What should be noted when growing celery?
What should be noted when growing celery? There are the following technical points for growing celery: Sowing methods The commonly used sowing methods include dry seed direct sowing and seed soaking and sprouting before sowing. The dry seed direct sowing method is simple, and the seed sprouts are less likely to be damaged under adverse environmental conditions, but emergence is slow; with seed soaking and sprouting before sowing, emergence is faster and the seedlings are uniform. Before sowing, the seedbed should first...
What should be noted when growing celery?
There are the following technical points for growing celery:
Sowing methods The commonly used sowing methods include dry seed direct sowing and seed soaking and sprouting before sowing. The dry seed direct sowing method is simple, and the seed sprouts are less likely to be damaged under adverse environmental conditions, but emergence is slow; with seed soaking and sprouting before sowing, emergence is faster and the seedlings are uniform. Before sowing, water the seedbed thoroughly first, and after the water seeps in, cover with a layer of fine soil. Mix the celery seeds with fine sand evenly and broadcast them on the seedbed surface, then cover with sterilized fine soil 0.5 cm thick. Too thick a soil cover makes emergence difficult, while too thin a soil cover leaves the seeds exposed and with insufficient moisture, making germination difficult. From sowing to emergence, the soil should be kept sufficiently moist, which is conducive to emergence and uniform seedlings. In summer, when the midday temperature is too high, sowing should be done after 4 p.m. or on a cloudy day. After sowing, take care to keep the soil moist, and water frequently with a small amount of water. Excessive watering will cause the soil to crust, and the seedlings will not be able to come out. For autumn sowing, a shade net should also be added over the seedbed surface, and if the temperature is too high, it should also be added over the top canopy.
Seedling stage management From sowing to emergence, shading measures should be taken to both avoid direct sunlight and prevent rain erosion. The method is to insert small bamboo arches on the seedbed surface after sowing and cover them with a shade net or rice straw. If only a shade net is used, it is best to use more than 2 layers. Experiments have shown that rice straw results in faster emergence than a shade net. After the young seedlings emerge completely, the shade material on the seedbed surface should be removed promptly and gradually. After the seedlings emerge completely, the seedbed surface should not be too wet, to prevent the young seedlings from growing leggy. When the young seedlings reach 1 leaf and 1 heart, weed once. When the young seedlings have 2-3 leaves, keep the soil surface alternating between dry and wet when watering, and carry out seedling hardening to cultivate strong seedlings, so that the young seedlings grow as uniformly as possible. If there is a rainstorm, drain the accumulated water in the seedbed in time to prevent root rot and death of the seedlings or seedling rot. Celery likes moisture, and throughout the seedling stage it should be watered frequently with a small amount of water. In the high-temperature season, watering is generally done in the evening, following the principle of keeping the soil alternately wet and dry, and maintaining moist soil conditions.
Transplanting The transplanting time can be chosen according to local climatic characteristics and the growth of the seedlings. When the plant height is 15-20 cm, there are 4-6 true leaves, the stem diameter is 0.5 cm, and the soil temperature is suitable, transplanting can be carried out. Row and plant spacing vary depending on the variety and local cultivation habits. Generally, the row and plant spacing for western celery is preferably 15 cm x 25 cm square, and for large-stalk western celery the row and plant spacing is 35 cm x 30 cm. The specific transplanting density should be based on local climate, soil conditions and cultivation habits. Water the seedbed one day before transplanting. When lifting the seedlings, dig them up with the roots, shake off the soil, and discard diseased and weak seedlings. When planting seedlings, large and small seedlings should be graded, and seedlings of the same size should be planted together. The planting depth should be based on the depth at which the seedlings were planted in the seedling bed. Be careful not to cover the heart leaves, which would affect growth.
Field management After transplanting, adopt management measures of controlling in the early stage and promoting in the later stage. After transplanting, keep the soil moist, and water or drain in time to help the seedlings recover. After the seedlings have recovered, watering should be controlled, and intertillage, loosening the soil and weeding should be carried out for seedling hardening to promote root growth and lay the foundation for the plants' later growth. After seedling hardening, the plant root system is well developed and its absorption capacity is enhanced. The leaves change from spreading growth to upright growth, commonly called the heart-standing stage. At this time, the outer leaves no longer increase, the heart leaves begin to develop, and the plant begins to enter the stage of enlargement and filling. At this stage, special attention should be paid to watering to ensure water supply, and nitrogen fertilizer and potassium fertilizer should be applied as topdressing to promote heart leaf growth and plant enlargement, which is the key link for increasing yield. Therefore, immediately after seedling hardening ends, apply quick-acting nitrogen fertilizer as topdressing, or nitrogen fertilizer together with decomposed organic fertilizer may be used. For the first topdressing, apply 20 kg of urea per mu. After about 10 days, carry out the second topdressing, and with watering, apply about 900 kg of human excrement and urine fertilizer per mu. After another half month, apply urea as topdressing once more. During topdressing, water in time according to the weather and keep the soil moist regularly. In the middle and late stages, in addition to nitrogen, phosphorus and potassium fertilizers should also be added. In addition, attention should be paid to the supply of calcium and boron elements.
To promote celery growth and bring it to market earlier, gibberellin (920) can be sprayed on the leaves before harvest.
More celery growing techniques