1. Suitable varieties: Elian 4ã€Baoying Daohong 2. After fertilizing and harvesting crops before planting, it should be repeated deep-cultivation by 20-30 cm. Generally, Mushi fully decomposes human and animal urine, or stacks fertilizer 2500-3000 kg, plowing Into the soil, make it smooth, put 3-5 cm shallow water. 3. Seed selection requirements have a complete two-section, single branch weighs 250 grams or more. 4. Planting is planted in mid-April. The cultivation of medium- and late-maturing varieties is relatively dilute. The row spacing is 2-2.5 meters, and the distance between holes is 1 meter and 100-500 acres are planted. About 150-200 kilograms of seedlings are needed. For the early maturing varieties, a row spacing of 0.7 meters was used. Each hole was planted with 1 branch or 2 branches, and about 600 acres were planted. About 200-250 kg of seedlings were planted. Each row of planting holes should be staggered and arranged in an interlacing manner, and all kinds of dome buds should be directed toward the fields. When planting, the buns were inserted slightly downwards into the soil. The depth of the top buds was 8-12 cm, and the rear section was slightly upwards tilted. The angle between the front and the back was about 25 degrees from the horizontal plane. 5, cultivating weeds after the emergence of weeding, weeding, after every 20-30 days once, until the "vertical leaves" basic seal behavior only. When Shimoda moved his feet, he should be light so as not to step on the underground stems and buds. 6, the water layer management to maintain the early growth of 5-10 cm shallow water, so that the soil is easy to warm and warm. Waiting gradually deepened, to reach the "vertical leaves" when reaching 20 centimeters. After the beginning of scarring, the water level should be drained to 10 cm within 3-5 days. In case of heavy rain, drain water in a timely manner to avoid delays. When new crops mature, the water level should be gradually reduced to 3-5 cm. 7, stage fertilizer in addition to fertile soil and Shizuda applied base fertilizer, only need to apply a fertilizer, generally have to stage fertilizer. After more than 30 days of planting lotus roots, when a few leaves emerge from the field and rise to the surface of the water, the fertilizer is applied to the trees and the urea in the mu is not more than 20 kg. When the “vertical leaves†overwhelm the whole field and form a bread-headed leaf group, it indicates that the ground is beginning to scab and should be re-applied. The top dressing should be applied when the dew is completely dry, and the topsoil should be drained or drained before the application. Spray water after application to rinse the leaves to prevent chemical burns. 8. When the main stem or branch is slightly extended to the field side, it is necessary to extend the hand from the unwrapped leaf packing direction and reach out to the soil and gently pull it out. Turn your head to the field. 9. Diseases and pests control The main diseases include lotus root rot disease and brown spot disease. Lotus root rot is sterilized with 50% carbendazim or 70% thiophanate-methyl wettable powder. For diseased fields, they must be replanted at intervals of four years. The brown spot disease is controlled by 50% carbendazim 600 times spraying, and at the same time pay attention to the application of nitrogen fertilizer, appropriate application of phosphorus, potassium, calcium fertilizer. The main insect pests are lotus root food insects (grasshoppers), lotus root tube borers and so on. Available trichlorfon mixed fine soil 25-35 kg, even measures, and immediately plough the field, so that pesticides mixed with soil poisoning to kill mantle; with hydrogen bromide Chrysanthemum or 2000 times kungfu chrysanthemum spray control lotus root tube. 10. Harvesting to early September. When the “backyard leaf†is old and dark, it shows that the self-development has been completed. At this time, the water has reached the harvest standard and can be harvested and listed on the market. The output level is 2000-3500 kg.
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