Growth cycle of Chinese chive

The growth cycle of leek seed is three to four months, and when it grows to about 15CM, harvesting is the most suitable. Among them, the growth speed of leek is related to root water, fertilizer, light, temperature, humidity and density.

1. Germination period

The germination period is from the beginning of seed germination to the time when the bud protrudes and grows the first true leaf. The whole process of germination and unearthing of general varieties takes about 10 days. Some seeds with large mouth or deep sowing germinate slowly. When planted in the field, the emergence period can be as long as 12-15 days, and some even longer. The seeds of leek are small, the seed coat is hard, the water absorption is poor, the nutrients stored in the seeds are few, and the unearthed is slow. When the buds are unearthed, the upper part is folded, first unearthed in an arch by the top soil at the junction of rice, so it is called "top nose". When all the unearthed cotyledons are straight, they are called "straight hooks". In this period, if the soil moisture is insufficient, the seedlings are easy to die, so, in order to improve the sowing quality, the soil should be carefully prepared before sowing, the soil should not be too deep, and the soil should be kept moist, so that the emergence of seedlings can be ensured.

two。 Seedling stage

From the appearance of the first true leaf to the ability of ramet is the seedling stage. A total of 8-10 leaves and 10-15 roots were grown in this period. It takes about 70-80 days for general varieties and about 60 days for fast-growing varieties. In this period, the aboveground part of Chinese chive grew relatively slowly, mainly by root system. In management, we should combine watering and fertilizing once to promote the healthy growth of seedlings, and strengthen weeding to prevent the breeding of weeds, so as to avoid weeds affecting the normal growth of seedlings. If seedlings are used for transplanting, they can be planted when the height of the seedlings reaches 18-20 cm.

3. Peak vegetative growth period

The ramet began to occur when the stem disk growth point had the ramet ability, that is, it entered the peak period of vegetative growth. During the growing period, the ramet times and ramet number in one year are closely related to the variety characteristics and cultivation conditions. In general, narrow-leaf varieties have strong ramification ability, which can divide 4-5 times a year when nutrition is sufficient, and divide from one plant to more than 10 individual plants. The ramet ability of broad-leaf leek is poor, generally 2-3 times a year. When the plant is dense to a certain extent, the accumulation of photosynthetic matter per plant is less, and when the nutrition is insufficient, ramet can not or rarely occur.

In the period of exuberant nutrition, leek will complete the preparation for flower bud differentiation. Flower bud differentiation requires that the plant can bolt and blossom after a certain period of low temperature and long sunshine. Some leeks sown in early spring go through the stage of low temperature vernalization, and then through the long sunshine in summer, they can bolt and blossom in autumn; most of them go into dormancy in winter of the same year, and after low temperature vernalization in the spring of the second year, and long sunshine in summer, flower bud differentiation begins, enters the stage of reproductive growth, and bolts and blossoms in autumn. For leek with leaves as its product, bolting and flowering consumes a lot of nutrients, which is disadvantageous to the plant, and the bud should be removed before flowering.