Cabbage cultivation technology
The specific guidance for the cultivation techniques of cabbage is as follows: The main root of S. oleifera is underdeveloped, with many fibrous roots and adventitious roots. Therefore, it is better to retain water and fertility and to facilitate irrigation and drainage. Loosely cultivate loam, sandy loam or light clay with high organic content. After the soil is selected, about 20 to 40 days before the planting, 3,000 to 4,000 kilograms of decomposed organic fertilizer (soil or pig manure, etc.) is applied per acre, and 30 to 50 kilograms of superphosphate, 150 kilograms of plant ash, and then deep-dip. Turn fertilizer into soil. Before the planting, the seedlings were flattened, and the seedlings were planted according to the planting density. The earthworms were about 20 cm in height and 4 rows per seedling. Because of the good drainage conditions on the slopes, deep trenches are not required.
Seeding Seedlings Summer cabbage is generally sown in the middle or late May, and fertile soil and well-drained soil are selected for the seedbed. Before the planting, the decomposed manure and livestock manure was applied. After the entire leveling and screed was completed, it was opened to a width of 1 to 1.5 meters. The cabbage seeds are then sown on the seedbed. The amount of seed per acre is between 50 and 100 grams. Sprinkle immediately after sowing to cover 0.5 cm of fine soil. During summer seedlings, the temperature is high, and sometimes heavy rain is caused. This will bring about seedling growth. Due to the bad influence, after applying sowing, straw, straw or shade nets can be used to cool down properly to prevent heavy rain and sun exposure. The height of the sunshade should be 1 meter, and the shade material should not be too dense. Light, with the growth of seedlings, should gradually reduce the shading time, until the planting is completely shade-free, in order to improve the resistance of seedlings, and gradually adapt to open climate. After the seedlings are unearthed, the water is poured once a day in the early stage, and water is poured once every other day. When the seedlings have three true leaves, the number of waterings is gradually reduced to avoid excessive humidity in the seedbeds, thus causing seedlings to grow indefinitely.
When the planting age reaches 35 to 40 days (6 to 7 true leaves), it can be planted in Daejeon. When transplanting, pay attention to transplanting with soil. In the evening before raising seedlings, pour enough water to start rooting. Planting time should be selected after 4 o'clock on a cloudy day or sunny day to keep the seedlings alive and grow well. Before the planting, first open the hole according to the line spacing, then move the seedlings with soil into the hole, and use the fine soil to cover the clod of the root zone. The cover soil cannot be too high, the opening hole cannot be too deep, or the whole sorghum is opened again. Immediately after setting up the soil, the root water was poured.
After field management, the seedlings in the field are the hot weather and the amount of water evaporation is large. Therefore, it is necessary to pay attention to watering in time in order to supplement the water and cool the water in time. However, it is not possible to pour too much water too often. The plants grow slowly instead, so the water should be properly controlled to keep the leaves from wilting at noon on a sunny day. The principle of watering during the rosette period is to have a certain soil moisture, but also to properly control the water, so that the growth rate is not too fast, and the watering volume is increased when the rosette period has not started to enter the ball stage. In order to obtain high yields, in addition to basal fertilization, topdressing is required to be repeated, and the amount of topdressing each time varies depending on the growing season. From the time of planting to the sealing of the rosette leaves, it is not appropriate to apply too much fertilizer to the farmhouse manure because of the high temperatures and temperatures at this time. The late growth of rosette leaves and the early and middle stages of the ball should be repeated, and the concentration and dosage should be increased. Each time, about 15 kilograms of urea can be applied per acre, and manure water can be poured immediately to promote rapid growth. Late in the game, no fertilizer is applied. In terms of fertilizer types, nitrogen fertilizer was the main type in the early stage. After the rosette stage, nitrogen and potassium fertilizers are mainly used, together with a certain amount of phosphate fertilizers, or compound fertilizers. The total amount of topdressing fertilizer is generally 30 kg of urea per mu or 60 kg of ammonium sulfate or 3000-4000 kg of human and animal waste, 150 kg of plant ash, and 25 kg of superphosphate. Top dressing and watering are generally combined. When the amount of water is large, watering is performed separately. 3 to 4 times of cultivating and weeding shall be carried out, in principle, moderately after heavy rain or irrigation, to prevent the growth of weeds, and to cultivate soil so as to facilitate drainage and root growth.
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