1. Selection of good varieties: Common autumn and winter Chinese cabbage varieties are not suitable for spring-season cultivation. At present, the better varieties used in production are Shengchun, Chunjiang, Jujin, and Spring and Autumn Period 54. 2. Appropriate sowing: The greenhouse is covered with small arch sheds, covered with mulching, planted in mid-February, transplanted in early April, and harvested and marketed in mid-May. Small sheds and mulching cultivation, about 1 week in advance nursery, transplanting. The mulching film covers the live broadcast and is sown in late March and early April, and harvested from the end of May to the beginning of June. 3, sowing seedlings: early spring sowing to conduct heat preservation seedlings to prevent early convulsions. In the greenhouse, nutrition seedlings are planted, and 2 seeds are sown per seedling. The amount of seed used per mu is 50 g. After the real leaf grows, the seedlings will be settled, leaving a strong seedling for each pod. In the greenhouse, multiple layers cover the insulation, and when the cold wave comes, the insulation material is covered on the small arch shed. When the temperature of the shed is higher than 20°C during the day, ventilation and cooling are needed to prevent leggy. Ventilation and hardening of seedlings were conducted according to the conditions of seedlings before transplanting. 4, timely colonization: Maturation age of 40 days, there are 6-7 leaves when the election sunny planting. Do 1 meter wide rake, 2 lines per pod, plant spacing 40 cm, 3000 cultivars per mu. Before planting, the mulch was covered with a plastic film. After planting, the urine was excreted and the membrane hole was sealed with mud. Broadcast 2 seeds per hole, cover the film after sowing, after 5 days or so, the seedlings shall be timely and film-breaking and seedlings shall be placed. The pre-growth stage is dominated by heat preservation. In the later stage of growth, the membrane is ventilated according to the temperature, and the temperature in the greenhouse is maintained at 20-25°C during the day and 15°C at night. In the middle and late April, when the minimum temperature is above 15°C, all membranes will be removed for open cultivation. 5. Fertilizer management: Spring cabbage has a short growing season. After the planting, the management is mainly promoted and promoted in the end. Basal fertilizer was applied before planting and 4000 kg of organic fertilizer and 50 kg of superphosphate were applied per acre. During the growth period, urea or human excreta are applied in time according to the growth of the plant. During the ball stage, the ball fertilizer is applied again, and 10-12 kilograms of urea is applied per acre. 6, pest control: to pay attention to the prevention and treatment of virus disease, downy mildew, soft rot, maggots, yellow striped jump, diamondback moth and so on.
Compressed air is purified through the air dryer and filters to a certain level for main plant to work with. Air buffer is incorporated for smooth supply of compressed air thus to reduce fluctuation of compressed air source. The plant produces oxygen with PSA (pressure swing adsorption) technology, which is a time proven oxygen generation method. Oxygen of desired purity at 93%±3% is delivered to oxygen buffer tank for smooth supply of product gas. Oxygen in buffer tank is maintained at 4bar pressure.
With a cabinet for small capacity or container for big capacity, all the parts can be involved in, and removable with a vehicle.
Removable Oxygen Generator Removable Oxygen Generator ,Oxygen Production Machine,Oxygen Breathing Apparatus,Oxygen Facility Hunan Eter Electronic Medical Project Stock Co., Ltd. , https://www.eter-tech.com
Spring Chinese Cabbage Cultivation Cultivation Spring
Spring Chinese cabbage cultivation can be used to fill spring defects, with an average plant weight of 1.5 kilograms and an income of 5000-7000 yuan per mu.