Continuous cropping cultivation techniques of Onion, Cucumber and rape

Transplanting cucumber after onion harvest, sowing rape after harvest, yielding 4500 kg of onion, 5000 kg of cucumber and 2500 kg of rape per mu, the total output value of three crops is more than 10, 000 yuan, and the net income excluding cost is about 8000 yuan. Stubble arrangement: onions were sown and raised seedlings from September 1 to 10, planted from late October to early November, and harvested from late May to early June. Cucumber was sown in early June, seedlings were pulled in mid-late September, and then sown rape. Oilseed rape was harvested from late October to early November to form annual production. Main cultivation techniques are as follows: 1. The variety of onion selected Zixing onion, selected fertile, loose, water-retaining and fertilizer land, made flat beds, watered enough bottom water, sowed dry seeds, covered soil 0.5 cm thick, and planted one mu of onion with a seedling bed of 50 square meters and a seed amount of 300 to 400 grams. From late October to early November, 4000 kg of rotten organic fertilizer and 50 kg of diammonium phosphate were applied per mu, the row spacing was 18 cm, and the plant spacing was 10-12 cm. The planting depth was suitable for the original buried depth, and the seedlings were graded according to the size of seedlings. Watering in time after planting, ploughing and hoeing for 2 or 3 times after slow seedling, increasing soil temperature and promoting rooting. Before freezing the soil, pour enough frozen water, and use plastic film to buckle the small arch shed to protect the seedlings to survive the winter safely. After turning green in the second year, remove the small arch shed, combined with pouring back to green water, 10 kg of urea per mu. Enter the vigorous growth period of stems and leaves, the soil should be dry and wet, enter the bulb expansion period, irrigate a small amount of water every 4-5 days, topdressing urea twice, 20 kg each time. Pay attention to pinch off the bolts at the initial stage of bulb expansion. Stop watering a week before harvest and harvest when the false stem is soft. two。 Cucumber varieties with disease resistance, such as Jinyuan 5 and Qiumei 5, were directly broadcast in early June. After onion harvest, the soil was fertilized with 3000 kg of rotten organic fertilizer, 30 kg of calcium superphosphate and 10 kg of potash fertilizer per mu. After the land was leveled, the border was made into a border with a width of 120cm, and then ditches were opened along both sides of the ridge, and two rows of cucumbers were planted in each row. Before sowing, first water in the ditch, after water infiltration, sow the budding seeds in the ditch, every 20 cm hole, each hole sow 2 seeds, and then cover the soil 2 cm thick. In the seedling stage, small water should be poured in the ditch, more hoes on the back of the ridges, fill the ditch with four hearts and one leaf hoe, and tie the vines in time to prevent seedling lodging and disease. Cucumber is a kind of vegetable that needs a lot of water, so we should water it with small amount of water and top dressing with less fertilizer. After the appearance of the lateral branches, 2 or 3 leaves were left in front of the female flowers to pick the heart, and when the main vine climbed to the top of the frame, it was watered and fertilized to make the melon turn back. 3. Rape varieties are selected from Beijing May vine. Cucumber seedlings are directly sown or striped sown after pulling seedlings. The distance between seedlings and seedlings is 10 cm × 10 cm. Topdressing twice during the whole growth period, each time 10kg of potash. Stop topdressing 10 days before harvest, rape with a height of more than 15 cm can be harvested and listed at the right time according to the market.