers and excessive growth. On the other hand, the dry land should be watered in time to promote the normal growth of wheat seedlings.

4. Drug damage and fertilizer damage

Root rot is common in the seedling stage of wheat seedlings, which can cause the wheat seedlings to turn yellow, and seriously cause the wheat seedlings to die and the roots to rot. On the other hand, wheat seedlings do not use mature organic fertilizer when fertilizing, or seedlings and seeds are burned by direct contact with fertilizer, resulting in yellowing of leaves or leaf tips.

Remedy: 70% methyl topiramate wettable powder 800-1000 times liquid can be used to prevent and control root rot, and when fertilizer damage occurs, it can be watered and diluted in time to alleviate fertilizer damage.

The above is the introduction of the causes and remedies of wheat seedling yellow. I hope I can help you. If you want to know more about it, please follow us.