The selected land and selected varieties are far away from chemical plants and sources of living pollution. The rivers and rivers are clean and tidy, no poisonous, high-residue pesticides have been applied, and fertile lands with flat, easy drainage and irrigation have been selected, and heat-resistant, water-resistant and disease-resistant varieties have been selected in the summer and hot seasons. Such as green Sheng; winter selection of cold-resistant varieties, such as green Austrian.
Second, the field fertilization field to remove weeds debris, plowing the soil depth of 10-15 cm. Before ploughing, apply sufficient rotted chicken shed ash fertilizer and apply 3,000 kg per acre; after ploughing, apply 50 kg of compound fertilizer per acre. If you then broadcast small green vegetables, then after the end of the harvest, you must stop baking for 10 days before sowing, so that the soil becomes dry and bactericidal.
Third, sowing seed live broadcast: sowing land into a width of 2 meters, 5 centimeters high level, 1.5 kg per acre seed amount. After sowing, the soil surface will be patted with a hoe, and in case of drought, the soil should be settled with a foot. Finally, the water should be poured in enough water, and the seedlings can emerge after three days.
Seedling transplanting points: 667 square meters of cultivation seedlings need seeds 100 grams. The seedbed is 12 meters long and 1.5 meters wide. The bed soil is used to screen 30 kg of cooked excrement, 5 kg of plant ash, 500 g of ternary compound fertilizer, and 150 g of potassium dihydrogen phosphate. The soil was sterilized by spraying the seedbed with 3 grams of Greenhenge No. 1 or 100 grams of carbendazim, and 80 grams of trichlorfon or 100 grams of Yishendan was used to exterminate the soil. Turn over evenly, flatten the seedbed like a mirror, and smash the sides. Drenched with water, water infiltrated, mixed with fine soil and sprinkled seeds. Cover 0.3 cm of sifted fine soil (2 grams of green henge water, wet seedbed).
4. Cultivation points should be cultivated in sandy loam where the soil is deep, loose, fertile, sunny, and has good drainage and irrigation conditions. After the emergence of a combination of water application of a thin manure, after only water without fertilizer, with water to adjust fertilizer. Watering "see the sky, see the land, see the food," depending on the light, pouring. Sunny days watering 1 - 2 times to keep the soil moist. The watering time is generally early morning and early evening. The earlier the morning gets better, the evening will be poured at 19-20. The water is sprayed on the insect-proof net to allow the water to be poured out from the net-proof part and poured one by one. It will not be poured back to prevent the mud from splashing on the leaves. Appropriate growth temperature 18°C～28°C, average daily temperature above 0°C, can be planted in all regions of the country. In the middle and lower reaches of the Yangtze River, the southern region can grow year-round, generally 25-40 days, can be harvested in succession. 4000-5000 kg, 8-9 months sowing, planting from September to October 25-35 cm away from the planting space, you can harvest Dacheng Cai, higher yield.
V. Prevention of pests and weeds
1. Disinfection: Each two small green vegetables, disinfection of the vegetable once, each time with a green Hunter No. 1 5000 times spraying a company.
2. Weeding: Before sowing, sprinkle with 48% trifluralin EC 100--125 ml water. A spray of Losbee is used to prevent fleas after sowing or before the 2 leaf stage.
3. Insect repellent and insecticide: after sowing and spraying, the insect nets shall be covered at the latest at the 2 leaf stage. In high temperature and dry weather, after sowing, the insect net will be flattened and moistened on the surface to promote seedling emergence. After emergence, the insect net will be propped up with a bamboo bow; there is a small amount of pest damage that is BT or dish hi, green net and other high efficiency and low toxicity. , low residual pesticides on water spray control. Stop spraying any pesticides 15 days before harvesting.
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