Attention should be paid to planting cabbage in greenhouse

The main results are as follows: 1. 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. 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 at about 25: 28 ℃ in the daytime and not less than 10 ℃ at night in order 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.

3. 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 disinfected and sterilized in order to exterminate the virus in the germination stage, improve cabbage resistance and immune positive energy, and reduce the probability of bacteria damage.