The Latest Technical Method Tutorial for Clearing the Crown and Root-Exposure Seedling Hardening in Peanuts

Clearing the crown and root-exposure seedling hardening in peanuts is an advanced field management technique for peanuts. It is a technique used during crop cultivation to inhibit the growth of seedling stems and leaves and promote root development, which can make the plants grow robustly and improve their stress resistance and lodging resistance. So how is clearing the crown and root-exposure seedling hardening carried out? Let's take a look together.

1. The importance of clearing the crown

It can promote strong growth of the first and second pairs of branches of the seedlings, with short and sturdy internodes, and encourage early development of secondary branches. Clearing the crown in time after peanut emergence can expose the stem base of the seedlings above the ground, allowing them to contact sunlight earlier, changing the damp and cold environment at the peanut stem base, and enabling the stems and branches to grow early and quickly. It can also promote earlier differentiation of flower buds, laying the foundation for high yield; it can promote root growth and development, improve its drought and waterlogging tolerance, and enhance its resistance to diseases and insect pests. At the same time, it can also reduce weed damage, and after clearing the crown, the number of aphids at the peanut stem base will decrease significantly.

2. Timing of clearing the crown

Correctly grasping the timing of clearing the crown is key to achieving increased peanut yield. If the crown is cleared too early, the seedlings are tender, and after the soil is scraped away their resistance to the external environment is weak, the leaves are very likely to be scorched by sunlight, and root extension will also be affected; if the crown is cleared too late, it will lead to thin and weak lateral branches and overly long internodes at the stem base, affecting the effect of clearing the crown. The best time to clear the crown is after full emergence, following the order of sowing and emergence.

3. Depth of clearing the crown

The depth of clearing the crown should also be noted; it should not be too deep or too shallow. If too shallow, the cotyledons do not emerge above the soil surface, and the lateral branches and stem base remain buried in the soil, failing to achieve the purpose of clearing the crown; if too deep, the hypocotyl of the seedlings will be exposed, which can easily cause the seedlings to lodge and is not conducive to normal growth and development of the seedlings. Generally, after full emergence, use a large hoe to hoe deeply all over, then use a small hoe to scrape away the soil around the seedlings and expose the cotyledons.

4. Timing of root-exposure seedling hardening

After clearing the crown, carry out root-exposure seedling hardening for a period of time so that the seedlings can grow robustly and the secondary branches can develop earlier. The best time for root-exposure seedling hardening is 15-20 days after clearing the crown, when the internodes at the stem base of the seedlings have already changed from purple to green, and the secondary branches have also developed.

The above is an introduction to the technique of clearing the crown and root-exposure seedling hardening in peanuts. We hope it can help you. To learn more related knowledge, please stay tuned to us.