Detailed Explanation of the Key Techniques for Peanut Crown Clearing and Seedling Hardening

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

1. The importance of crown clearing

It can promote strong growth of the first and second pairs of branches of the seedling, with short and sturdy internodes, and encourage early development of secondary branches. Clearing the crown promptly after peanut emergence can expose the stem base of the seedling above the ground, allowing it to contact sunlight earlier, changing the damp and cold environment at the peanut stem base, and enabling its 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 pests and diseases. At the same time, it can also reduce weed damage, and after crown clearing, the number of aphids at the peanut stem base will significantly decrease.

2. Timing of crown clearing

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

3. Depth of crown clearing

The depth of crown clearing should also be noted; it should not be too deep or too shallow. If too shallow, the cotyledons will not be exposed above the soil surface, and the lateral branches and stem base will still be buried in the soil, failing to achieve the purpose of crown clearing; if too deep, it will expose the hypocotyl of the seedling, very easily causing the seedling to lodge, which is not conducive to normal growth and development of the seedling. 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 seedling and expose the cotyledons.

4. Timing of seedling hardening

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

The above is an introduction to peanut crown clearing and seedling hardening techniques. We hope it can help you. To learn more related knowledge, please stay tuned to us.