Planting technology of cabbage in greenhouse

Cabbage is a common vegetable, which is rich in fiber and has the function of strengthening the body's immune system. At present, in addition to outdoor cultivation of cabbage, greenhouse planting is also a common cultivation technique. Now let's take a look at the cabbage planting technology in the greenhouse.

1. Soil preparation and fertilization

Before planting cabbage in greenhouse, it is necessary to apply sufficient base fertilizer, mainly mature organic fertilizer, combined with nitrogen, phosphorus and potassium fertilizer, to ensure sufficient nutrition and strong growth of cabbage. Combined with the application of appropriate amount of calcium fertilizer, the stress resistance of plants can be improved and dry heartburn can be prevented.

2. Colonization

Cabbage in greenhouse is usually planted in late March. If the cultivation time is too late, the advantages of protected cultivation will not be reflected and higher economic benefits can not be achieved. The planting density is not easy to be too large, generally between 2500 and 2800 per mu, but it will affect the yield. Customization is to choose sunny weather with higher temperature, and pour a small amount of planting water after planting.

3. Seedling stage management

Cabbage is a semi-low-temperature-tolerant vegetable, which needs a higher temperature when planting slow seedlings, and the temperature in the greenhouse should be controlled between 25-28 ℃ in the daytime and not less than 10 ℃ at night, so as to facilitate the rapid growth of cabbage roots.

After the plant entered the squatting seedling stage, the temperature should be properly lowered, the amount of water should be kept at 20: 25 ℃ during the day, and the new high fat film should be sprayed on the leaves to protect the plant, isolate the pathogen infection and promote the seedling to grow well.

Cabbage has a great demand for phosphorus, potassium fertilizer and water when it enters the heading stage, so it should be timely watering and topdressing, spraying vegetable Zhuangjianling on the leaf surface, improving the ability of absorbing water and fertilizer, and promoting the thickening of the leaf surface, the stout rhizome and the good growth of the plant. The soil should be dry and wet and should not be flooded. According to the increase of external temperature, the air discharge is gradually increased, and the maximum is not more than 28 ℃ in daytime.

4. prevention and control of diseases and insect pests

During the growth of cabbage in greenhouse, downy mildew and black rot are easy to occur. Disinfectant should be sprayed timely and tree protection generals should be used for disinfection and sterilization, so as to exterminate the virus in the germination stage, improve cabbage resistance and immune positive energy, and reduce the probability of bacteria damage.

5. Harvest

The harvest time of cabbage in greenhouse is generally at the end of April and early May. When the top of the leaf ball of cabbage is flattened and the leaf ball is tight, it can be harvested. Precocious varieties generally have a net weight of 1-1.5 kg per ball. Two or three old leaves are retained in the lower part of the bulb during harvest to protect the bulb, prevent extrusion and mechanical damage during transportation, and improve the commerciality of the bulb.

When growing cabbage in greenhouse, attention should be paid to the control of temperature and humidity in the greenhouse, as well as to maintain good ventilation. Generally speaking, it is relatively simple, and the market prospect is also good, interested farmers can give it a try.