1. Germination seedling stage

From peanut sowing to 5% of seedlings unearthed, and the first real leaf is unfolded, which is the germination seedling stage. It takes 5-15 days to germinate, and the specific emergence time is related to the temperature. Spring sowing peanuts have a long emergence period, which may take 8-15 days, while summer sowing peanuts have a much shorter emergence period, which usually takes 5-1 days.

2. Seedling stage

The seedling stage is from 5% seed emergence to 5% first flower blooming. The seedling period is generally 2-35 days, and the specific time varies greatly due to varieties and planting seasons. The seedling period of spring sowing is generally 25-35 days, and that of summer sowing is 2-25 days. Some early-maturing summer sowing varieties even need only 2 days.

3. flowering needle stage

The flowering needle stage is from 5% of the plants to 5% of the plants with cockscomb-shaped young fruits. The flowering period is 15-35 days, which varies greatly according to the planting season and variety. The flowering period of spring-sown peanuts is 25-35 days, while that of summer-sown peanuts is 15-2 days, so the peanuts should be carefully maintained during the flowering period.

4. Pod-setting period

The pod-setting period is from 5% plants to 5% plants with full fruits. Pod setting period is generally 2-4 days, spring sowing is 3-4 days, and summer sowing is 2-3 days. The growth characteristics of this period are that a large number of fruit needles are buried in the soil to form young fruits or fruit cakes, and the vegetative growth reaches its peak, and the water consumption of water and fertilizer reaches its peak. It is necessary to ensure sufficient water and prevent dead seedlings and pests. External fertilization can prevent premature senility and promote pod development.

5, full fruit maturity

The full fruit maturity period is from 5% plants to most pods, which is referred to as full fruit period. The full fruit period of spring sowing peanuts is 4-5 days, and summer sowing peanuts is 3-4 days. The growth characteristic of this period is that the vegetative growth is declining, mainly reproductive growth, and the nodule stops nitrogen fixation. During this period, fertilizer can be applied outside the roots to prolong the functional period of leaves and improve the full fruit rate. Attention should be paid to timely harvesting to prevent fruit germination.