Broccoli needs a lot of water during the growing period, but there should be no water accumulation when watering, and the soil water content should be kept at 75%. The main fertilizer demand period of broccoli is the early growth stage and bolting stage, during which nitrogen, phosphorus and potassium fertilizer should be applied more, mainly nitrogen fertilizer. Intertillage weeding: Intertillage weeding is one of the key technical points in the planting process. Fertilization and weeding should be carried out at the same time during the growth of broccoli. The purpose of intertillage weeding is to improve the permeability of soil, so that broccoli can better absorb soil nutrients, so that broccoli can grow more vigorously. However, it should be noted that it is not suitable for intertillage after bank failure. Pest treatment: The main pests of broccoli are Astragalus membranaceus, Plutella xylostella, Pieris rapae and aphids. Drug treatment should be carried out in time after the occurrence of pests. This kind of pests can basically be treated with drugs such as 25% fast killing 2000 times solution and 700 times solution of chlorfenapyr. However, broccoli has strong disease resistance and generally has no pests and diseases.
Planting time Many people think that broccoli can only be planted for one season, but it is not. Broccoli can be planted in two seasons, March and July. Planting begins in mid-March and can be harvested in early June; If you plant in early July, you can harvest in mid-September. Because broccoli likes warm and cool weather, the harvest in March is usually better than in July. Broccoli planting method Land Broccoli does not require high soil quality, but prefers sandy soil, because it prefers permeable soil, and sandy soil will increase the yield of broccoli to a certain extent. The soil should be composted in advance, and no weeds can remain in the soil after cleaning. The location of the land is high, the drainage is convenient, and the soil is kept in a semi-humid state, which can enhance the permeability of the soil and make the soil slightly acidic.
Light temperature Broccoli requires high sunlight, and good direct sunlight can promote the compactness of the flower ball. However, if the temperature is too high, please shade the sun. Generally speaking, controlling the temperature at 25℃ is more suitable for the growth of broccoli. The direct exposure time is preferably controlled at about 6 hours. When the temperature exceeds 35℃, you should pay attention to heatstroke prevention and cooling, otherwise it is easy to burn broccoli. Fertilizer and water management Because broccoli grows rapidly, there are many requirements for fertilizer and water, which are generally divided into 3-4 times. After emergence, topdressing is needed once a week, and topdressing is needed for the second time after the flower heads grow out, and then the growth situation of the next two times needs to be seen. If it is not ideal, it will be twice, and if it is ideal, it will be fine once. The amount of water needed in the early stage is less, so attention should be paid to maintaining the wettability of the flower ball after growth. Generally speaking, it is best to pour water directly along the joint between the page and the root.