Potato seedling management points

Spring sowing potatoes in central and southern Hebei have emerged. The seedling period of potatoes generally refers to the emergence of seedlings from the seedlings, to 6-8 leaves, seedling height 15-20 cm, early maturing varieties lasted 15 days until the end of the mission. Some also call this period the early period of the seedlings, and send them after the mission to the later stage of the seedling period. The management of potato seedlings is described as follows:

1. Ventilation and ventilation The temperature has gradually increased in recent days. Daily 8-10 am in the greenhouse when the temperature reaches 18 °C above, to open the ventilation vents, so that the greenhouse temperature control within 25 °C; film potato has begun to emerge, the seedling period before 9 am daily inspection before , Membrane breakage in time to prevent roasting.

2. Pay attention to those who lack moisture when sowing, pay attention to observe the soil moisture under the membrane. If the humidity is not enough for the topsoil to dry, it may cause the seedlings to be burned if they have not been excavated. It is recommended that timely replenishment be done to facilitate seedling emergence.

3, watering top-fertilizer potato seedlings before the growth of the stems and leaves is not large, but the exhibition leaf speed. After entering the hair rooting stage, the growth of stems and leaves soared and began to form lateral branches. In order to meet the large demand for nutrients and moisture during the hair growth period, the trees are topped with water and fertilizer. General Mu topdressing ammonium bicarbonate 50-100 kg or urea 20-30 kg. The seedling stage is a period centered on the growth of stems and leaves, and is also a period for the formation of tubers and starch accumulation. The suitable temperature for seedling growth is 21°C, which requires sufficient light, suitable moisture and abundant nitrogen fertilizer supply. In the cultivation and management, early fertilizer and early watering are needed to promote the rapid growth of seedlings and the development of roots, which lays a good foundation for the harvest.

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