1, variety selection
Choose a variety of heat-resistant, disease-resistant and commercial cabbages suitable for local high-temperature planting and consumption habits in summer.
2, soil treatment
Pakchoi has higher requirements on the soil. At the same time as the former crops are pulled in the clearing of the clearing, the soil should be disinfected with lime and fungi if the crops are damaged and the disease occurs at the end of harvesting. If the secondary salinization of the soil in the shed is serious, apply the large water flooding to wash the salt. Before the irrigation, the soil around the greenhouse will be built to make it rise above the soil surface. When the water is poured, the water will be immersed in the soil surface, such as the shed film is not removed. The whole greenhouse can be sealed for 7 days, and some of the bacteria in the soil can be killed by the high temperature in the shed. When conditions permit, the calcium cyanamide (lime nitrogen) can be used in combination to disinfect, the effect will be better, and the soil is soaked for several hours. After draining the water, the surface soil can be desalted 50-60%. The soil with heavy soil is changed to vegetable land, and soil improvement must be carried out first. 1-5 months before planting leafy vegetables, select the decomposed organic fertilizer or commercial organic fertilizer that meets the pollution-free standard such as pig manure, duck manure, chicken manure, etc., according to the usage of 4000-5000 kg per mu, adopt deep-draw method. Apply evenly into the soil layer.
3, soil preparation, application of base fertilizer, mesh coating
The soil is most suitable for sandy loam and loam, and is close to the water source for irrigation. Apply 1000-1500 kg of fully-fertilized manure and compost or 45-75 kg of special fertilizer for vegetables per mu. After cultivating, ridges and ridges are made, and the width is 1.2-1.5 m. After the cultivation in the greenhouse, the shed will not be removed, the apex will be left, the skirt will be removed, and the insect net will be covered at the original skirt; if conditions permit, it can also be covered with insect nets. The greenhouse covered with the insect-proof net group film should minimize the coverage of the top film, increase the area of ​​the insect-proof net, increase the ventilation in the shed, prevent the temperature in the shed from being too high, and cause the cabbage leaves to shrink and affect the quality of the cabbage. Or cover the shade net on the roof to make the Chinese cabbage grow normally.
4, sowing
Pour the bottom of the water before sowing, and use strips live or spread. The amount of seed per mu is 500-1000 grams. Cover with a thin straw or shade net after sowing. Generally, no water is sprayed before emergence, and if the weather is dry, the cover such as straw or shade net will be sprayed and moisturized in the morning and evening.
5, field management
(1) Interplanting weeding
The seedlings are released 2-3 days after sowing, and the cover is removed in time after emergence. When the first true leaves are grown, the first seedlings are taken. It is better to go to the dense seedlings sooner rather than later. When 4 true leaves are grown, the second seedling is carried out, and the weak seedlings and diseased seedlings are removed. At the same time, the market can be combined with the market to start the seedling market. At the same time as the seedlings, weeds are removed.
(2) Fertilizer and water management
Watering 1-2 times a day after the seedlings, should be poured in small water, pouring horse water, avoid flooding and watering at noon on sunny days, or use micro-irrigation facilities to spray watering and fertilizing. Generally, the first top dressing is carried out in the 3 leaves and 1 heart. The time, frequency and fertilization amount of the top dressing are determined according to the soil fertility condition and the growth potential of the vegetable seedlings. Generally, 5-10 kg of urea per acre is applied and evenly applied to the noodles.
(3) Disaster weather management
During the rainy season and when encountering typhoon and rain, the drainage should be cleared in time to prevent water from accumulating in the shed, causing the death of the Chinese cabbage. When the typhoon comes, it should be based on the wind level forecast of the meteorological department, and the anti-Taiwan anti-Taiwan work should be done. If necessary, the film should be uncovered. In the hot and dry weather in summer, water should be watered in the morning and evening, and the horse water should be irrigated. On the one hand, it can fully meet the water demand of the cabbage growth, on the other hand, it can adjust the microclimate in the shed and reduce the temperature of the shed.
(4) Pest control
In summer, high temperature and excessive rain, cabbage often occurs dead seedlings, or roots, or soft rot, so the field must be drained smoothly to prevent water accumulation in the field, the field should be removed in time for the soft rot field, and used 8% Ningnanmycin 1000 times solution or 20% thiabendone (Dragon's bacteria) 500 times solution or 47% Chunleimycin. Copper oxychloride (Galungong) 750 times liquid spray or root irrigation control, Spray once every 5-7 days. The main pests of summer cabbage are: aphids, cabbage caterpillars, diamondback moths, whiteflies and so on.
Disclaimer: Some articles on this website are transferred from the Internet. If legal rights of third parties are involved, please inform this website. phone
Guangdong Widinlsa International Co.Ltd , https://www.gdwidinlsa.com