Prevention and treatment of bolting of celery

Celery belongs to Umbelliferae. There are two kinds of water celery and parsley, which have similar functions, and it is better to use them as medicine. Parsley has a strong aroma, also known as parsley. The fruit (or seed) of celery is small and has a plant-like flavor and can be used as a seasoning, especially in soups and pickles. Celery seeds contain about 20.3% essential oil, and the main components are C10H16 (limonene) and C15H24 (limonene). Root celery (A.G. Var. Rapaceum) having edible coarse roots, eaten raw or cooked as a dish.

According to modern scientific analysis, every 100 grams of celery contains 2.2 grams of protein, 0.3 grams of fat, 1.9 grams of sugars, 160 milligrams of calcium, 61 milligrams of phosphorus, 8.5 milligrams of iron, carotene and other B vitamins. Celery is rich in nutrition and contains more calcium, phosphorus, iron and provitamin A, vitamin C, vitamin P and so on. It has been used for both edible and medicinal purposes for a long time. Celery taste sweet and cool, with the effect of clearing stomach and removing phlegm, dispelling wind and regulating qi, refreshing mouth and mouth, refreshing eyes and reducing blood pressure. In addition, celery is rich in volatile aromatic axes, which can not only increase appetite and promote blood circulation, but also play a refreshing dietotherapy effect.

According to traditional Chinese medicine, celery is sweet and cool and has the effects of clearing heat, diuresis, reducing blood pressure, removing fat and so on. For medicinal use, decoction and drink or external application of tamping juice, it can assist in the treatment of early hypertension, hyperlipidemia, bronchitis, tuberculosis cough, headache, insomnia, menorrhagia, functional uterine bleeding, adverse urination, heat accumulation in lung and stomach, measles in children, gills and so on.

Prevention and treatment of bolting of celery

I) Scientific cultivation and management

In celery cultivation, increasing the temperature of celery seedling bed and avoiding the low temperature in vernalization stage is one of the effective measures to reduce the early bolting of celery. Now celery seedlings are in the cold winter, if the daytime temperature in the border is kept at 15 degrees Celsius to 20 degrees Celsius, and the night temperature is kept at 8 degrees Celsius to 10 degrees Celsius, it can be avoided to pass through the vernalization stage. In order to achieve this goal, the following measures are usually taken: appropriate late sowing. Raise seedlings late in order to avoid the cold season and raise seedlings when the temperature warms up, so as to ensure a higher temperature in the seedling bed. It can also be fully "baked" before sowing to raise the temperature in the sowing border. Build windproof barrier and cover thermal insulation cover to improve the performance of windproof and thermal insulation. Often clean and wipe the plastic film to make it have high transmittance. Seedling stage should be less watering, watering small water, so as not to reduce the ground temperature. After the growth of spring celery, most plants already have flowering stalks, the stems of flowers harvested earlier are shorter, and the later the harvest is, the longer the flowering stalks are. Therefore, it should be harvested in time so as not to reduce the quality of celery because the flower stalk is too long. The method of split leaf harvest can also prevent early bolting.

The main results are as follows: 1. Select the solid straw varieties which are strong in winter and not easy to bolting in advance.

2. Adopt new and full seeds. This kind of seed has strong growth potential and exuberant growth, and the early bolting is lighter. Seed collection should be strictly in accordance with the technical requirements of agronomic operation, and strictly prevent the use of early bolting plants to retain seeds, otherwise it will greatly reduce the winterness of varieties, cause quality degradation and aggravate the occurrence of early bolting.

3. When raising seedlings in winter and spring, all effective measures should be taken to avoid the low temperature below 8 ℃ ~ 10 ℃. The temperature should be above 8 ℃ ~ 12 ℃ at night and 15 ℃ ~ 20 ℃ during the day to avoid the vernalization stage of seedlings.

4. During the growing period, the management of water and fertilizer should be strengthened to ensure its normal growth and development, promote exuberant vegetative growth and inhibit reproductive growth. Prevent drought, less fertilizer, squatting seedlings and other environmental conditions.

5. Under the premise of strengthening management, timely spraying of growth hormone once every 10 days in the peak growth period, spraying 92 ○ of 20 mg / L for 2 times can promote vegetative growth and inhibit bolting and flowering.

6. Harvest early, do not harvest when bolting plants are old.

II) skillful use of gibberellin

Gibberellin can promote vegetative growth, increase yield, improve quality and slow down early bolting of celery. The commonly used concentration is 20 to 50PPm. Gibberellin should not be mixed with alkaline pesticides, and its application concentration should not be increased arbitrarily, otherwise celery will die or grow abnormally. The application time should be in the peak growth period of celery, spray once every 7 to 10 days, spray 2 to 3 times in a row, and stop spraying 15 days before harvest. Proper spraying can increase the yield of celery by more than 20%, and its petiole grows and its texture is crisp and tender.