In the winter, we introduced Japan's very early birth, Liangqing and South Korea's strong, delicious and a total of four varieties for good performance, and will be available before May Day. The output value of 667 square meters is nearly 5,000 yuan, and it has a good market competitiveness.
First, seedling technology
Planting early-season Chinese cabbage requires pre-planting indoors. The whole growth period takes 90-100 days, of which the seedling period is 30 days. The temperature required during the nursery period is between 15-28 °C, and the mid-January seedlings are in the coldest season of the year. The seedlings need to be equipped with geothermal heating facilities. Conditional can be buried in the nursery bed
The hot heating line can also be used for the pit heating method of sweet potato seedlings. The seedling raising device can be made of low-barrel or plastic enamel, and can also be used as a nutrition. The seeding distance is kept at 8 cm x 8 cm or more per seed or 2-3 seeds per hole, including 1 cm of soil, water spray cover film, and then inserted into the bow shed. Cover the straw at night.
The preparation of culture soil varies with different conditions. We use 2 parts of sifted disease-free soil, and 1 part of vermiculite, perlite and organic fertilizer can also be mixed with 3 parts of disease-free soil that has been screened and fertilized. 2 parts of fine furnace ash were mixed. In each cubic meter of mixed culture soil, 200-300 grams of fungicide, such as formazan, carbendazim, etc., is added, then water is added to the handcuffs to form a mass, and after 24 hours of stacking, it can be installed or Make the bed, after the bed is made, the thickness is 8-10 cm. On the day before sowing, preheating and warming are required. When the bed temperature reaches 20 °C or above, sowing is carried out; after sowing, the temperature changes in the seedbed and the shed should be adjusted at any time. The seedlings can be obtained after about 5 days under suitable conditions of temperature and humidity. After emergence, the seedlings should be ventilated in time. Only one strong and stubborn seedling was left in each hole, and the rest were all removed. After the seedlings, spray a 500 times solution of the Dyson zinc fungicide to prevent the occurrence of broken disease. After that, depending on the color of the seedlings, apply 1-2 leaves of fertilizer. It should be sprayed once every 3 to 4 days from emergence to planting to ensure the appropriate lyrics
Under growth.
Second, plant management
When the seedlings grow 6-7 pieces of real time, they can be transplanted with soil in a plastic greenhouse with grass. In the case where the wall of the greenhouse is thick and has good insulation performance, there is no need for warming facilities. The planting row spacing is preferably 55 cm x 45 cm. Make a ridge every two rows to facilitate watering and management, so that about 2700 plants can be planted per 667 square meters. It takes about 60 days from planting to harvesting, and enters the rosette period after 30 days of planting. The vegetative growth is strong in mid-March and the temperature is between 5-20 °C. Note at this time
It means that the air in the shed is smooth during the day, and at the same time, the water and fertilizer management is 15-20 kg of sulphate per 667 square meters, and watering is followed. On the 2-3rd day after top dressing, attention should be paid to large ventilation during the day to avoid ammonia poisoning in the middle and lower leaves. Thereafter, as the external temperature rises and the leaf transpiration increases, water is poured every 7-10 days until the week before harvest stops.
Before the shed in the greenhouse, the base fertilizer should be applied. After 667 square meters, the fully decomposed cake fertilizer, human and chicken manure 3-4 cubic meters, calcium superphosphate 100 kg, ammonium sulfate 25 kg, potassium sulfate 15 kg, fully mixed Spreading deep. Because the stem section of Chinese cabbage is shortened, the leaves are close to the ground, there is not enough gas flow space between the plants, and the lower leaves are closely attached to the ground, which is highly likely to cause ammonia poisoning under the strong light and high temperature after watering. The leaves are whitened and die. Therefore, beware of applying various farmyard fertilizers after the shed
Shallow application of nitrogen fertilizer; if the base fertilizer is applied beforehand or the fore crop is exhausted, it can be replaced with Japanese organic rice rice 5-10 days before the cabbage is planted. Fertilizes about 500 kilograms of Japanese organic fertilizer per 667 square meters.
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