In order to cultivate roots in leeks, the roots can be cultured by direct seeding or nursery. At present, most regions in China adopt seedling raising methods. Leeks occupy a small area during the seedling stage, are easy to manage, have little grass damage, are robust to roots, and have a long lifespan. Premix Veterinary Medicine,Veterinary Multivitamin Premix,Veterinary Florfenicol Premix,Veterinary Oxytetracycline Premix Shandong Unovet Pharmaceutical Co.,Ltd. , https://www.unovetcn.com
1. Cultivate strong seedlings: When using nursery seedlings, the seedbeds should be selected from the Gaozao plots where drought can be poured, canopies can be discharged, and the leewards are sunny. In 3 to 4 years, soils of cotton and onion and garlic vegetables are not planted, and the quality of the seedlings is decomposed. 600,000 to 75,000 kg/ha of organic fertilizer, 600 kg/ha of superphosphate, 1500 kg/ha of grass ash, or 750 kg/ha of nitrogen, phosphorus and potassium compound fertilizers. After the fertilization, plunge 20-25 cm deep and make a smooth leveling. Before sowing, select sunny days for 1 to 2 days to increase the germination rate and germination potential. Choose high-quality, high-yield, disease-resistant pests, strong adversity resistance, wide adaptability, and good commercial varieties, such as 791, Pingyi No. 2, Shouguang Majie, Hanzhong Dongpi, Beijing Iron Wire Miao, Hangzhou Snow Mist, Shanhaiguan Iron Wire Miao et al. Seeds were soaked in warm water at 55°C for 10 minutes or soaked in 600 times carbendazim for 30 minutes. The liquid disinfected seeds were washed with water, and soaked in warm water at 30°C for 24 hours to moisturize and germinate. After 2 to 3 days, the seeds were ready for sowing. Seed emergence 10 to 15 days after sowing should be timely watering, top dressing, weeding and pest control. Seedling nursery needs about 60 days, during which the combination of top dressing 2 to 3 times, each with 150 to 300 kg/ha urea or 150 kg/ha of diammonium phosphate is appropriate. Seedlings have 7 to 9 leaves, planting 18 to 20 cm should be timely planting.
2, re-base fertilizer, timely planting: Although Leek adaptability to the soil is strong, but the production of pollution-free leek products have strict requirements on the soil environment. Should choose to stay away from pollution sources 1000 to 2000 meters, 3 to 4 years without the cultivation of cotton and scallion vegetables, the former is best to grow cabbage, spring cauliflower or cabbage planting. After the harvest of the previous crop, the field should be cleaned in a timely manner and the crop should be ploughed. The land on which the leeks are planted in the open field is not less than 150 meters in length. Wind barriers should be set up in the north. Wind barriers and Tian Hao are going east and west. After the planting is completed, apply 60000-75000kg/ha of sufficient quality organic manure, 300-450kg/ha of diammonium phosphate, and 1500kg/ha plant and tree ash. Scatter the soil and mix the soil and fertilizer. It is advisable to plant 3 million to 4.5 million plants per hectare. The wintering ability of leeks and the growth in the coming year depend on the amount of nutrients accumulated before winter, and the accumulation of nutrients depends on the growth of leeks in autumn. Therefore, fertility management should be strengthened during the seedling period. Usually 5 to 7 days, pour 1 water, combine topdressing nitrogen fertilizer 2 to 3 times with watering, topdressing 150 to 225 kg/ha of urea or 150 kg/ha of diammonium phosphate, and finally pour 1* fecal lean water 15000 Kilograms per hectare. Before wintering, it is mainly rooted and planted, laying the foundation for the second spring harvest. After warming up in the spring of the following year, a layer of decomposed organic fertilizer can be spread on the surface of the 750 kg/ha. More than two years old root vegetables, should also cover about 2 cm. Conditions can also take measures such as removing the roots, squats, and soils, which can increase the temperature of the ground, kill the earthworms, loosen the soil, promote root growth, and prevent lodging and rot. If there is no fertilization in winter, the soil must be re-applied in the spring, and 22,500 kg/ha of cooked earth-fertilizer should be applied. Spread 1 to 2 centimeters on the surface to facilitate the root-picking of the leek. Generally do not water after fertilization in spring, if the weather can be watered in the seedling height 10 cm after the water, do not top-dressing with water, especially not apply nitrogen fertilizer. If there is more rain and snow in winter and the soil moisture is better, you can start watering after the first harvest and loosen the soil in time. About 3 to 4 days after each harvest, the new leaves are topdressed with appropriate topdressing, followed by 150 kg/ha of compound fertilizer or 150,000 to 22,500 kg/ha of high-quality organic fertilizer. In summer, high temperature, leaf tissue fibers increase, texture is rough, growth is weakened and shows a phenomenon of resting and volt, generally no longer harvesting, should continue to strengthen root culture, lay a good foundation for the autumn production. For perennial leeks, water control and fertilizer control and pest control for weeds should be the mainstay. The cool climate in autumn and the large temperature difference between day and night make it the best season for the growth of leeks and the best time to cultivate roots. Physiological activity was strongest during this period, especially from autumn to autumn, it was necessary to re-apply water to promote its vigorous growth. Before and after the beginning of the fall, each time the quality of the decomposed manure dry fecal 15000 ~ 22500 kg / ha or soybean cake 7500 kg / ha or diammonium phosphate 600 ~ 750 kg / ha, zinc sulfate 15 kg / ha, water 5 to 7 days at 1 water , Pouring 2 to 3 times, top dressing 2 or 3 times. When conditional, single plant ash 1500-2250 kg/ha can be applied. Harvest between 1 to 2 times between late August and late September. After entering October, watering fertilizer should be stopped, and the use of drought to control the greediness of leeks in leeks, forcing the nutrients to accelerate the transfer to bulbs and roots to ensure safe wintering.