Winter shed celery management

As a result of easy management and high yield, greenhouse celery is popular among farmers. Management of winter greenhouse celery should pay attention to the following points:

1. Seedling stage: The celery seed is small and the top soil is small. In order to ensure the emergence rate of celery, blending about 10% of bio-organic fertilizer in the seedbed nutrient soil can improve the physicochemical properties and biological characteristics of the nutrient soil, reduce the bacteria infection, and promote rooting and emergence of celery. When celery top soil, lightly watered once, 1 - 2 days can be Qimiao. After the soil is kept moist, the principle of pouring less is used. When the seedling height is 5-6cm, the humic acid water-soluble fertilizer is applied once with water, 1 to 2kg per mu, and when the seedlings grow to 10cm high, the fertilizer is applied once again, and the amount of mu is 2-3kg. Homophobic humic acid foliar fertilizer 800 times, strengthen plant nutrition, promote seedling growth, prevent the emergence of sick and weak seedlings.

2. Colonization, slow seedling period After the planting to the seedling stage, it is necessary to water and light water to keep the soil moist. When the new leaves grow and the new roots appear, appropriate cultivators and root cuttings will promote new root proliferation, root undershoot, and heart and leaf differentiation. Late seedlings, combined with watering, with humic acid fertilizer, accelerated new roots

3. Nutritional growth period

The vegetative growth period of celery is a critical period for the formation of yield. After the seedlings are finished, they must concentrate the fertilizer and promote the vegetative growth of the plants. The absorption of celery is relatively weak, but its fertility is strong. Generally, the amount of fertilizer is much more than 2-3 times of its absorption. The root system can absorb fertilizers only at high soil concentration. The edible organ of celery is a vegetative body, and the amount of fertilizer it needs is gradually increased as its growth period increases. Management in the middle and later stages is the last link to capture the high yield and quality of celery, and management should pay attention to the management of temperature and fertilizer. (a) temperature, celery is low-temperature vegetables, the lowest energy -7 - 10 °C low temperature, but its suitable growth temperature is 15 - 20 °C, so we should grasp the principle of rather low temperature management. As far as the current greenhouse is concerned, the daytime temperature is appropriately higher and can promote assimilation. It is beneficial to the increase of leaf blade and petiole elongation. It is appropriately lower at night and is conducive to leaf weight gain and petiole hypertrophy. Rise to 22 - 25 °C and then release the air, the temperature dropped to 20 - 22 °C off the outlet. When there is bad weather such as cloudy days, or when the humidity in the greenhouse is too high, the air is discharged for 30 minutes at noon for dehumidification. (B) fertilizer, celery belongs to shallow root, solid leaf vegetables, so the growth phase of nitrogen fertilizer, phosphorus and potassium supplement. Phosphate fertilizers have poor mobility in the soil. Therefore, phosphorus fertilizers should be applied at the end of the previous period and should not be applied later. Potash fertilizer can promote stout and fullness of the petiole, which has a great influence on the yield increase, and it can also make the celery glossy and reduce the fiber, thus improving the quality of celery, especially the rational application of potash fertilizer is very important. This period top dressing with potassium nitrate, for example, 667m2 dosage of 4 - 5kg is appropriate, with particular attention can not be too much, because excessive potassium will inhibit the absorption of boron and calcium, calcium deficiency is easy to induce dry heart disease, boron deficiency can make petiole cracking, Black heart disease and heart rot occur.

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