Question 2: Cultivation techniques of four-season onion. Four-season onion can yield 2-3 years once sown, usually in March, April or September, 65438+ 10. The original planting habits of leeks in rural areas of our city, vegetable farmers are scattered planting, do not pay attention to yield and efficiency. In recent years, the planting area of four-season onion has gradually increased, and the scale of some professional households has grown. Through continuous summary and improvement of cultivation techniques, the yield has increased year by year, reaching 7000-8000 Jin of leek per mu, with a net income of more than 6000 yuan per mu, which has produced high economic benefits. 1 Four-season onion varieties are drought-resistant, cold-resistant and heat-resistant, and have no strict requirements on soil, temperature, fertilizer and seedling age, and strong disease resistance, so they are suitable for planting in sandy loam and loam. 2. The cultivation method is sowing once and harvesting many times. Generally, sowing and planting once can yield 2-3 years and 7-8 crops a year. After planting for 2 13 years, the plants become thinner and grow poorly, so they should be replanted in different places, and it is not suitable for continuous cropping. 3 cultivation techniques 1) Fine soil preparation, sufficient base fertilizer, four-season onions should grow in loose and fertile soil, and the soil should be fully turned before sowing to make the base of pests and diseases as low as possible. Rotten organic fertilizer is used as base fertilizer, generally 2500 kg per mu, and 40 kg of ternary compound fertilizer is applied. 2) Sow in time, the suitable temperature for the growth of all-season onion is 10-25℃, which can be planted all year round, with good quality and strong adaptability. In high temperature season in summer, sunshade net can be used to cool down, and small arch shed can be used to keep warm in winter. The local perennial planting should be planted in March and April, or in September, 65438+ 10. 3) Cultivate strong seedlings. No matter direct seeding or transplanting, we should cultivate strong seedlings. Generally, the sowing amount per mu is about 10.5kg, so as to achieve uniform and precise sowing. The border width is 1.2m, which is too wide to be managed. The transplanting depth should be shallow rather than deep, 6-7cm, and the density should be dense rather than thin. The row spacing is15-10cm, with 3-5 plants per hole. After planting, there is enough water to survive. After planting, shallow hoes are used for loosening soil and weeding. 4) Thin fertilizer and light application, moist soil, shallow root system of onion in four seasons, intolerance to centralized fertilization, drought and flood, and poor competitiveness with weeds. Field management must be done with thin fertilizer and light application, rain drainage and dry irrigation, and soil moisture. The growth period of four-season onion is short and there are many stubbles. Direct seeding seedlings will be on the market for 60-80 days, and transplanted seedlings will be on the market for 30-40 days. After planting, the soil should be kept moist. Generally, water once every 7 days, combined with topdressing, and topdressing with 0.2% urea. In early summer and autumn, you can always keep half ditch water to keep the border soil moist. Especially in summer, furrow irrigation and water exchange can reduce soil temperature and prevent the delay and damage of high temperature to seedlings. Trench cleaning and drainage should be done well in rainy season. 5) Prevent diseases and insects and reduce pollution. Downy mildew is the main disease of onion in four seasons, and 25% metalaxyl can be sprayed 500 times. The main pests are onion aphid and liriomyza sativae, which can be controlled by pesticides such as Yijijing and Avermectin.
Question 3: How to plant the preparation soil for the four seasons shallots? Put some fertilizer on the bottom, mix the chicken well and put it in the pot. Sprinkle onion seeds after watering and cover the soil with 0.5- 1 cm. You can also sow in the mulch first and then water it.
Question 4: When do we plant green onions in autumn? Green onions are sold in the market all year round, but they need to be planted in three time periods. 1.Sow the green onions in the first year of autumn planting in early September, and bring the seedlings to winter; Planting in the first half of May in the summer of the following year, harvesting before winter, and wintering in the cellar or open field; In the spring of the third year, lots were drawn to blossom, and the seeds were harvested in the second season. 1988. TV seedlings can be classified as shallots from early May to late June. It can also be used to plant furrow onions in flat beds (pinch onions) or narrow row spacing, which can be used as autumn onions before and after long summer, or as early spring croissants after wintering. 2. Onions are planted in spring, sown after the soil thaws in early spring, supplied as onions before the hot summer, or harvested as dried onions or ditched onions in the year after planting. It can also be used as croissants or as seed plants to keep seeds in winter. 3. Green onions are planted from late July to early August in summer, so they are also called green onions. When overwintering in the same year, the plants were larger, and the vernalization process was easy to complete. In the next spring, they germinated early and bolting and flowering quickly.
Question 5: When are the onions planted? I don't know whether you mean transplanting or raising seedlings by seeds.
The transplanting time is relatively wide, and it can be done all spring. If it is too hot in summer, the survival rate will be discounted.
If you sow seedlings with seeds, you must wait until around the Millennium in the 24 solar terms. Early spring onion seedlings are prone to grow moss (after the onion grows moss, the previous seedlings will die and germinate from the root disk again, which means that the previous months have been busy for nothing), and the growth time is short before winter, so it is difficult to form strong seedlings.
Question 6: How to grow leeks all year round? Choose varieties with high temperature resistance and good commodity. It is best to apply 3000 kilograms of decomposed manure (pig manure, chicken manure, etc.). ) per mu as base fertilizer, or per mu 100 kg compound fertilizer.
Generally, land where onions and garlic vegetables have not been planted for 2-3 years is selected for planting. In case of continuous cropping in the second year, each mu should be sprayed with 100 kg lime, and at the same time, the common liquid for tree protection should be sprayed for sterilization before planting. Slightly sandy red soil is most suitable for planting leeks. Generally, 9- 10 rows are planted in the border width (flat ditch) of10, and the hole spacing is 15cm, with 2 plants per hole. It is best to plant it deeply, but not more than 5 cm, which can increase the length of green onions and improve the yield and quality.
Post-planting management can prevent and control plant diseases and insect pests in the process of onion growth, reduce the wound of onion tube, and spray strong stems to improve the height, which can make the stems of plants thick, the leaves plump, the leaves fresh and tender, the plants lush and the natural flavor rich. At the same time, strengthen pest control.
On the day of hydroponics, planting water and spraying new high-fat film liquid can prevent the invasion of bacteria and shorten the slow seedling stage. After 7- 10 days, irrigate with slow seedling water 1 time. The root system of shallot is underdeveloped, shallow in distribution and weak in water absorption. Therefore, small irrigation should be adhered to during drought to prevent drought and flood disasters. After surviving, you can irrigate Paoma water at 4: 00 a.m. on a sunny day, so the water and soil temperatures were the same at that time, and the accumulated water in the ditch was basically drained after the sun came out. If irrigation is carried out at noon, the temperature difference between soil and water is large, which is not only easy to burn roots and kill onions, but also easy to induce many diseases. Weeding Because leek roots are few, loosening soil to weed easily damages roots and affects growth, so herbicides are widely used. When using herbicides, it should be noted that when the temperature is high or the soil humidity is high, the dosage of herbicides should be low, and when the temperature is low or the soil is dry, the dosage can be appropriately increased. Generally, it can't be used when the temperature exceeds 30℃, otherwise it will easily cause phytotoxicity. Two days after transplanting, spray 50 ml of 50% acetochlor water per mu to control grass damage.
If urea is removed or manure, water and fertilizer are topdressing in rainy days, it should be applied less often and thin fertilizer frequently. If it doesn't rain after urea application, start drip irrigation facilities or spray water with a kettle to avoid burning plants. Spraying new high-fat film solution at the same time of topdressing can improve the absorption and utilization rate of fertilizer and reduce the dosage of fertilizer.
Question 7: When do you plant onions for 20 minutes? There are many kinds of onions, which are mainly divided into green onions and shallots, and can be subdivided into chives, shallots and chives. Basically, shallots can be planted all year round, preferably in spring (April). Green onions are mostly sown in autumn and harvested in winter.
Question 8: Planting method of four-season onion 1 Bulb seedling is often carried out in April-May or September-10. Generally, bulbs reserved in the previous year can be used for planting, or bulbs with roots (leaves are cut off before planting, not white leaf sheaths) can be used for planting. Every 2-3 seed balls in the soil, the spacing is about 10 cm. It is not advisable to plant them too deep. Bulbs are slightly exposed from the soil surface, then watered, and can enter normal management after survival. 2. It is best to use fresh seeds to raise seedlings with seeds, because their life span is only about 2 years. Sowing is usually carried out in March-April, or in September-65438+1October, and the optimum germination temperature is13 ~ 20 ~ C. Sow the seeds on the soil surface, cover the soil with about 1 ~ 2cm, water them to make them permeable, and germinate in about 2 weeks when the temperature is suitable. The seedlings grow slowly and can be transplanted and planted after about 4 ~ 5 weeks of germination. Every 8 ~ 1 plant, plant in clumps according to 1 plant, and water it, otherwise it shall not be transplanted. Note: no strict light is needed for tolerance to thick fertilizer.
Question 9: How to sow the seeds of four-season leek? How many days after sowing? Just bury it shallow.
Question 10: the difference between shallots and four-season shallots. Onion is also called domestic onion.
Old people only buy onions like this.
It smells good and can be dried into onions.
Onions in four seasons are more common and less spicy.