First, spring dew vegetables Including open winter vegetables and spring open field or planting vegetables. 1. Overwintering vegetables in the green period management The overwintering vegetables in the open field mainly include garlic, onion and spinach. Management should pay attention to timely cultivating and rowing, and preserving the roots in advance to promote root growth. Remove weeds from vegetable fields early in the middle and late stages of growth to prevent weeds and vegetables from competing for nutrients. At the same time, according to the weather conditions, from the end of March to the beginning of April, timely topdressing, watering, seedlings and trees, to promote early return to green, morning market. 2. Colonization of open vegetables The planting period is generally 10-20 days later than the arch shed. The broccoli vegetables are planted in late March and early April, and the melons and solanaceous vegetables are planted in the middle and late April after the frost; the fast-growing vegetables with strong cold resistance such as rapeseed , Moss, Chinese cabbage, Geba, etc., can be broadcast live in Daejeon in the middle and late March. Infertile seedlings such as beans, melons, and solanaceous vegetables can also be broadcast live in the field in late April. Before planting, it is necessary to make good ground and apply enough base fertilizer. The planting is generally carried out on sunny days in the morning, and watering should be done in time after planting the seedlings. Second, agricultural papers, summer and autumn vegetables The seedling and planting time of the summer vegetables should be postponed according to the production needs or the listing period. The management should be based on high temperature, disease, insects and grass damage, such as celery, rape, cabbage, coriander, spinach, first hunting, etc. Green leafy vegetables should be covered with shade nets. The sowing period of autumn open vegetables should be based on different vegetable types. From the frosty harvest period, such as melon vegetables should be pushed forward 85-90 days before the frost. In management, we should pay attention to preventing pests and diseases in the early stage. Third, fertilizer management It should be carried out according to the principle of light weight before and after, when the vegetables in the open field should be watered in time to promote the slow seedlings. After the seedlings are slowed down, no water will be applied, no topdressing will be carried out, and seedlings will be promoted to promote root development. In order to prevent the seedlings from growing, the watering and fertilization should be properly controlled in the early stage. When the first fruit (melon) of the solanaceous vegetables, such as melons, is sitting, the stems or leaves of the leafy vegetables start to grow or expand rapidly, and then watering. Fertilize. Fourth, pest and disease pollution-free comprehensive prevention and treatment Spring is a frequent and prone season for pests and diseases. After mid-to-late April, as the temperature gradually increases, pests and diseases begin to occur. Firstly, we will strengthen the forecasting and forecasting of vegetable pests and diseases in a timely manner, implement the policy of “prevention first, comprehensive prevention and controlâ€, and adopt technologies such as agriculture, ecology, physics, and chemical control to ensure that pesticide residues do not exceed the standards and achieve high yield and quality. Vigorously promote the production technology of pollution-free vegetables, and strictly prohibit the use of high-toxicity, high-residue or pesticides with three-way (carcinogenic, teratogenic, mutagenic) effects prohibited by the state, and promote the use of high-efficiency, low-toxic, low-residue pesticides, such as Insect, anti-carbophos, phoxim, lesburn, pyrethroid vinegar pesticides, multi-bacteria, thiophanate, etc. After the drug is administered, it must be harvested, sold, or consumed after reaching a safe interval. Disclaimer: Some articles on this website are transferred from the Internet. If legal rights of third parties are involved, please inform this website. phone API Products Shandong YingLang Chemical Co.,Ltd , https://www.sdylhgtrade.com