Celery is cold and its seedlings are large in temperature, so that the planting period is less demanding and can be broadcast in the spring, autumn or summer, but the most appropriate long-term life is in the autumn, from early august to early october, when the weather is cool, the seeding is fast and the celery is suitable for growth. In order to increase the rate of land use, the following three points should be understood:
The selection of seedlings of celery is small and difficult to produce, and the bed should choose where the soil is ventilated and loose. Before seeding, the soil is tanned, a small amount of manure is applied to manure, covered with ash and then covered with grass. During self-sowning to seedlings, water is poured one or two times a day and damp。
2. When the shade is covered, the cover is removed in a timely manner and the shade is immediately placed to avoid strong light and showering of the seedlings. The sheds are normally 1 m - 1. 7 m high, covered with straw curtains or bamboo windows at 7 a. M. - 8 p. M. And removed at 5 p. M. - 6 p. M. You have to cover the curtains before the thunderstorm. As the seedlings grow up, increasing light time, and when the first leaf emerges, it is advisable to cover the curtains at 10 a. M. And to remove the curtains at 3 p. M. Or 4 p. M.; the curtains will only be added when the light is strong at noon, about 15 days before planting, the roofs will be removed and the seedlings will begin。
Thirdly, the increased management of seedlings is followed by the daily watering of water canteens to avoid the spilling of seedlings. Five to seven days after the seedling is produced, a small, decomposed manure is carried out once, and weeds are uprooted in time for the growth of the seedlings; and nitrogen fertilizers are followed up later, depending on the growth of the seedlings. Forty-50 days after the broadcast, the seedlings can continue to be planted in the field. (source: liu yunchuan, china weather service, 31 august 1998)
