The normal method of planting onions in shandong, which is planted in the autumn of the year in order to increase the winter with seedlings; the second summer, which moves to harvest onions in the early winter; if seeds are to be harvested, the growing plant will be stored in the open or in the facility for winter, passing through the springing phase at 2-5°c temperatures, and in the third spring, it will be replanted in the field, gushing flowers under long-day photographs and then harvesting seeds. Onions can be broadcasted in autumn or spring. Export onions, usually broadcast in spring, were harvested and packaged for export at the end of october of the year. The root of the onion is a stringed strategic root, distributed mainly within the 15-30 centimetres of the ground。
Onion requirements for environmental conditions: temperature: cool weather conditions, gestation 13 - 20°c, plant growth 20 - 25°c, slow growth below 10°c, weak growth above 25°c, yellow foliage, prone to disease, 35 - 40°c, semi-sleep, partly atrophy. 2 waters are very drought-resistant, but due to weak roots, it is necessary to achieve 70-80% soil moisture and favourable growth at 60-70% air moisture. Three light, low demand for light, so it's fit to be implanted. 4 soil nutrients are growing well in the deep, fertile land that is well drained. The whole growth process is dominated by nitrogen fertilizer, but more potassium phosphate is required in the later stages of growth。
Onion seed breeds conventional planting techniques: first, breeding seedlings, onion selection is a taboo vegetable, and breeding grounds are a taboo. The seedlings are to choose the high pits that lead to the non-minus crops. The choice of grasslands is strictly forbidden, otherwise the seedlings are bred. Child-rearing is done exclusively. 2. After harvest, the former crop is tanned twice, with 20 days of leisure. Onions are given up for up to 50 days, thus causing 1,000 kilograms of decomposition and fatting to be applied to the nursery. It is 1. 5 metres wide and is made of a small pyramid of 1. 1 metres net. Fine. Close the ditch. 3. Export onions, the variety of which is generally foreign. For every 100 grams of seedland, 35 to 40 square metres of seedland are required, so that the seedlings can be planted in an acre of field. Sowing is generally used and sowing is very uniform. Regular broadcasts were held in early april. 4. Water (insecticides in water) is to be poured after the broadcast, 60 per cent soil moisture is to be reached and no water is to be poured until seedlings are secured. The dry soil is 0. 5 cm thick after watering and the soil is not watered to prevent slabing. The membrane can be covered before seeding, contributing to warming, wetting and preventing rain from causing soil slabs. However, high temperatures must be prevented. 5. The temperature at which onion seeds sprouts at about 18°c. Five to six days after the show. Sixty per cent of the seedlings are released in time to remove the membrane, which is too late and weak. When the membrane is removed and washed in order to prevent heavy rains, small shacks will be set up, covering the membranes before the rain, and the membranes will be removed after the rain, especially during the first half of the month before the seedlings arrive after the rain, otherwise they will cause a sudden fallout and a massive fall. 6. Water may be poured once when the seedling reaches its waist, so that the leaves can be stretched and firmened. We'll have one or two more small waters. The water should not be excessive, lest the seedlings grow steep. 7 - three or four times during the whole period of the seedage, with a substitution between organic and fertilizer use and a low fertilizer concentration of no more than 0. 5 per cent, which contributes to the growth and growth of the seedlings and provides a good basis for their growth. 8. When seedlings are found, dry soil must be covered in a timely manner, especially after heavy rains. Slender beds need to be weeded and treated in a timely manner. Standards for seedlings: 30 cm tall, 1 cm thick, green leaves, no pests, accumulation of nutrients. It's about 50 days old。
