Every summer, celery seedlings bring a lot of trouble to farmers. The characteristics of celery are cold, cold and heat-resistant. From June to July, it is high temperature, high humidity and glare. In high temperature, celery is difficult to germination. In addition, pests, especially mites and underground worms, are prone to deficiency. Miao, dead tree phenomenon.
Summer celery seedlings should master the following technical points:
First, pay attention to control the germination temperature. Due to the high temperature outside the summer, it is difficult to germination, which can be adapted to local conditions. The germination environment temperature is controlled at 15 to 20 degrees Celsius, and it can germinate after about 10 days.
Second, prevent continuous cropping or soil compaction. Continuous cropping or soil compaction is often caused by two reasons: on the one hand, the soil of the bed is not good; on the other hand, the bottom water is insufficient and the humus content is small. Therefore, it is necessary to choose a land with a loose soil, fertile soil and rich soil organic matter.
Third, scientific use of fertilizer. Excessive application of nitrogen fertilizer resulted in long seedlings, thin leaves and less roots. When the temperature is too high, the respiration of the seedlings is enhanced, and the nutrients consumed are many, and the weak seedlings are prone to occur, resulting in dead seedlings.
Fourth, sunshade and rain. The environment of high temperature, strong light and heavy rain in summer is not conducive to the emergence of celery, so it is necessary to protect against rain and seedlings.
Fifth, pay attention to the prevention and control of underground pests. In order to control underground pests such as cockroaches, the bran can be sautéed in the pan, add 90% trichlorfon powder and mix well to make a poison bait and sprinkle around the seedbed.
Sixth, strengthen seedling management. Generally, the seedbed temperature should be controlled at 15 °C-20 °C, the relative humidity of the soil should be kept at 85%, and 8-10 days can be used. After the seedlings, the first seedlings were planted. After 10 days, the second seedlings were planted. The seedlings were 1-1.5 cm apart. After one month, the third seedlings and the seedlings were 5 cm apart. The seedlings could be moved by 5 cm. Planting, watering after planting can effectively save seedlings. The seedling stage must maintain a moist soil and a suitable warm light environment.
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