1. Preparation before broadcast. (1) It is better to use corn, potatoes and grain crops as the top crop. For crop rotations of more than 4 years, avoid cropping and cultivating crops. (2) Apply base fertilizer. Farmyard fertilizer 4000 kg, superphosphate 50 kg, after all kinds of fertilizers are mixed, one-time application when turning the ground. (3) Fine soil preparation. Plunge 25-30 centimeters deep and suppress it. (4) Seed treatment. Select strong resistance varieties with strong resistance to polyploidy, such as sweet 303, 304 and 305. Spread the bulbs 3 days after sowing and smash the bulbs. For every 50 kg of seeds, use 50% phoxim EC to 100-150 ml, water to 5-7.5 kg, boring for 24 hours, soaking after drying, if the blight is serious, Can be used Fujimi double 0.25 kg or Ferney seedlings too 3 kg seed dressing per 50 kg seed. 2. Cover and sow. (1) Select 60-80 cm micro-membrane or linear membrane according to the plant and row spacing. (2) In the dryland, in the case of artificial coverage and single mechanical coverage, the procedure of drilling and sowing after the first film is applied. When the film is covered, the film is straightened, and it is closely attached to the ground. The sides are covered with 5-6 cm of soil. Every 4-6 meters of pressure on the earth belt, mechanized operations to be combined with manual edge film pressing edge reinforcement plus soil. (3) The sowing date is generally around April 20, and the latest after May 1st will ensure that the seedlings will emerge after the final frost. If you want to advance the film, promote early-onset seedlings, poor sensation, etc., immediately after the natural rainfall sowing or sowing water, can also be transplanted after the film tube nursery transplanting, sowing should not be deep, the deepest is not super 3 cm, consistent depth, 8-10 tablets per hole. (4) When selecting a 60-cm plastic film, plant a wide-narrow ridge, plant two lines on the membrane, spacing 30 cm, large row spacing 48 cm, 27 cm spacing. With a 80 cm mulch, it is planted to a size of 5026 cm. The density is generally over 4500 per mu. 3. Field management. (1) check seedling film. In case of strong winds, the cover film shall be promptly inspected. After the film is covered, it shall be observed that the rain will break the soil compaction, help the seedlings be excavated, and seal the membrane holes. (2) Place seedlings in divided times. After the first sowing, pay attention to the inspection seedlings, put the seedlings in time, until the beet grows a pair of true leaves when the hole breaks the seedlings (hole diameter 5 cm), the seedlings are not the top film principle. In combination with seedlings, it was found that seedlings were cut off and replenished in time for reseeding or transplanting and planting. Two pairs of true leaves were released and the seedlings were released. The seedlings were sealed with wet soil, the seedlings were not released on a windy day at noon, and the seedlings were postponed on a cold day. (3) seedlings, Dingmiao. A pair of true leaves combined with seedlings, 2-4 strains per hole, 3 pairs of true leaves when Dingmiao. (4) Dressing. After the seedlings were sealed and ridged, that is, before the rain in mid-June in mid-June, 25 kg of urea was chased and the depth of the application was 9 cm. (5) Prevent pests and diseases. There are many beetles at the seedling stage and they should be sprayed with 1000-fold of 50% phoxim EC in time. In July, 10% of plants in Daejeon were spotted with brown spot, immediately 40% of Weiwei Wei or 50% of Duo Tonic Suspension, 75g of water per mu, 40-50kg of water, and no wind at 4 o'clock in the afternoon. Surface spraying. (6) Remove weeds in the field in a timely manner in the early stage of growth, remove the film in the middle period, and timely harvest. Smart Factory Smart Factory Automated Precision Inc. , https://www.apiasean.com